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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 24 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 dog barked, and the cat ran away., I wanted to go out, but it was raining., A bird built a nest in the hedge., The moon rose over the hill., Grandpa fixed the old clock., The sun came out, so we went to the park.

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

Sort: We could bake a cake, or we could make pancakes., The baby fell asleep., The train left the station., Mia found a shell, and she gave it to me., The bell rang, and the children lined up., Our teacher read us a story.

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

Sort: The store was closed, so we went home., My sister plays the violin., The bread rose, and Dad sliced it., A fox ran across the road., The puppy chewed my sock., It was cold, so we wore our hats.

Simple sentenceCompound sentence

LessonPrint · L.3.1 · Set 24 · free to copy for classroom use

Answer key — Simple or Compound?

Set 24. Prints on its own sheet.

  1. 1.1. A bird built a nest in the hedge. — Simple sentence 2. Grandpa fixed the old clock. — Simple sentence 3. I wanted to go out, but it was raining. — Compound sentence 4. The dog barked, and the cat ran away. — Compound sentence 5. The moon rose over the hill. — Simple sentence 6. The sun came out, so we went to the park. — Compound sentence
  2. 2.1. Mia found a shell, and she gave it to me. — Compound sentence 2. Our teacher read us a story. — Simple sentence 3. The baby fell asleep. — Simple sentence 4. The bell rang, and the children lined up. — Compound sentence 5. The train left the station. — Simple sentence 6. We could bake a cake, or we could make pancakes. — Compound sentence
  3. 3.1. A fox ran across the road. — Simple sentence 2. It was cold, so we wore our hats. — Compound sentence 3. My sister plays the violin. — Simple sentence 4. The bread rose, and Dad sliced it. — Compound sentence 5. The puppy chewed my sock. — Simple sentence 6. The store was closed, so we went home. — Compound sentence

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