What Part of Speech is Is?

by | Jun 14, 2025 | Parts of Speech

The word is may seem small and simple, but it plays a big role in English grammar. If you are learning English, you probably see and hear the word is in almost every conversation or sentence. But what exactly is it doing there?

In this article, I will explain what part of speech is belongs to, how it works in a sentence, and how to use it correctly with easy examples and clear explanations.

Table of Contents

What part of speech is “is”?

Learning how to use the word “is” is essential if you want to speak and write English correctly. Even though it’s just two letters long, the word “is” connects ideas, describes situations, and helps us to build many types of sentences.

Is as a Verb

“Is” is a form of to be in the present tense, and it is used when talking about someone or something that is happening now.

1. “Is” as a Linking Verb

A linking verb connects the subject of the sentence with a condition, state, or description.

For example:

  • She is happy.
  • The sky is blue.
  • This is my phone.

In each case, “is” connects the subject to something that describes or identifies it.

2. “Is” as a Helping (Auxiliary) Verb

Sometimes, “is” is used with another verb to form a sentence. This is when it acts as a helping verb.

For example:

  • She is studying for her exam.
  • It is raining outside.
  • He is working late tonight.

Here, “is” helps the -ing verb show that the action is happening right now (present continuous tense).

The Role of “Is” in the Verb “to be”

Forms of the Verb “To Be”

The verb to be changes depending on the subject and the tense.

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Is Examples 

As a linking veb

  • My neice is her class’s valedictorian.
  • Our library book is overdue.
  • The bear is brown
  • Language Arts is my favorite class.

As an auxiliary verb

  • It is supposed to rain tonight.
  • My mother is training for a 5k.
  • As I recall the story, he is remembering the details.
  • My PC is running a new Linux distro.

Examples of “Is” in Sentences

In positive sentences:

  • He is my best friend.
  • This is very easy.
  • She is ready to go.

To make questions or negatives, simply change the word order or add not.

  • Is he coming?
  • She is not home.
  • Is it true?

You can also use the contraction isn’t in place of is not.

Frequently Asked Questions

Is the word “is” a verb or a helping verb?

It can be both. Here is an example:

  • As a main verb: She is smart.
  • As a helping verb: She is dancing.

What tense is “is”?

“Is” is the present tense form of “to be” for singular subjects.

Can “is” be used in passive voice?

Yes. For example:

  • The project is completed on time.

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