Changing active voice to passive voice is an important skill in English grammar. It helps you express the same action in different ways by changing the focus of a sentence. In active voice, the subject performs the action, while in passive voice, the subject receives the action. Understanding how to change active voice to passive voice can improve your sentence structure and writing skills.
To convert an active sentence into passive voice, you need to identify the subject, verb, and object. Then, move the object into the subject position and use the correct form of the verb be with the past participle of the main verb. For example, “The teacher explains the lesson” becomes “The lesson is explained by the teacher.”
In this guide, you will learn how to change active voice to passive voice using simple rules, step-by-step instructions, and practical examples. You will also learn how to convert sentences in different English tenses, change negative sentences and questions, and avoid common grammar mistakes.
Table of Contents
What Does It Mean to Change Active Voice to Passive Voice?
Changing active voice to passive voice means rewriting a sentence so that the person or thing receiving the action becomes the subject. The meaning of the sentence usually remains the same, but the focus changes from the person performing the action to the action or its receiver.
Example:
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Active Voice: The chef prepares the meal.
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Passive Voice: The meal is prepared by the chef.
In the active sentence, “the chef” is the subject performing the action. In the passive sentence, “the meal” becomes the subject because it receives the action.
Active Voice vs Passive Voice Structure
| Active Voice | Passive Voice |
|---|---|
| Subject + Verb + Object | Object + Be + Past Participle + (by + Agent) |
| She writes a letter. | A letter is written by her. |
| They clean the room. | The room is cleaned by them. |
| He repaired the car. | The car was repaired by him. |
Important: Not every active sentence can be changed into passive voice. Most passive constructions require a verb that takes an object. For example, “She sleeps” cannot normally be converted into passive voice because the verb sleep has no object in this sentence.
How to Change Active Voice to Passive Voice: Step-by-Step Guide
To change active voice to passive voice, you need to follow a few simple steps. The main rule is to move the object of the active sentence into the subject position and change the verb into the correct passive form.
Active Voice Structure:
Subject + Verb + Object
Passive Voice Structure:
Object + Be Verb + Past Participle (V3) + (by + Subject)
Let’s understand the process with a simple example.
Active Voice: The teacher teaches English.
Passive Voice: English is taught by the teacher.
Step 1: Identify the Subject, Verb, and Object
First, identify the subject, verb, and object in the active sentence.
Example: The boy kicks the ball.
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Subject: The boy
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Verb: kicks
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Object: the ball
The subject performs the action, while the object receives the action.
Step 2: Move the Object to the Subject Position
The next step is to move the object of the active sentence to the beginning of the passive sentence.
Active: The boy kicks the ball.
Passive: The ball …
Here, “the ball” becomes the subject of the passive sentence.
Step 3: Choose the Correct Form of the Verb “Be”
In passive voice, the verb be is used with the past participle of the main verb.
The form of be depends on the tense of the original sentence and the new subject.
| Tense | Common Forms of Be |
|---|---|
| Present Simple | am, is, are |
| Past Simple | was, were |
| Future Simple | will be |
| Present Continuous | am being, is being, are being |
| Past Continuous | was being, were being |
| Present Perfect | has been, have been |
| Past Perfect | had been |
| Future Perfect | will have been |
Example:
Active: The boy kicks the ball.
Passive: The ball is …
We use “is” because “the ball” is singular and the sentence is in the present simple tense.
Step 4: Use the Past Participle (V3) of the Main Verb
After choosing the correct form of be, change the main verb into its past participle (V3).
Examples of verb forms:
| Base Verb (V1) | Past Simple (V2) | Past Participle (V3) |
|---|---|---|
| write | wrote | written |
| eat | ate | eaten |
| make | made | made |
| teach | taught | taught |
| break | broke | broken |
| clean | cleaned | cleaned |
| build | built | built |
| send | sent | sent |
Example:
Active: The boy kicks the ball.
Passive: The ball is kicked …
The verb “kicks” changes to “is kicked.”
Step 5: Add “By” Before the Doer (When Necessary)
In passive voice, we can use by to introduce the person or thing performing the action. This person or thing is called the agent.
Example:
Active: The boy kicks the ball.
Passive: The ball is kicked by the boy.
However, the agent is not always necessary. We can omit it when the doer is unknown, unimportant, or already understood.
Example:
Active: Someone stole my phone.
Passive: My phone was stolen.
In this example, mentioning “by someone” is unnecessary.
Step 6: Check the Tense and Meaning
Finally, check that the passive sentence maintains the original tense and meaning.
Examples:
| Active Voice | Passive Voice |
|---|---|
| She writes a letter. | A letter is written by her. |
| He repaired the car. | The car was repaired by him. |
| They are painting the house. | The house is being painted by them. |
| The teacher has checked the papers. | The papers have been checked by the teacher. |
| The company will launch a product. | A product will be launched by the company. |
Notice that the tense remains the same, although the verb structure changes.
