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Commas in Compound Sentences is a free printable Grade 4 English worksheet on the comma before and, but and so in a compound sentence, aligned to Common Core standard L.4.2. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 25 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Commas in Compound Sentences

L.4.2

NameDate

Rewrite each sentence correctly.

1.commas

Harrison built four clocks and the fourth one worked.

2.commas

The wind blew hard and the old tree fell over.

3.commas

The dam slows the water and silt drops out.

4.commas

We could walk to the park or we could take the bus.

5.commas

I wanted to swim but the pool was closed.

6.commas

You can have the red one or you can have the green one.

7.commas

Lichens absorb what is in the air so they vanish where it is dirty.

LessonPrint · L.4.2 · Set 25 · free to copy for classroom use

Answer key — Commas in Compound Sentences

Set 25. Prints on its own sheet.

  1. 1.Harrison built four clocks, and the fourth one worked.
  2. 2.The wind blew hard, and the old tree fell over.
  3. 3.The dam slows the water, and silt drops out.
  4. 4.We could walk to the park, or we could take the bus.
  5. 5.I wanted to swim, but the pool was closed.
  6. 6.You can have the red one, or you can have the green one.
  7. 7.Lichens absorb what is in the air, so they vanish where it is dirty.

Last reviewed 2026-09-05. Aligned to L.4.2 of the Common Core State Standards for English Language Arts.