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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 pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 18 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

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

2.apostrophe

Harrisons fourth clock lost five seconds.

3.commas

The dam slows the water and silt drops out.

4.commas

They wove for a day and Arachne's cloth was better.

5.commas

We tested wood rubber and metal.

6.commas

Harrison built four clocks and the fourth one worked.

7.apostrophe

The villages clock was four minutes fast.

LessonPrint · L.4.2 · Set 18 · free to copy for classroom use

Answer key — Commas in Compound Sentences

Set 18. Prints on its own sheet.

  1. 1.Lichens absorb what is in the air, so they vanish where it is dirty.
  2. 2.Harrison's fourth clock lost five seconds.
  3. 3.The dam slows the water, and silt drops out.
  4. 4.They wove for a day, and Arachne's cloth was better.
  5. 5.We tested wood, rubber and metal.
  6. 6.Harrison built four clocks, and the fourth one worked.
  7. 7.The village's clock was four minutes fast.

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