Quick Summary: Six Steps to Change Active Voice to Passive Voice
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Identify the subject, verb, and object.
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Move the object to the subject position.
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Choose the correct form of be.
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Change the main verb into its past participle (V3).
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Add by and the doer if necessary.
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Check the tense, subject-verb agreement, and meaning.
Remember: The most important formula for changing active voice to passive voice is:
Passive Voice = New Subject + Correct Form of Be + Past Participle (V3) + Optional Agent
By following these steps, you can convert many active sentences into passive voice correctly.
Rules for Changing Active Voice to Passive Voice
To change active voice to passive voice correctly, you need to understand the basic grammar rules. These rules explain how to change the position of the subject and object, select the correct verb form, and maintain the original meaning of the sentence.
Here are the most important active to passive voice rules with examples.
Rule 1: Change the Object into the Subject
The first rule is to move the object of the active sentence into the subject position in the passive sentence.
Active: The teacher explains the lesson.
Passive: The lesson is explained by the teacher.
In the active sentence, “the lesson” is the object. In the passive sentence, it becomes the subject.
Rule 2: Use the Correct Form of “Be”
Passive voice requires the correct form of the verb be, followed by the past participle of the main verb.
The form of be depends on the tense and the new subject.
Examples:
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Active: She cleans the room.
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Passive: The room is cleaned by her.
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Active: They cleaned the room.
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Passive: The room was cleaned by them.
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Active: They will clean the room.
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Passive: The room will be cleaned by them.
Rule 3: Use the Past Participle (V3) of the Main Verb
In passive voice, the main verb must be in its past participle form.
For regular verbs, the past participle usually ends in -ed. Irregular verbs have different past participle forms.
| Active Verb | Past Participle | Passive Example |
|---|---|---|
| write | written | The letter is written. |
| eat | eaten | The food is eaten. |
| build | built | The bridge was built. |
| clean | cleaned | The room is cleaned. |
| make | made | The cake was made. |
Remember: Do not use the base form or simple past form in place of the past participle.
Incorrect: The letter was wrote.
Correct: The letter was written.
Rule 4: Keep the Original Tense
When converting active voice into passive voice, the tense must remain the same.
Only the verb structure changes.
| Tense | Active Voice | Passive Voice |
|---|---|---|
| Present Simple | She writes a letter. | A letter is written by her. |
| Past Simple | She wrote a letter. | A letter was written by her. |
| Future Simple | She will write a letter. | A letter will be written by her. |
| Present Continuous | She is writing a letter. | A letter is being written by her. |
| Present Perfect | She has written a letter. | A letter has been written by her. |
For example, a past simple active sentence must remain in the past simple when changed into passive voice.
Rule 5: Change Subject Pronouns into Object Pronouns
When the subject of an active sentence becomes the agent after by, subject pronouns change into object pronouns.
| Subject Pronoun | Object Pronoun |
|---|---|
| I | me |
| We | us |
| You | you |
| He | him |
| She | her |
| It | it |
| They | them |
Examples:
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Active: He helped me.
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Passive: I was helped by him.
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Active: She invited us.
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Passive: We were invited by her.
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Active: They praised him.
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Passive: He was praised by them.
The object pronoun of the active sentence also changes to a subject pronoun when it becomes the new subject.
Rule 6: Use “By” Only When Necessary
The preposition by introduces the agent in passive voice. However, it is not always necessary to mention who performed the action.
Example 1: Agent Included
Active: Shakespeare wrote Hamlet.
Passive: Hamlet was written by Shakespeare.
The agent is important because it identifies the writer.
Example 2: Agent Omitted
Active: Someone broke the window.
Passive: The window was broken.
The agent is unknown or unimportant, so it can be omitted.
Rule 7: Change Modal Verbs Using “Be + V3”
When an active sentence contains a modal verb such as can, could, may, might, must, should, or would, use the following passive structure:
Modal Verb + Be + Past Participle (V3)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She can solve the problem. | The problem can be solved by her. |
| You should follow the rules. | The rules should be followed. |
| They must complete the work. | The work must be completed. |
| He might cancel the meeting. | The meeting might be canceled. |
| We could finish the project. | The project could be finished by us. |
For modal perfect constructions, use:
Modal + Have Been + Past Participle (V3)
Example:
Active: They should have completed the project.
Passive: The project should have been completed.
Rule 8: Change Negative Sentences Correctly
To change a negative active sentence into passive voice, place not after the first auxiliary verb in the passive construction.
Examples:
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Active: She does not write letters.
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Passive: Letters are not written by her.
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Active: They did not repair the road.
