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Complex Sentences worksheet for students to practice identifying main clauses in sentences.

Worksheet titled "Complex Sentences" with instructions to underline the main clause in each sentence, featuring a cartoon owl and a child reading a book.

Worksheet titled "Complex Sentences" with instructions to underline the main clause in each sentence, featuring a cartoon owl and a child reading a book.

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Show Answer Key & Explanations Step-by-step solution for: Complex Sentence Worksheets | Free English Worksheets
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Task:


Underline the main clause in each sentence.

A complex sentence has:
- One main clause (independent clause) – can stand alone as a complete sentence.
- One or more subordinate clauses (dependent clauses) – cannot stand alone; they depend on the main clause.

We need to identify and underline the main clause in each sentence.

---

1. Even though he liked soccer, he never played it with his friends.



- Subordinate clause: *"Even though he liked soccer"* (starts with "even though" – dependent)
- Main clause: *"he never played it with his friends"* → This can stand alone.

Main clause: *he never played it with his friends*

---

2. He played on the computer after he ate dinner.



- Subordinate clause: *"after he ate dinner"* (starts with "after" – dependent)
- Main clause: *"He played on the computer"* → Can stand alone.

Main clause: *He played on the computer*

---

3. Ever since he lived in the new house, he has made it to work on time.



- Subordinate clause: *"Ever since he lived in the new house"* (time expression starting with "ever since" – dependent)
- Main clause: *"he has made it to work on time"* → Independent.

Main clause: *he has made it to work on time*

---

4. Becca never has desert until her father has had some.



- Subordinate clause: *"until her father has had some"* (starts with "until" – dependent)
- Main clause: *"Becca never has desert"* → Can stand alone.

Main clause: *Becca never has desert*

---

5. Simon bought a new car because he got a pay rise.



- Subordinate clause: *"because he got a pay rise"* (reason, dependent)
- Main clause: *"Simon bought a new car"* → Independent.

Main clause: *Simon bought a new car*

---

6. When houses get cheaper, I'm going to buy one.



- Subordinate clause: *"When houses get cheaper"* (time condition, dependent)
- Main clause: *"I'm going to buy one"* → Can stand alone.

Main clause: *I'm going to buy one*

---

7. Trish decided to quit baseball because she wasn't very good.



- Subordinate clause: *"because she wasn't very good"* (reason, dependent)
- Main clause: *"Trish decided to quit baseball"* → Independent.

Main clause: *Trish decided to quit baseball*

---

8. Mandy couldn't have any food until she finished her homework.



- Subordinate clause: *"until she finished her homework"* (time condition, dependent)
- Main clause: *"Mandy couldn't have any food"* → Independent.

Main clause: *Mandy couldn't have any food*

---

Final Answer:



Underline the following main clauses:

1. he never played it with his friends
2. He played on the computer
3. he has made it to work on time
4. Becca never has desert
5. Simon bought a new car
6. I'm going to buy one
7. Trish decided to quit baseball
8. Mandy couldn't have any food

> 💡 Tip: The main clause is usually the part that makes sense on its own. Look for the subject and verb that form a complete thought. Dependent clauses often start with words like *because, when, after, although, even though, until,* etc.

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Parent Tip: Review the logic above to help your child master the concept of complex sentence worksheet 3rd grade.
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