Fix the Flow: Run-on Sentences for Grade 3

This Grade 3 worksheet helps learners understand run-on sentences and how to correct them using simple punctuation and joining words. Focused on the topic Run-on Sentences (intro & correction), it gives children age-appropriate practice in identifying complete sentences, choosing the correct correction, rewriting faulty sentences, filling in blanks with suitable connectors, and writing a short paragraph.

Why Run-on Sentences Matter in Grammar?

Run-on sentences can make writing confusing and hard to read. For Grade 3 learners, this topic is important because:
1. It teaches children how to separate ideas clearly.
2. It builds confidence in using full stops and joining words correctly.
3. It improves sentence structure in both speaking and writing.
4. It helps young writers express ideas in a smooth, meaningful way.

What’s Inside This Worksheet?

This worksheet includes five grammar-rich activities that strengthen sentence correction skills:

Exercise 1 – Underline the Correct Sentence
Students read pairs of sentences and underline the one that is not a run-on sentence.

Exercise 2 – Multiple Choice Question
Students choose the best corrected version of each run-on sentence from three options.

Exercise 3 – Sentence Rewriting
Students rewrite run-on sentences using suitable joining words to make the meaning clear and complete.

Exercise 4 – Fill in the Blanks
Students complete a short passage using joining words such as and, so, or, but, and because.

Exercise 5 – Paragraph Writing
Students write a short paragraph on “My Mother,” giving them a chance to apply sentence-writing skills independently.

This worksheet builds practical grammar understanding by helping children notice sentence breaks, connect ideas properly, and improve overall writing clarity in a simple, guided way.

Answer Key (For Parents & Educators)

Exercise 1 – Underline the Sentence That Is Without Run-on
1. The puppy barked because it wanted milk.
2. Ravi found a kite and it flew high.
3. A kitten jumped because it saw yarn.
4. The train slowed. The passengers stood.
5. The bell rang. Students went in.
6. Riya ran fast, but she missed the bus.
7. The wind blew and leaves scattered.
8. Raj dropped his lunch. It fell.
9. Meera saw a rainbow, so she smiled.
10. The shop opened and people entered.

Exercise 2 – Multiple Choice Question
1. c
2. a
3. b
4. a
5. b
6. c
7. b
8. a
9. c
10. b

Exercise 3 – Sentence Rewriting
1. Tara is tall, but she is weak.
2. We went to the store because we ran out of milk.
3. I forgot my jacket, so I felt very cold at recess.
4. Ravi spilled water, and the floor became wet. 
5. Meera baked cookies, but they smelled sour.
6. Aarav did not walk carefully, so he slipped.
7. The puppy wagged its tail because it saw food.
8. The bell rang, and the students lined up.
9. I have a pen, but it does not have ink.
10. The drum sounded, and dancers started moving.

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

Exercise 5 – Paragraph Writing
Answers may vary.

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