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Passive: The road was not repaired by them.
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Active: He will not complete the task.
-
Passive: The task will not be completed by him.
The negative meaning must remain unchanged.
Rule 9: Maintain the Correct Question Structure
When changing an active question into passive voice, maintain the interrogative structure.
In most passive questions, the first auxiliary verb comes before the subject.
Examples:
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Active: Did she write the letter?
-
Passive: Was the letter written by her?
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Active: Are they cleaning the room?
-
Passive: Is the room being cleaned by them?
-
Active: Will he finish the work?
-
Passive: Will the work be finished by him?
For questions beginning with who, the passive structure may use by whom when asking about the agent.
Example:
Active: Who wrote this book?
Passive: By whom was this book written?
In everyday English, “Who was this book written by?” is also common.
Rule 10: Understand Which Sentences Can Be Changed into Passive Voice
Not every active sentence can be converted into passive voice.
Most ordinary passive constructions are formed from verbs that take an object. These verbs are called transitive verbs.
Examples of Transitive Verbs:
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Active: She opened the door.
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Passive: The door was opened by her.
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Active: He bought a car.
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Passive: A car was bought by him.
Intransitive verbs do not take direct objects, so sentences containing only these verbs normally cannot be changed into passive voice.
Examples:
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The baby sleeps.
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The sun rises.
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He arrived late.
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They laughed.
These sentences do not have direct objects that can become passive subjects.
Important: Some verbs can be both transitive and intransitive, depending on how they are used. Certain prepositional verb constructions can also form passives, such as “The children were looked after.”
Quick Summary of Active to Passive Voice Rules
| Rule | What to Remember |
|---|---|
| 1. Object Placement | Move the active object into the subject position. |
| 2. Be Verb | Use the correct form of be. |
| 3. Past Participle | Use the V3 form of the main verb. |
| 4. Tense | Maintain the original tense. |
| 5. Pronouns | Change pronoun forms when necessary. |
| 6. Agent | Use by only when the agent is relevant. |
| 7. Modal Verbs | Use modal + be + V3. |
| 8. Negative Sentences | Place not after the first auxiliary verb. |
| 9. Questions | Maintain the correct interrogative structure. |
| 10. Verb Type | Check whether the verb construction allows a passive form. |
Understanding these rules will help you change active sentences into passive sentences accurately in different English tenses and sentence structures.
Active to Passive Voice Rules for All Tenses
Changing active voice to passive voice depends on the tense of the sentence. Each English tense has a different verb structure, so you must use the correct form of be and the past participle (V3) of the main verb.
The following active to passive voice rules for all tenses explain how to convert sentences in the present, past, and future tenses with formulas and examples.
1. Present Simple Tense: Active to Passive Voice
In the present simple tense, use am, is, or are followed by the past participle (V3).
Active Voice Formula:
Subject + V1 (s/es) + Object
Passive Voice Formula:
Object + Am/Is/Are + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She writes a letter. | A letter is written by her. |
| They clean the classroom. | The classroom is cleaned by them. |
| He teaches English. | English is taught by him. |
| The chef prepares meals. | Meals are prepared by the chef. |
| I wash the dishes. | The dishes are washed by me. |
Remember: Use is for singular subjects, are for plural subjects, and am with I.
2. Present Continuous Tense: Active to Passive Voice
In the present continuous tense, use am being, is being, or are being followed by the past participle.
Active Voice Formula:
Subject + Am/Is/Are + V-ing + Object
Passive Voice Formula:
Object + Am/Is/Are + Being + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She is writing a letter. | A letter is being written by her. |
| They are building a house. | A house is being built by them. |
| He is repairing the car. | The car is being repaired by him. |
| The workers are painting the walls. | The walls are being painted by the workers. |
| I am preparing dinner. | Dinner is being prepared by me. |
The word being is necessary to maintain the continuous aspect.
3. Present Perfect Tense: Active to Passive Voice
In the present perfect tense, use has been or have been followed by the past participle.
Active Voice Formula:
Subject + Has/Have + V3 + Object
Passive Voice Formula:
Object + Has/Have + Been + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She has completed the assignment. | The assignment has been completed by her. |
| They have repaired the road. | The road has been repaired by them. |
| He has written a book. | A book has been written by him. |
| The students have submitted their projects. | Their projects have been submitted by the students. |
| We have cleaned the rooms. | The rooms have been cleaned by us. |
Use has been with singular subjects and have been with plural subjects.
4. Present Perfect Continuous Tense: Active to Passive Voice
The present perfect continuous tense rarely appears in passive voice because its passive structure is long and awkward.
Theoretical Passive Formula:
Object + Has/Have + Been + Being + V3
Example:
Active: They have been repairing the road for two hours.
