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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 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.

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 train left the station., The bell rang, and the children lined up., Rain dripped from the roof., The dog barked, and the cat ran away., The moon rose over the hill., The store was closed, so we went home.

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

Sort: We ate lunch under the tree., The baby fell asleep., The sun came out, so we went to the park., Our teacher read us a story., The bread rose, and Dad sliced it., I wanted to go out, but it was raining.

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

Sort: We could bake a cake, or we could make pancakes., Mia found a shell, and she gave it to me., The path was icy, but nobody fell., Grandpa fixed the old clock., A fox ran across the road., My sister plays the violin.

Simple sentenceCompound sentence

LessonPrint · L.3.1 · Set 12 · free to copy for classroom use

Answer key — Simple or Compound?

Set 12. Prints on its own sheet.

  1. 1.1. Rain dripped from the roof. — Simple sentence 2. The bell rang, and the children lined up. — Compound sentence 3. The dog barked, and the cat ran away. — Compound sentence 4. The moon rose over the hill. — Simple sentence 5. The store was closed, so we went home. — Compound sentence 6. The train left the station. — Simple sentence
  2. 2.1. I wanted to go out, but it was raining. — Compound sentence 2. Our teacher read us a story. — Simple sentence 3. The baby fell asleep. — Simple sentence 4. The bread rose, and Dad sliced it. — Compound sentence 5. The sun came out, so we went to the park. — Compound sentence 6. We ate lunch under the tree. — Simple sentence
  3. 3.1. A fox ran across the road. — Simple sentence 2. Grandpa fixed the old clock. — Simple sentence 3. Mia found a shell, and she gave it to me. — Compound sentence 4. My sister plays the violin. — 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

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