3rd grade simple and compound sentences worksheets
Third grade worksheets add the classic trap: compound subjects and compound predicates. Ben and Leo share a locker is still a simple sentence, because both boys share one action. Your child labels each sentence, and the trap items are budgeted onto every sheet.
Free printable PDF worksheet, aligned to Common Core L.3.1.i.
A new sheet every click.
The kind of sentences you'll get
Read each sentence. Circle the letter of the correct label.
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“The owl slept all day.” This is: .
a simple sentence · a compound sentence
Answer: a simple sentence
- “Ben and Leo share a locker.” This is: . a compound sentence · a simple sentence
- “The twins traded their stickers.” This is: . a compound sentence · a simple sentence
Every print pulls a fresh set of sentences at this level, so a make-up test or a second sibling never gets the same sheet.
What's on each sheet
- Choose the word. Read each sentence. Circle the letter of the correct label. 10 questions per page.
Every version prints on US Letter or A4, with its answer key on the last page.
How to teach this
The trap items are the lesson this year. When your child calls Ben and Leo share a locker compound, ask how many actions happened. Two people, one sharing: one who-did-what pair, so it is simple. Repeat with a compound predicate (The dog barked and howled) and the idea locks in.
Watch for: Kids see the word and anywhere and shout compound. The test is whether BOTH sides of the joining word could stand alone as sentences. Long does not mean compound. A simple sentence can carry many describing words and still have one who-did-what pair.
Common questions about simple and compound sentences
- What is the trap on the third grade sheet?
- Compound subjects and predicates. Maya washed and dried the dishes has two verbs but ONE who-did-what pair, so it is simple. Every sheet includes a few of these on purpose.
- How can my child check an answer fast?
- Cover one half of the sentence at the joining word and read each half alone. Both halves stand alone: compound. Either half falls over: simple.
Related worksheets
- 2nd grade simple and compound sentences A step easier, same skill
- 4th grade simple and compound sentences A step harder, same skill
- 3rd grade combining sentences Same grade, nearby skill
- 3rd grade complex sentences Same grade, nearby skill
- 3rd grade expanding sentences Same grade, nearby skill
- Simple and compound sentences, all grades The full progression
- All 3rd grade English worksheets Every skill at this level
- All 3rd grade worksheets Everything at this level
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Aligned to Common Core L.3.1.i. Reviewed by the One more sheet team. Content version 178, updated August 2026.
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