Passive: The road has been being repaired for two hours.
Although this passive construction is grammatically possible, it sounds unnatural in most situations.
A more natural alternative is:
The road has been under repair for two hours.
This alternative communicates a similar idea but is not an exact grammatical conversion.
5. Past Simple Tense: Active to Passive Voice
In the past simple tense, use was or were followed by the past participle.
Active Voice Formula:
Subject + V2 + Object
Passive Voice Formula:
Object + Was/Were + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She wrote a letter. | A letter was written by her. |
| They built a bridge. | A bridge was built by them. |
| He repaired the computer. | The computer was repaired by him. |
| The police arrested the thief. | The thief was arrested by the police. |
| We completed the project. | The project was completed by us. |
Use was with singular subjects and were with plural subjects.
6. Past Continuous Tense: Active to Passive Voice
In the past continuous tense, use was being or were being followed by the past participle.
Active Voice Formula:
Subject + Was/Were + V-ing + Object
Passive Voice Formula:
Object + Was/Were + Being + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She was writing a letter. | A letter was being written by her. |
| They were cleaning the classroom. | The classroom was being cleaned by them. |
| He was repairing the car. | The car was being repaired by him. |
| The workers were constructing a building. | A building was being constructed by the workers. |
| We were preparing the documents. | The documents were being prepared by us. |
The word being shows that the action was in progress at a particular time in the past.
7. Past Perfect Tense: Active to Passive Voice
In the past perfect tense, use had been followed by the past participle.
Active Voice Formula:
Subject + Had + V3 + Object
Passive Voice Formula:
Object + Had + Been + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She had written the report. | The report had been written by her. |
| They had completed the work. | The work had been completed by them. |
| He had repaired the machine. | The machine had been repaired by him. |
| The teacher had checked the papers. | The papers had been checked by the teacher. |
| We had finished the project. | The project had been finished by us. |
The structure had been + V3 remains the same for singular and plural subjects.
8. Past Perfect Continuous Tense: Active to Passive Voice
The past perfect continuous tense is rarely used in passive voice.
Theoretical Passive Formula:
Object + Had + Been + Being + V3
Example:
Active: They had been repairing the bridge for several weeks.
Passive: The bridge had been being repaired for several weeks.
This construction is grammatically possible but extremely uncommon.
A more natural alternative is:
The bridge had been under repair for several weeks.
9. Future Simple Tense: Active to Passive Voice
In the future simple tense, use will be followed by the past participle.
Active Voice Formula:
Subject + Will + V1 + Object
Passive Voice Formula:
Object + Will + Be + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She will write a letter. | A letter will be written by her. |
| They will build a hospital. | A hospital will be built by them. |
| He will repair the computer. | The computer will be repaired by him. |
| The company will launch a product. | A product will be launched by the company. |
| We will complete the project. | The project will be completed by us. |
The structure will be + V3 is the same for all subjects.
10. Future Continuous Tense: Active to Passive Voice
The future continuous tense rarely appears in passive voice because the passive structure is awkward.
Theoretical Passive Formula:
Object + Will + Be + Being + V3
Example:
Active: They will be repairing the road tomorrow.
Passive: The road will be being repaired tomorrow.
Although grammatically possible, this passive sentence is unnatural in everyday English.
A more natural alternative is:
The road will be under repair tomorrow.
11. Future Perfect Tense: Active to Passive Voice
In the future perfect tense, use will have been followed by the past participle.
Active Voice Formula:
Subject + Will + Have + V3 + Object
Passive Voice Formula:
Object + Will + Have + Been + V3 + (by + Subject)
Examples:
| Active Voice | Passive Voice |
|---|---|
| She will have completed the assignment. | The assignment will have been completed by her. |
| They will have built the bridge. | The bridge will have been built by them. |
| He will have repaired the car. | The car will have been repaired by him. |
| The team will have finished the project. | The project will have been finished by the team. |
| We will have prepared the documents. | The documents will have been prepared by us. |
The future perfect passive describes an action that will be completed before a particular time in the future.
12. Future Perfect Continuous Tense: Active to Passive Voice
The future perfect continuous tense is almost never used in passive voice.
Its theoretical structure is:
Object + Will + Have + Been + Being + V3
Example:
Active: They will have been repairing the bridge for six months by December.
The theoretical passive form would be:
The bridge will have been being repaired for six months by December.
This construction is extremely awkward and should generally be avoided.
A more natural alternative is:
By December, the bridge will have been under repair for six months.
