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3rd Grade Build Complete Sentences worksheets

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Build Complete Sentences

Grade 3 Writing Worksheet

NameDate

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

  1. Which is a complete sentence?

    • The firefighters with the long hose.
    • The firefighters rolled the hose onto the truck.
    • Rolled the hose back onto the truck.
    • After the fire was out.

  2. Which predicate completes this sentence? "The marching band ___."

    • the loudest band in town
    • played loudly during the parade
    • during the loud parade
    • with shiny drums and horns

  3. "Because the road was icy." Which revision makes a complete sentence?

    • Because the road was icy, the bus drove slowly.
    • Because the road was very icy.
    • The icy road and the slow bus.
    • Because the icy road.

  4. This is a run-on: "The rain stopped we went outside." Which revision fixes it?

    • The rain. Stopped we went outside.
    • The rain stopped, we went outside.
    • The rain stopped. We went outside.
    • The rain stopped we went. Outside.

  5. Write two complete sentences about a thunderstorm. Then fix this fragment: "Ran across the yard."

    Sentence 1
    Sentence 2
    Fixed fragment
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3rd Grade Build Complete Sentences worksheet 1 – printable PDF
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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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