7th grade run-on sentences worksheets

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Seventh grade run-on worksheets name both kinds: the fused sentence, with nothing between two sentences, and the comma splice, with only a comma. Your child writes in the missing period and capital. The choice version asks them to find the one correct sentence next to the fused version and the splice.

Free printable PDF worksheet.

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

Each line runs two sentences together. Add the missing period and capital letter to split them.

  1. Although the magnet looked strong, it barely lifted three paper clips the smaller one lifted seven.

    Fixed: Although the magnet looked strong, it barely lifted three paper clips. The smaller one lifted seven.

  2. The library keeps a collection of old city maps some of them show streets that no longer exist.
  3. The Wright brothers built their first plane from spruce and muslin its first flight lasted only twelve seconds.

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 7th grade sheet

7th grade sheets draw from 53 sentences, 8 to a page. None of these sentences are on 6th grade sheets.

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

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

How to teach this

Teach one test for every comma. Cover everything after it, then everything before it. If both halves could stand as sentences, the comma is a splice. Seventh grade items often open with a dependent clause (when the rain stopped, ...), and that first comma is correct, so the test keeps kids from fixing the wrong comma. The fix sheet takes the period out completely. Have your child read the line aloud and listen for the spot where a second complete sentence begins. A who-did-what pair after when or because is not that spot, since that part can't stand alone.

Watch for: Kids split at the first breath instead of the end of the idea. Have them find the two parts that could each stand alone as a sentence; the split goes where the second one starts. A part that opens with when, because, or if can't stand alone, so it stays attached to the sentence after it. Kids think a comma fixes a run-on. A comma alone makes a comma splice, which is still a run-on wearing a disguise. It needs a period or a comma plus a joining word.

Common questions about 7th grade run-on sentences

What is the difference between a fused sentence and a comma splice?
A fused sentence has nothing between two complete sentences: the bell rang we left. A comma splice has only a comma: the bell rang, we left. Both are run-ons, and both get fixed the same way.
Why do the fix items use a period?
Because a period is the repair that always works, and it gives the key one clear answer. A semicolon in the same spot is also correct. The choice version shows the other repairs: a comma with and, but, or so, and a semicolon.

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Reviewed by the One more sheet team. Content version 241, updated October 2026.

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