Fix Run-On Sentences Worksheet | FANBOYS Conjunction Practice

Fix the Run-On Sentences Worksheet (FANBOYS Practice)

Run-on sentences happen when two complete thoughts get pushed together without the right punctuation. Young students often do this when they’re writing quickly, so practicing how to fix run-ons is a simple way to build clearer writing.

This printable run-on sentences worksheet gives students straightforward practice rewriting run-on sentences using a comma + a coordinating conjunction (FANBOYS).

What Students Practice

Students will read each run-on sentence and rewrite it correctly by adding:

• a comma, and

• a FANBOYS conjunction: for, and, nor, but, or, yet, so

This is a great skill for editing and revising because it teaches students how to combine ideas without creating long, confusing sentences.

Quick Teaching Tip

Before students start, try this quick check:

1. Read the sentence aloud.

2. Ask: “Do I hear two complete thoughts?”

3. If yes, add a comma + FANBOYS to connect them.

Example:

I wanted to play outside, but it started to rain.

What’s included

• 1 printable run-on sentences worksheet (10 run-on sentences)

• rewrite lines for student answers

• perfect for Grade 3 grammar, editing, or morning work

Use it for

• independent practice

• writing centers

• homework

• quick review before a writing assignment

• editing warm-ups