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3rd Grade Build Complete Sentences worksheets

6 printable versionsBuilding ConfidenceAbout 6 minutes eachFree · no account

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Build Complete Sentences

Grade 3 Writing Worksheet - Building Confidence

NameDate

Circle the answer, or write your answer on the lines.

  1. Which is a complete sentence?

    • The puppy in the yard.
    • The puppy chased the ball.
    • Chased the ball.

  2. Which words finish the sentence? "The baby bird ___."

    • chirped in its nest
    • a soft little nest
    • in its nest

  3. Which group of words is missing who or what?

    • The frog jumped over the log.
    • Jumped over the puddle.
    • Max jumped over the puddle.

  4. "The tall giraffe." Which revision makes a complete sentence?

    • The tall giraffe reached the top leaves.
    • The tall giraffe at the zoo.
    • Reached the top leaves.

  5. Write two complete sentences about a bike. Each one needs who or what and what happens.

    Sentence 1
    Sentence 2
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3rd Grade Build Complete Sentences worksheet 1 – printable PDF
Download PDF: 123456

About this worksheet

A complete sentence needs both a naming part and an action or telling part. Third graders may understand this when speaking, but written fragments still appear when they start with an action and forget who did it. Run-on sentences are the opposite problem: two complete thoughts get pushed together without a stopping point. This worksheet gives students short, checkable decisions about sentence building.

They identify complete sentences, choose predicates, fix fragments, and split or join run-ons. The goal is not grammar labeling for its own sake. It is helping children build sentences that a reader can follow without asking who, what happened, or where one thought ends. The repeated choices build a habit they can use during drafting too.

What your child will learn

  • Choose a complete sentence
  • Combine a subject with a predicate
  • Revise fragments into complete sentences
  • Split run-on sentences into clearer thoughts

Common Core standard: L.3.1

Worked example

'Chased the red ball' is missing who did the action. 'The puppy chased the red ball' is complete.

Common mistake

Thinking a group of words is complete because it is long, even when it is missing a subject or predicate.

Helpful hint

Ask who or what the sentence is about, then ask what happened.

Next skill: Build a Focused ParagraphEarlier: Write With Sensory Details

Questions parents ask

What is the most common mistake with build complete sentences?

Thinking a group of words is complete because it is long, even when it is missing a subject or predicate.

How can I help my child with build complete sentences?

Ask who or what the sentence is about, then ask what happened.

Are these 3rd grade writing worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

Similar: Build a Focused Paragraph

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