Join the Ideas: Conjunctions (and, but, because) for Class 3

This Class 3 worksheet on Conjunctions (and, but, because) helps learners understand how to join clauses correctly to form meaningful sentences. Students practise identifying when to add information using “and,” show contrast using “but,” and explain reasons using “because.” Through fill-in-the-blanks, true/false analysis, multiple choice questions, sentence correction, and sentence writing, children build strong foundational grammar skills.

Why Conjunctions Matter in Grammar?

Conjunctions help connect ideas smoothly and clearly. This concept is important in Grade 3 because: 
1. It teaches students how to join two related clauses correctly. 
2. It builds understanding of addition (and), contrast (but), and reason (because). 
3. It prevents confusing or incomplete sentences. 
4. It strengthens both written expression and speaking fluency.

What’s Inside This Worksheet?

This worksheet includes five structured exercises to build mastery step by step:

🧠 Exercise 1 – Fill in the Blanks 
Students complete sentences using the correct conjunction from the given word bank (and, but, because).

✏️ Exercise 2 – True or False 
Learners read each sentence carefully and decide whether the conjunction is used correctly.

📋 Exercise 3 – Multiple Choice Questions 
Students choose the best conjunction (a, b, or c) to complete each sentence accurately.

📝 Exercise 4 – Replace the Incorrect Word 
Children replace one incorrect conjunction with the correct one (and, but, or because).

📖 Exercise 5 – Sentence Writing 
Students write five original sentences using “and,” “but,” and “because.”

ANSWER KEY (For Parents & Educators)

Exercise 1 – Fill in the Blanks 
1. because 
2. but 
3. and 
4. but 
5. because 
6. but 
7. and 
8. and
9. because 
10. and 

Exercise 2 – True or False 
1. False 
2. True 
3. True 
4. False 
5. False 
6. True 
7. True 
8. True 
9. False 
10. False 

Exercise 3 – Multiple Choice Questions 
1. and 
2. but 
3. and 
4. but 
5. because 
6. because 
7. but 
8. and 
9. because 
10. and 

Exercise 4 – Replace the Incorrect Word 
1. but 
2. and 
3. because 
4. because 
5. but 
6. and 
7. because 
8. but 
9. and 
10. but 

Exercise 5 – Sentence Writing 
Answers may vary.


Help your child connect ideas clearly and confidently using “and,” “but,” and “because” through structured, real-life grammar practice.

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