Active to Passive Voice Rules for All Tenses: Summary Table
The following table summarizes the main passive voice structures used in English.
| English Tense | Passive Voice Formula |
|---|---|
| Present Simple | am/is/are + V3 |
| Present Continuous | am/is/are + being + V3 |
| Present Perfect | has/have + been + V3 |
| Present Perfect Continuous | has/have + been + being + V3 (rare) |
| Past Simple | was/were + V3 |
| Past Continuous | was/were + being + V3 |
| Past Perfect | had + been + V3 |
| Past Perfect Continuous | had + been + being + V3 (rare) |
| Future Simple | will + be + V3 |
| Future Continuous | will + be + being + V3 (rare) |
| Future Perfect | will + have + been + V3 |
| Future Perfect Continuous | will + have + been + being + V3 (extremely rare) |
Important Grammar Note: The perfect continuous and future continuous passive constructions shown above are theoretically possible, but they are rarely used in natural English. In everyday speaking and writing, it is usually better to rewrite these sentences using clearer and more natural expressions.
For most English learners, the priority should be mastering the commonly used passive structures in the simple, continuous, and perfect tenses.
How to Change Negative Sentences into Passive Voice
Changing negative sentences from active voice to passive voice follows the same basic rules as affirmative sentences. However, you must keep the negative meaning by placing not after the first auxiliary verb in the passive construction.
In active voice, negative sentences often use helping verbs such as do not, does not, did not, has not, have not, and will not. When changing these sentences into passive voice, the helping verbs must be adjusted according to the tense.
Rules for Changing Negative Active Voice to Passive Voice
Follow these steps to convert negative sentences correctly:
-
Identify the subject, verb, and object in the active sentence.
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Move the object into the subject position.
-
Choose the correct form of be according to the tense.
-
Place not after the first auxiliary verb.
-
Use the past participle (V3) of the main verb.
-
Add by and the agent if necessary.
Example:
Active: She does not clean the room.
Passive: The room is not cleaned by her.
In this example, “does not clean” changes to “is not cleaned.” The sentence remains in the present simple tense.
1. Present Simple Negative Sentences
Active Voice Formula:
Subject + Do/Does + Not + V1 + Object
Passive Voice Formula:
Object + Am/Is/Are + Not + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She does not write letters. | Letters are not written by her. |
| They do not clean the rooms. | The rooms are not cleaned by them. |
| He does not repair computers. | Computers are not repaired by him. |
| The teacher does not check the homework. | The homework is not checked by the teacher. |
2. Past Simple Negative Sentences
Active Voice Formula:
Subject + Did + Not + V1 + Object
Passive Voice Formula:
Object + Was/Were + Not + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She did not write the letter. | The letter was not written by her. |
| They did not complete the project. | The project was not completed by them. |
| He did not repair the car. | The car was not repaired by him. |
| The workers did not paint the walls. | The walls were not painted by the workers. |
3. Present Continuous Negative Sentences
Active Voice Formula:
Subject + Am/Is/Are + Not + V-ing + Object
Passive Voice Formula:
Object + Am/Is/Are + Not + Being + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She is not writing a letter. | A letter is not being written by her. |
| They are not cleaning the classroom. | The classroom is not being cleaned by them. |
| He is not repairing the machine. | The machine is not being repaired by him. |
4. Present Perfect Negative Sentences
Active Voice Formula:
Subject + Has/Have + Not + V3 + Object
Passive Voice Formula:
Object + Has/Have + Not + Been + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She has not completed the assignment. | The assignment has not been completed by her. |
| They have not repaired the road. | The road has not been repaired by them. |
| He has not submitted the report. | The report has not been submitted by him. |
5. Future Simple Negative Sentences
Active Voice Formula:
Subject + Will + Not + V1 + Object
Passive Voice Formula:
Object + Will + Not + Be + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She will not write the letter. | The letter will not be written by her. |
| They will not build the bridge. | The bridge will not be built by them. |
| He will not complete the task. | The task will not be completed by him. |
6. Negative Sentences with Modal Verbs
When a negative active sentence contains a modal verb, use the following structure:
Passive Voice Formula:
Object + Modal Verb + Not + Be + V3 + (by + Subject)
| Active Voice | Passive Voice |
|---|---|
| She cannot solve the problem. | The problem cannot be solved by her. |
| You should not ignore the rules. | The rules should not be ignored. |
| They must not open the door. | The door must not be opened. |
| He may not attend the meeting. | The meeting may not be attended by him. |
Common Mistakes in Negative Passive Voice
Mistake 1: Using “do not” or “does not” with a passive main verb
Incorrect: The room does not cleaned.
Correct: The room is not cleaned.
Mistake 2: Forgetting “being” in continuous passive sentences
Incorrect: The car is not repaired by him right now.
Correct: The car is not being repaired by him right now.
The first sentence can be grammatical in a different context, but it does not express the intended present continuous meaning.
Mistake 3: Using the wrong past participle
Incorrect: The letter was not wrote.
Correct: The letter was not written.
