Compound-Complex Sentence Worksheets: Exercises with Answers (PDF)

Looking to make your writing more interesting? These Compound-Complex Sentence Worksheets are just what you need! With clear and practical activities, you’ll practice joining ideas smoothly and logically. Whether you’re combining short sentences or building longer ones with more detail, these worksheets will help you write with confidence.

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Worksheet 1: Combine the Clauses

Combine the following clauses into a compound-complex sentence using correct punctuation and conjunctions. Each sentence should include at least two independent clauses and one dependent clause.

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Sample Answer Key

1. Because the exam was difficult, she studied all night, but she still felt nervous.
2. Although the sun was shining earlier, it started raining, so we didn’t go to the beach.
3. While we’re on vacation, I enjoy hiking, but my brother prefers biking.
4. After his guests left, he cleaned the kitchen, and he vacuumed the floor.
5. Though I checked my phone later, I was in a meeting, and I missed your call.
6. They stayed up late, and they finished their science project because it was due the next day.
7. If your homework is finished, you can come with us, or you can stay home.
8. Since we planned a picnic, she brought snacks, and he brought drinks.

Worksheet 2: Identify Compound-Complex Sentences

Read each sentence carefully. If it is a compound-complex sentence, write ✔ Yes. If not, write ✘ No.

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Compound-Complex Sentence Exercises

Exercise 1: Fill in the Blanks

Direction: Fill in each blank with the correct coordinating or subordinating conjunction from the word bank.

Word Bank: although · because · while · if · when · so · but · and · or · even though · unless

1. I couldn’t sleep last night ______ I had too much coffee, ______ I still woke up early.
2. She wanted to go outside ______ it was snowing, ______ her mom told her to wait.
3. We can visit the museum ______ it’s open, ______ we might go to the zoo instead.
4. He studied hard for the test ______ he wanted to get a good grade, ______ he was nervous.
5. I was doing my homework ______ my sister was watching TV, ______ I managed to finish.
6. You won’t improve ______ you practice every day, ______ you’ll fall behind.
7. ______ it was late, we kept talking, ______ we were both tired.

Answer Key

1. because / but
2. even though / but
3. if / or
4. because / but
5. while / but
6. unless / so
7. Although / even though

Exercise 2: Correct the Mistake

Direction: Rewrite each sentence so it forms a correct compound-complex sentence.

1. Although she was late, but she still finished the exam on time, and she didn’t complain.
2. I went to the store and I forgot my wallet, because I was rushing.
3. He likes football, he doesn’t enjoy playing in the rain if it’s cold.
4. When I called her, and she didn’t answer the phone, I left a message.
5. Unless you leave now, you will miss the train, and it will be your fault.
6. While we were eating dinner we heard a loud noise, and the dog started barking.
7. They stayed inside because it rained, but played video games all day.
8. If you study hard, and you focus, you can pass the test, you will feel more confident.

Answer Key

1. Although she was late, she still finished the exam on time, and she didn’t complain.
2. I went to the store, but I forgot my wallet because I was rushing.
3. He likes football, but he doesn’t enjoy playing in the rain if it’s cold.
4. When I called her, she didn’t answer the phone, and I left a message.
5. Unless you leave now, you will miss the train, and it will be your fault.
6. While we were eating dinner, we heard a loud noise, and the dog started barking.
7. They stayed inside because it rained, and they played video games all day.
8. If you study hard and focus, you can pass the test, and you will feel more confident.

Learn more: Compound-Complex Sentence