What should a third grade answer look like?

A single smooth sentence that uses every piece: The rainbow arched over the wet field after the storm. The key shows one model, and equally natural versions earn full credit.

Where does this lead?

Straight into paragraph writing. Kids who can grow a sentence on demand stop writing chains of three-word sentences, and their paragraphs start to breathe.

3rd grade expanding sentences

3rd grade expanding sentences worksheets

Third grade expanding sentences worksheets use richer pieces and longer results. Your child builds each sentence, keeping the pieces in an order that reads naturally, and the answer key shows the model sentence for a quick check.

Free printable PDF worksheet, aligned to Common Core L.2.1.f.

Each print is a different sheet with its own answer key. You don't need to sign up.

The kind of sentences you'll fix

Make each sentence grow: add the words in parentheses. Write the new sentence on the line.

The librarian stamped. (my book) (with a blue date)
Fixed: The librarian stamped my book with a blue date.
My sister braided. (her long hair) (before bed)
Tom stirred. (the hot cocoa) (with a candy cane)

Every print pulls a new set of sentences at this level, so a make-up test or a second sibling gets a different mix.

What's on a 3rd grade sheet

3rd grade sheets draw from 60 sentences, 8 to a page. All 60 are on 2nd grade sheets too, along with 60 more. 2nd grade sheets print 7 to a page.

A few of the sentences, as the answer key corrects them:

The baker sliced the warm loaf very thin.
Diego caught the fly ball with one hand.
Hail tapped on the tin roof like popcorn.

Fix it. Make each sentence grow: add the words in parentheses. Write the new sentence on the line. 8 sentences to fix per page.

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

Push past correct into vivid: after the sheet, take one answer and ask your child to swap the growth piece for one of their own. The worksheet teaches the mechanics; inventing their own details is where the writing habit forms.

Watch for: Kids copy the kernel and forget the new words. Have them touch each parenthesis and check it made it into the sentence before moving on. Kids drop the period when the sentence grows. The end mark moves to the END of the new sentence; nothing gets to trail after it.

Common questions about 3rd grade expanding sentences

What should a third grade answer look like?: A single smooth sentence that uses every piece: The rainbow arched over the wet field after the storm. The key shows one model, and equally natural versions earn full credit.
Where does this lead?: Straight into paragraph writing. Kids who can grow a sentence on demand stop writing chains of three-word sentences, and their paragraphs start to breathe.

Related worksheets

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Aligned to Common Core L.2.1.f. Reviewed by the One more sheet team. Content version 241, updated August 2026.

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