Mistake 4: Placing “not” incorrectly
Incorrect: The project has been not completed.
Correct: The project has not been completed.
Quick Practice: Change Negative Active Voice to Passive Voice
Convert the following sentences into passive voice.
-
She does not prepare breakfast.
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They did not repair the road.
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He is not writing the report.
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The students have not completed the assignment.
-
The company will not launch the product.
Answers:
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Breakfast is not prepared by her.
-
The road was not repaired by them.
-
The report is not being written by him.
-
The assignment has not been completed by the students.
-
The product will not be launched by the company.
Remember: When changing negative active sentences into passive voice, always maintain the original tense and negative meaning. Use the correct auxiliary verb, place not after the first auxiliary, and keep the main verb in its past participle form.
How to Change Questions into Passive Voice
Changing questions from active voice to passive voice requires a few adjustments to the sentence structure. Unlike affirmative sentences, questions usually begin with an auxiliary verb or a question word such as what, who, when, where, or why.
To change an active voice question into passive voice, move the object into the subject position, use the correct passive verb structure, and maintain the original question form.
Rules for Changing Active Voice Questions to Passive Voice
Follow these steps to convert interrogative sentences into passive voice:
-
Identify the subject, verb, and object of the active question.
-
Move the object into the subject position.
-
Use the correct form of be according to the tense.
-
Change the main verb into its past participle (V3).
-
Place the first auxiliary verb before the subject in yes/no questions.
-
Keep the question word when necessary.
-
Add by and the agent if they are important.
Example:
Active: Did she write the letter?
Passive: Was the letter written by her?
In this example, “the letter” becomes the subject, and “did write” changes to “was written.”
1. Changing Yes/No Questions into Passive Voice
Yes/no questions usually begin with auxiliary verbs such as do, does, did, is, are, has, have, or will.
When converting these questions, the passive sentence must also begin with the appropriate auxiliary verb.
Examples:
| Active Voice | Passive Voice |
|---|---|
| Does she write letters? | Are letters written by her? |
| Do they clean the classroom? | Is the classroom cleaned by them? |
| Did he repair the car? | Was the car repaired by him? |
| Is she preparing dinner? | Is dinner being prepared by her? |
| Have they completed the project? | Has the project been completed by them? |
| Will he finish the work? | Will the work be finished by him? |
Remember: The auxiliary verbs do, does, and did are replaced by the appropriate form of be in simple-tense passive questions.
2. Changing WH-Questions into Passive Voice
WH-questions begin with question words such as what, when, where, why, who, and how.
When changing these questions into passive voice, the question word usually remains at the beginning of the sentence.
Examples:
| Active Voice | Passive Voice |
|---|---|
| When did they build the bridge? | When was the bridge built? |
| Why did she cancel the meeting? | Why was the meeting canceled? |
| Where did they find the documents? | Where were the documents found? |
| How did he solve the problem? | How was the problem solved? |
| What did she write? | What was written by her? |
The passive question must preserve the meaning and tense of the active question.
3. Changing Questions Beginning with “Who”
Questions beginning with who require special attention because who may refer to the person performing the action or the person receiving it.
When who is the subject performing the action, the passive question can use by whom to ask about the agent.
Examples:
Active: Who wrote this book?
Passive: By whom was this book written?
Active: Who broke the window?
Passive: By whom was the window broken?
Active: Who painted the picture?
Passive: By whom was the picture painted?
Important: By whom is more formal. In everyday English, it is common to place by at the end of the question.
For example:
-
Who was this book written by?
-
Who was the window broken by?
-
Who was the picture painted by?
Both structures are grammatically acceptable.
4. Changing Present Continuous Questions into Passive Voice
For present continuous questions, use am, is, or are followed by being and the past participle.
Passive Voice Formula:
Am/Is/Are + Object + Being + V3 + (by + Subject)?
Examples:
| Active Voice | Passive Voice |
|---|---|
| Is she writing a letter? | Is a letter being written by her? |
| Are they repairing the road? | Is the road being repaired by them? |
| Is he cleaning the room? | Is the room being cleaned by him? |
| Are the workers painting the walls? | Are the walls being painted by the workers? |
5. Changing Past Simple Questions into Passive Voice
For past simple questions, use was or were followed by the past participle.
Passive Voice Formula:
Was/Were + Object + V3 + (by + Subject)?
Examples:
| Active Voice | Passive Voice |
|---|---|
| Did she write the report? | Was the report written by her? |
| Did they complete the work? | Was the work completed by them? |
| Did he break the glass? | Was the glass broken by him? |
| Did the teacher check the papers? | Were the papers checked by the teacher? |
6. Changing Questions with Modal Verbs into Passive Voice
When a question contains a modal verb such as can, could, should, may, might, or must, use the following structure:
Passive Voice Formula:
Modal Verb + Object + Be + V3 + (by + Subject)?
