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Simple or Compound? is a free printable Grade 3 English worksheet on telling one complete thought from two joined ones, aligned to Common Core standard L.3.1. It prints 3 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 23 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.

Simple or Compound?

L.3.1

NameDate

Sort each sentence into the right column.

1.Sort each one: Simple sentence or Compound sentence?

Sort: The baby fell asleep., I wanted to go out, but it was raining., You can draw a picture, or you can write a poem., The train left the station., The sun came out, so we went to the park., The moon rose over the hill.

Simple sentenceCompound sentence
2.Sort each one: Simple sentence or Compound sentence?

Sort: It was cold, so we wore our hats., We could bake a cake, or we could make pancakes., Rain dripped from the roof., My sister plays the violin., The path was icy, but nobody fell., Grandpa fixed the old clock.

Simple sentenceCompound sentence
3.Sort each one: Simple sentence or Compound sentence?

Sort: We ate lunch under the tree., The bread rose, and Dad sliced it., The bread rose in the oven., Our teacher read us a story., Leo likes apples, but his brother likes pears., The bell rang, and the children lined up.

Simple sentenceCompound sentence

LessonPrint · L.3.1 · Set 23 · free to copy for classroom use

Answer key — Simple or Compound?

Set 23. Prints on its own sheet.

  1. 1.1. I wanted to go out, but it was raining. — Compound sentence 2. The baby fell asleep. — Simple sentence 3. The moon rose over the hill. — Simple sentence 4. The sun came out, so we went to the park. — Compound sentence 5. The train left the station. — Simple sentence 6. You can draw a picture, or you can write a poem. — Compound sentence
  2. 2.1. Grandpa fixed the old clock. — Simple sentence 2. It was cold, so we wore our hats. — Compound sentence 3. My sister plays the violin. — Simple sentence 4. Rain dripped from the roof. — Simple sentence 5. The path was icy, but nobody fell. — Compound sentence 6. We could bake a cake, or we could make pancakes. — Compound sentence
  3. 3.1. Leo likes apples, but his brother likes pears. — Compound sentence 2. Our teacher read us a story. — Simple sentence 3. The bell rang, and the children lined up. — Compound sentence 4. The bread rose in the oven. — Simple sentence 5. The bread rose, and Dad sliced it. — Compound sentence 6. We ate lunch under the tree. — Simple sentence

Last reviewed 2026-09-05. Aligned to L.3.1 of the Common Core State Standards for English Language Arts.