Run-on sentences worksheets

By grade

• 3rd Grade A gentler on-ramp
• 4th Grade Right on level
• 5th Grade A step harder
• 6th Grade A step harder

What students need to know

A run-on squeezes two sentences into one. Find where the first idea ends, then add a period and a capital letter.

This skill runs from 3rd grade through 6th grade. Pick a grade above for level-matched sentences, teaching notes, and worksheets.

Run-on sentences across the grades

3rd grade

Run-on sentences worksheets for third grade print two sentences squeezed together with nothing between them. Your child finds where the first idea ends and writes in the missing period and capital letter. The choice version asks them to pick the correctly split sentence instead.

4th grade

Fourth grade run-on worksheets practice L.4.1.f directly: recognize and correct run-ons. The run-ons get longer, and the wrong choices now include the comma splice, two sentences joined by a bare comma, which is the error fourth graders write most.

5th grade

Fifth grade run-on sentences worksheets add the second repair tool: a comma plus a joining word like and, but, or so. Some items are best split with a period; others read better joined. Your child picks the fix that keeps the meaning smooth.

6th grade

Sixth grade run-on worksheets read like editing practice for real essays: longer clauses, comma splices, and run-ons buried in detail. Your child repairs each one with a period or a comma and a conjunction, the same two moves editors use.