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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 21 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., It was cold, so we wore our hats., Rain dripped from the roof., The path was icy, but nobody fell., My sister plays the violin.

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

Sort: Our teacher read us a story., The moon rose over the hill., The dog barked, and the cat ran away., Mia found a shell, and she gave it to me., A fox ran across the road., 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., The store was closed, so we went home., The bread rose, and Dad sliced it., We ate lunch under the tree., The bread rose in the oven., The puppy chewed my sock.

Simple sentenceCompound sentence

LessonPrint · L.3.1 · Set 21 · free to copy for classroom use

Answer key — Simple or Compound?

Set 21. Prints on its own sheet.

  1. 1.1. It was cold, so we wore our hats. — Compound sentence 2. My sister plays the violin. — Simple sentence 3. Rain dripped from the roof. — Simple sentence 4. The bell rang, and the children lined up. — Compound sentence 5. The path was icy, but nobody fell. — Compound sentence 6. The train left the station. — Simple sentence
  2. 2.1. A fox ran across the road. — Simple sentence 2. I wanted to go out, but it was raining. — Compound sentence 3. Mia found a shell, and she gave it to me. — Compound sentence 4. Our teacher read us a story. — Simple sentence 5. The dog barked, and the cat ran away. — Compound sentence 6. The moon rose over the hill. — Simple sentence
  3. 3.1. The bread rose in the oven. — Simple sentence 2. The bread rose, and Dad sliced it. — Compound sentence 3. The puppy chewed my sock. — Simple sentence 4. The store was closed, so we went home. — Compound sentence 5. We ate lunch under the tree. — Simple 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.