Build Better Sentences: Simple, Compound & Complex for Grade 3 

This Grade 3 worksheet helps students understand how sentences can be formed in different ways—simple, compound, and complex—to express ideas clearly and effectively. Designed for young learners, it introduces how one idea can stand alone, how two ideas can be joined, and how reasons or time clues can be added using connectors like and, but, because, when, and although. Through step-by-step practice, students learn to recognise, build, and confidently use all three sentence types in writing. 

Why Sentence Types Matter in Grammar? 

Learning simple, compound, and complex sentences is important for Grade 3 students because simple sentences help express one clear idea, compound sentences show how two ideas are joined using words like and or but, complex sentences explain reasons, time, or conditions using words like because and when, and using different sentence types makes writing more interesting and meaningful. 

What’s Inside This Worksheet? 

This worksheet includes five well-structured activities to strengthen sentence-building skills: 

✏️ Exercise 1 – Identify Sentence Types 
Students underline simple sentences, circle compound sentences, and highlight complex sentences in a mixed set. Example: “She smiled when she saw her mother.” 

🧠 Exercise 2 – Multiple Choice Identification 
Students choose whether each sentence is simple, compound, or complex, reinforcing recognition of sentence structure. 

✍️ Exercise 3 – Sentence Rewriting 
Learners rewrite word groups into clear simple, compound, or complex sentences, focusing on correct structure and connectors. 

📝 Exercise 4 – Fill in the Blanks (Passage-Based) 
Students complete a story by adding suitable words to form different sentence types in context, improving fluency and understanding. 

📖 Exercise 5 – Paragraph Writing 
Students write a paragraph on “Helping My Mother with Household Chores” using a mix of simple, compound, and complex sentences. 

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ANSWER KEY
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Exercise 1 – Identify Sentence Types 
1. Simple 
2. Complex 
3. Compound 
4. Simple 
5. Simple 
6. Compound 
7. Complex 
8. Simple 
9. Compound 
10. Complex 

Exercise 2 – Multiple Choice 
1. c) This is a simple sentence. 
2. b) This is a compound sentence. 
3. b) This is a complex sentence. 
4. c) This is a compound sentence. 
5. a) This is a simple sentence. 
6. b) This is a complex sentence. 
7. a) This is a compound sentence. 
8. a) This is a complex sentence. 
9. b) This is a compound sentence. 
10. a) This is a complex sentence. 

Exercise 3 – Sentence Rewriting (Sample Answers) 
1. I was running to the park. 
2. Although it was raining, we played. 
3. Riya draws and she paints. 
4. The boy read and then he slept. 
5. When the teacher came, the class became silent. 
6. Neha is reading a story. 
7. Raj was tired because he worked hard. 
8. Asha sings loudly. 
9. The dog barked and the cat ran away. 
10. After the movie ended, we went home. 

Exercise 4 – Fill in the Blanks (Sample Answers) 
got ready, and, because, and, and, and, because, and, and, but, and, and, because 

Exercise 5 – Paragraph Writing 
Answers may vary.

Help your child grow into a confident writer by mastering sentence types with this Grade 3 worksheet. 
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