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Fragments and Run-On Sentences Worksheet | Sentence Structure Activity - Free Printable

Fragments and Run-On Sentences Worksheet | Sentence Structure Activity

Educational worksheet: Fragments and Run-On Sentences Worksheet | Sentence Structure Activity. Download and print for classroom or home learning activities.

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Show Answer Key & Explanations Step-by-step solution for: Fragments and Run-On Sentences Worksheet | Sentence Structure Activity
Let’s go through each sentence one by one and decide if it’s a fragment, a sentence, or a run-on.

Remember:
- A sentence has a subject and verb and expresses a complete thought.
- A fragment is missing something — maybe no subject, no verb, or doesn’t make sense on its own.
- A run-on smashes two sentences together without proper punctuation or connecting words.

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1. *Because we lost the game.*
→ This starts with “because” — that means it’s giving a reason, but it doesn’t tell us what happened because of losing. It’s incomplete.
Fragment

2. *The dog chased the three cats.*
→ Subject: “The dog”, Verb: “chased”, Object: “the three cats”. Complete thought.
Sentence

3. *My parents help me.*
→ Subject: “My parents”, Verb: “help”, Object: “me”. Makes sense alone.
Sentence

4. *We bought the new chair with our credit card.*
→ Subject: “We”, Verb: “bought”, rest tells what and how. Complete.
Sentence

5. *She taught the lesson she gave a test.*
→ Two ideas here: “She taught the lesson” AND “she gave a test.” But there’s no period, comma, or word like “and” to connect them. Smashed together!
Run-on

6. *He wants to go to school he wants to get a job.*
→ Again, two full thoughts: “He wants to go to school” + “he wants to get a job.” No punctuation or connector between them.
Run-on

7. *While he was reading the book.*
→ Starts with “while” — this sets up a time, but doesn’t say what happened during that time. Incomplete.
Fragment

8. *I failed the test I didn’t study.*
→ Two separate thoughts: “I failed the test” and “I didn’t study.” No punctuation or conjunction.
Run-on

9. *The salesman wearing the red tie.*
→ Who? The salesman. What about him? He’s “wearing the red tie” — but that’s just describing him. There’s no main verb telling what he did. Not a full thought.
Fragment

10. *The play was long we didn’t stay until the end.*
→ Two complete thoughts: “The play was long” and “we didn’t stay until the end.” No punctuation or connector.
Run-on

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Final Answer:
1. Fragment
2. Sentence
3. Sentence
4. Sentence
5. Run-on
6. Run-on
7. Fragment
8. Run-on
9. Fragment
10. Run-on
Parent Tip: Review the logic above to help your child master the concept of fragments and run ons worksheets with answer key.
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