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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 12 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 dam slows the water and silt drops out.

3.apostrophe

Arachnes cloth showed the gods behaving badly.

4.apostrophe

The villages clock was four minutes fast.

5.commas

The polyps expel the algae and the coral turns white.

6.commas

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

7.apostrophe

Rontgens wife put her hand on the plate.

LessonPrint · L.4.2 · Set 12 · free to copy for classroom use

Answer key — Commas in Compound Sentences

Set 12. Prints on its own sheet.

  1. 1.Harrison built four clocks, and the fourth one worked.
  2. 2.The dam slows the water, and silt drops out.
  3. 3.Arachne's cloth showed the gods behaving badly.
  4. 4.The village's clock was four minutes fast.
  5. 5.The polyps expel the algae, and the coral turns white.
  6. 6.Lichens absorb what is in the air, so they vanish where it is dirty.
  7. 7.Rontgen's wife put her hand on the plate.

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