Examples:
| Active Voice | Passive Voice |
|---|---|
| Can she solve the problem? | Can the problem be solved by her? |
| Should we follow these rules? | Should these rules be followed? |
| Must they complete the task? | Must the task be completed? |
| Could he repair the computer? | Could the computer be repaired by him? |
| Will they announce the results? | Will the results be announced? |
7. Changing Negative Questions into Passive Voice
Negative questions can also be changed into passive voice. The negative meaning must remain the same.
Examples:
| Active Voice | Passive Voice |
|---|---|
| Doesn’t she clean the room? | Isn’t the room cleaned by her? |
| Didn’t they repair the road? | Wasn’t the road repaired by them? |
| Hasn’t he completed the assignment? | Hasn’t the assignment been completed by him? |
| Won’t they finish the project? | Won’t the project be finished by them? |
In formal writing, negative questions can also use uncontracted forms such as “Is the room not cleaned by her?”
Common Mistakes When Changing Questions into Passive Voice
Mistake 1: Using “did” with the passive verb
Incorrect: Did the letter was written by her?
Correct: Was the letter written by her?
Mistake 2: Using the wrong auxiliary verb
Incorrect: Were the car repaired by him?
Correct: Was the car repaired by him?
Mistake 3: Forgetting “being” in continuous questions
Incorrect: Is the room cleaned by them right now?
Correct: Is the room being cleaned by them right now?
The first sentence may be grammatical when asking about a habitual action, but it does not express the intended ongoing action.
Mistake 4: Using the base verb instead of the past participle
Incorrect: Was the book write by him?
Correct: Was the book written by him?
Practice Exercises: Change Questions into Passive Voice
Change the following active voice questions into passive voice.
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Does she teach English?
-
Did they build the hospital?
-
Is he repairing the computer?
-
Have the students submitted their assignments?
-
Will the company announce the results?
-
Who wrote this poem?
-
Why did they cancel the event?
-
Can she complete the project?
Answers:
-
Is English taught by her?
-
Was the hospital built by them?
-
Is the computer being repaired by him?
-
Have the assignments been submitted by the students?
-
Will the results be announced by the company?
-
By whom was this poem written?
-
Why was the event canceled?
-
Can the project be completed by her?
Remember: To change an active voice question into passive voice, maintain the question structure, use the correct auxiliary verb, and change the main verb into its past participle form. For yes/no questions, the first auxiliary verb normally comes before the passive subject.
How to Change Imperative Sentences into Passive Voice
Imperative sentences are used to give commands, instructions, requests, advice, or warnings. These sentences usually begin with the base form of a verb, and the subject you is understood rather than directly stated.
Changing imperative sentences from active voice to passive voice is slightly different from changing ordinary statements. A traditional grammar transformation uses let + object + be + past participle (V3). However, this structure can sound formal or unnatural in everyday English, so other passive constructions are often more appropriate.
Rules for Changing Imperative Sentences into Passive Voice
To convert an affirmative imperative sentence into a traditional passive construction, follow these steps:
-
Identify the main verb and its object.
-
Begin the passive sentence with let.
-
Place the object after let.
-
Add be followed by the past participle (V3).
-
Keep the original instruction or command meaning.
Active Voice Formula:
Base Verb (V1) + Object
Traditional Passive Voice Formula:
Let + Object + Be + Past Participle (V3)
Example:
Active: Open the door.
Passive: Let the door be opened.
In this example, “the door” becomes the focus of the passive sentence, while “open” changes to “be opened.”
1. Changing Commands into Passive Voice
Commands are imperative sentences used to tell someone to do something.
In traditional grammar exercises, commands can be changed using let + object + be + V3.
| Active Voice | Passive Voice |
|---|---|
| Open the door. | Let the door be opened. |
| Close the windows. | Let the windows be closed. |
| Clean the classroom. | Let the classroom be cleaned. |
| Complete the assignment. | Let the assignment be completed. |
| Repair the machine. | Let the machine be repaired. |
Important: Although these conversions are grammatically possible, they often sound formal or indirect. In everyday instructions, the original active commands are usually clearer.
2. Changing Instructions into Passive Voice
Instructions explain how a task should be performed. They are common in manuals, recipes, classroom activities, and workplace procedures.
In practical English, passive instructions often use should be, must be, or a present simple passive construction.
Examples:
| Active Instruction | Natural Passive Alternative |
|---|---|
| Wash the vegetables. | The vegetables should be washed. |
| Check the documents. | The documents must be checked. |
| Mix the ingredients. | The ingredients should be mixed. |
| Submit the application. | The application must be submitted. |
| Turn off the lights. | The lights should be turned off. |
These alternatives express instructions or requirements, but they may change the strength of the original command. For example, must be expresses a stronger obligation than should be.
