Sentences are the building blocks of writing. Once you know the basics of sentences, you are ready to take your writing to the next level. Compound-complex sentences let you combine multiple ideas in a single, clear sentence.
In this article, you will learn what compound-complex sentences are, how to form them, and examples of sentences using compound-complex sentences in everyday English.
A compound-complex sentence is a sentence that contains:
- At least two independent clauses
- At least one dependent clause
A compound-complex sentence joins two or more independent clauses with one or more dependent clauses to express related ideas clearly.
Examples:
- Although it was raining, we went for a walk, and we enjoyed the fresh air.
- I went to the store, and I bought some fruit because I was hungry.
Parts of a Compound-Complex Sentence
A compound complex sentence includes three parts: an independent clause, a dependent clause, and a conjunction to join these two types of clauses in the sentence.
1. Independent Clauses
An independent clause has a subject and a verb and expresses a complete thought.
For example:
- The children played outside.
2. Dependant Clauses
A dependent (subordinate) clause also has a subject and a verb, but cannot stand alone.
For example:
- Because the sun was shining.
3. Conjunctions
Conjunctions are words that join clauses in a sentence. The primary purpose of using conjunctions is to create logical flow by connecting ideas with conjunction words. With that said, there are two types of conjunctions used in compound-complex sentences, and they are:
Coordinating conjunctions are: for, and, nor, but, or, yet, so. While subordinating conjunctions are: because, although, since, when, if, while, etc.
Examples:
- She stayed home because she was tired, but she finished her homework later.
How to Form a Compound-Complex Sentence
In compound-complex sentences, we join independent and dpentend cluases.
1. Start with two independent clauses.
- I finished my homework.
- I watched a movie.
2. Add a dependent clause to give extra information.
- Because I had no other plans.
3. Join them using the right conjunctions and punctuation.
- Because I had no other plan, I finished my homework, and I watched a movie.
Place commas after an opening dependent clause, use a comma before coordinating conjunctions (and, but, so, etc.) joining two independent clauses, and avoid run-on sentences by punctuating correctly.
Examples of Compound-Complex Sentences
- Although the teacher was late, the students waited patiently, and they reviewed their notes.
- I missed the bus because I overslept, but my friend gave me a ride.
- While I enjoy travelling, I don’t like long flights, and I prefer to drive when I can.
- She smiled when she saw the flowers, and she thanked him for the thoughtful gift.
Common Mistakes to Avoid
1. Run-on Sentences
One of the errors that occurs while making compound-complex sentences is the creation of run-on sentences, which occur when two independent clauses are joined together without using any punctuation or a connector.
For example:
- I was tired I went to bed early. (Incorrect)
- I was tired, so I went to bed early. (Correct)
Missing Comma After an Introductory Clause
When a sentence begins with a dependent clause, it should be followed by a comma.
For example:
- When the sun set we went home. (Incorrect)
- When the sun set, we went home. (correct)
Confusing dependent with independent clauses
A dependent clause cannot stand alone. It must be attached to an independent clause.
For example:
- Because it was raining. (incorrect)
- Because it was raining, we stayed inside. (correct)
Conclusion
A compound-complex sentence combines the strength of compound sentences and the depth of complex sentences.
FAQs about Compound-Complex Sentences
What is the easiest way to identify a compound-complex sentence?
The easiest way to identify a compound complex sentence is to look for two or more independent clauses plus at least one dependent clause.
How many clauses can it have?
A compound complex sentence contains at least three clauses (two independent clauses + one dependent clause). However, it can have more.
Can I start a compound complex sentence with a conjunction?
Yes. You can start a compound complex sentence with a conjunction, but punctuate it correctly.
I hope this article helped you learn what compound-complex sentences are, how to form them, and how they differ from simple, complex, and compound sentences. Â
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