3. Changing Polite Requests into Passive Voice
Polite requests often begin with expressions such as please, could you, or would you.
Instead of using the formal let construction, we can use passive questions or statements to make the request sound more natural.
Examples:
| Active Request | Passive Alternative |
|---|---|
| Please complete the form. | The form should be completed, please. |
| Could you send the report? | Could the report be sent? |
| Would you check the details? | Could the details be checked? |
| Please submit the documents. | Please ensure that the documents are submitted. |
Note: These examples are natural passive alternatives rather than exact word-for-word transformations. They may differ slightly in politeness, emphasis, or obligation.
4. Changing Negative Imperative Sentences into Passive Voice
Negative imperative sentences tell someone not to perform an action. They usually begin with do not or don’t.
A traditional passive transformation uses the following structure:
Negative Passive Formula:
Let + Object + Not + Be + Past Participle (V3)
Example:
Active: Do not open the door.
Passive: Let the door not be opened.
This construction is grammatically possible but uncommon in modern everyday English.
A more natural alternative is:
The door must not be opened.
Additional examples:
| Active Voice | Passive Alternative |
|---|---|
| Do not touch the wires. | The wires must not be touched. |
| Do not open the box. | The box must not be opened. |
| Do not waste water. | Water must not be wasted. |
| Do not remove the documents. | The documents must not be removed. |
| Do not enter the room. | Entry into the room is prohibited. |
The final example is a natural reformulation rather than a direct passive conversion because enter takes “the room” as its object in the original sentence, while the alternative uses a noun phrase.
5. Changing Imperative Sentences with “Let”
Some active imperative sentences already contain let. These require special attention because let can express permission or a suggestion.
Example:
Active: Let him complete the work.
A natural passive alternative is:
He should be allowed to complete the work.
This sentence expresses permission or opportunity, rather than simply changing the original command into a passive structure.
Similarly:
Active: Let her speak.
Passive alternative: She should be allowed to speak.
Remember: Imperatives containing let do not always follow the ordinary imperative conversion formula. Their meaning must be considered before rewriting them.
Imperative Active to Passive Voice Examples
Here is a quick comparison of common imperative sentences and their passive alternatives.
| Active Voice | Passive Alternative |
|---|---|
| Write the answer. | Let the answer be written. |
| Read the instructions. | The instructions should be read. |
| Finish the work. | Let the work be finished. |
| Clean the kitchen. | The kitchen must be cleaned. |
| Follow the rules. | The rules must be followed. |
| Do not break the glass. | The glass must not be broken. |
| Please check the report. | Please ensure that the report is checked. |
| Submit the application. | The application must be submitted. |
Common Mistakes When Changing Imperative Sentences into Passive Voice
Mistake 1: Forgetting “be” after “let”
Incorrect: Let the door opened.
Correct: Let the door be opened.
Mistake 2: Using the base verb instead of the past participle
Incorrect: Let the letter be write.
Correct: Let the letter be written.
Mistake 3: Using “being” unnecessarily
Incorrect: Let the room being cleaned.
Correct: Let the room be cleaned.
Mistake 4: Assuming every imperative has a natural passive form
Active: Sit down.
This sentence does not have a direct object that can become the subject of a standard passive construction.
You may rewrite the instruction as “You are requested to sit down,” but this is not a direct grammatical conversion of the original verb.
Practice Exercises: Change Imperative Sentences into Passive Voice
Change the following imperative sentences into passive voice using the traditional let structure where possible.
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Open the window.
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Clean the classroom.
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Write the report.
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Complete the assignment.
-
Repair the computer.
-
Close the gate.
-
Wash the dishes.
-
Read the instructions.
Answers:
-
Let the window be opened.
-
Let the classroom be cleaned.
-
Let the report be written.
-
Let the assignment be completed.
-
Let the computer be repaired.
-
Let the gate be closed.
-
Let the dishes be washed.
-
Let the instructions be read.
Remember: In traditional grammar exercises, affirmative imperative sentences can often be converted using let + object + be + V3. However, in natural English, passive constructions with should be, must be, or other suitable expressions are often clearer. Always choose the structure that preserves the intended meaning of the instruction.
Conclusion
Active and passive forms of voices are used frequently in English language communication. Active voice is the direct voice where the subject performs an action. In passive form, subject is not important but action and the object becomes important.
To make passive voice, we use two forms of verbs; a conjugated form of verb “to be” and the past participle form of the main verb. In passive form, the object is the main focus of the sentence.
I hope this article helped you to learn active and passive forms of different tenses. If you like this article, then please share and subscribe to our newsletter for language learning tips and the latest blog posts.