Unlock hundreds more features
Save your Quiz to the Dashboard
View and Export Results
Use AI to Create Quizzes and Analyse Results

OR
Sign inSign in with Facebook
Sign inSign in with Google
Quizzes > English & Grammar

Run On Sentence Checker Quiz: Spot and Fix Run‑Ons

Quick, free quiz with a built-in run on sentence detector. Instant results.

Editorial: Review CompletedCreated By: Thomas PrinchUpdated Aug 25, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for run on sentence quiz on a golden yellow background

This quiz helps you spot run-on sentences fast and choose the best fix. Build smoother, clearer sentences, then keep learning with our compound and complex sentences quiz and a quick sentence types quiz. Need a grammar reset? Practice clause basics in the subject and predicate quiz.

Which sentence is a run-on (fused or comma splice)?
I made coffee, and I toasted bread.
Because I made coffee, I felt awake.
I made coffee I toasted bread.
After I made coffee, I toasted bread.
undefined
Choose the best fix for the comma splice: We left early, the roads were icy.
We left early, but the roads were icy.
We left early. The roads were icy.
We left early, because the roads were icy.
We left early; although the roads were icy.
undefined
A comma splice is two independent clauses joined only by a comma.
True
False
undefined
Identify the run-on:
Because the meeting ended late, we missed the bus.
The meeting ended late, so we missed the bus.
The meeting ended late, we missed the bus.
The meeting ended late; we missed the bus.
undefined
This is a run-on sentence.
True
False
undefined
Which correction uses a semicolon correctly? The sun set quickly we hurried home.
The sun set quickly, we hurried home.
The sun set quickly; and we hurried home.
The sun set quickly; we hurried home.
The sun set quickly; because we hurried home.
undefined
A semicolon can connect two closely related independent clauses without a conjunction.
False
True
undefined
Fused sentences lack both punctuation and coordinating conjunctions between independent clauses.
True
False
undefined
Choose the sentence that avoids a run-on by using a subordinating conjunction.
I finished my work; and I went to lunch.
After I finished my work, I went to lunch.
I finished my work, I went to lunch.
I finished my work I went to lunch.
undefined
Which pair correctly identifies the error type? A: I love hiking, it relaxes me. B: I love hiking it relaxes me.
A is fused; B is comma splice.
Both are comma splices.
Both are fused sentences.
A is comma splice; B is fused.
undefined
Select the best conjunction to fix: The storm intensified, ___ we took shelter.
so
therefore
however
and
undefined
Using only a comma with a conjunctive adverb (however, therefore) correctly joins two sentences.
False
True
undefined
Which revision correctly uses a conjunctive adverb? It was late, however we stayed.
It was late; however, we stayed.
It was late however, we stayed.
It was late: however we stayed.
It was late, however, we stayed.
undefined
Identify the run-on created by a misused comma with a quote.
"We should leave now" was her advice.
"We should leave now," she said, "the roads are getting worse."
"We should leave now," she said, "because the roads are getting worse."
She said, "We should leave now."
undefined
Two independent clauses can be joined with a comma if they are short (e.g., I came, I saw).
False
True
undefined
A colon is typically used to join two independent clauses without further justification.
True
False
undefined
Which sentence contains a comma splice with an -ing phrase incorrectly treated as a clause?
She smiled, walking to the door.
She smiled while walking to the door.
While she smiled, she walked to the door.
She smiled, she was walking to the door.
undefined
Run-ons can be fixed by using a dash between two independent clauses without any other consideration.
True
False
undefined
Identify the sentence that contains a hidden run-on using a tag question.
It is cold isn't it?
It is cold; isn't it?
It is cold, isn't it?
Because it is cold, isn't it?
undefined
Identify the only sentence that is a run-on with three independent clauses.
We left early; we stopped for gas; we arrived on time.
We left early, and we stopped for gas, and we arrived on time.
After we left early, we stopped for gas and arrived on time.
We left early, we stopped for gas, we arrived on time.
undefined
0

Study Outcomes

  1. Identify Run-On Sentences -

    Recognize and label run-on sentences and comma splices, understanding the core run-on sentence definition to spot errors like a pro.

  2. Differentiate Sentence Errors -

    Distinguish between run-on sentences, comma splices, and properly punctuated sentences for clearer grammar insight.

  3. Correct Faulty Constructions -

    Apply punctuation rules and conjunction strategies to fix run-on sentences and comma splices effectively.

  4. Apply Revision Techniques -

    Use targeted run on sentence practice to rewrite and refine sentences for improved clarity and flow.

  5. Analyze Punctuation Pitfalls -

    Examine sentence structures to pinpoint common punctuation mistakes and prevent future run-on errors.

  6. Reinforce Learning with Examples -

    Review run-on sentence examples and answers to solidify understanding and boost grammar confidence.

Cheat Sheet

  1. Run-On Sentence Definition and Types -

    Understanding a run-on sentence definition is your first step: it occurs when two independent clauses are improperly joined, causing confusion. They appear as fused sentences ("I love pizza I eat it daily.") or comma splices. Purdue OWL advises spotting these to improve clarity.

  2. How to Identify a Run On Sentence -

    Learn to detect run-on sentences by checking for two complete thoughts stuck together without correct punctuation. A quick scan for missing conjunctions or misused commas helps you catch mistakes early. UNC Writing Center suggests marking independent clauses, then ensuring they're properly linked.

  3. Using Coordinating Conjunctions (FANBOYS) -

    Master FANBOYS (for, and, nor, but, or, yet, so) to join clauses correctly: "I studied hard, so I passed the quiz." Cambridge Dictionary notes this method avoids comma splices. Mnemonic trick: recite each word while clapping to embed it in memory.

  4. Mastering Semicolons for Clarity -

    Semicolons serve as a soft bridge between related clauses: "Grammar can be tricky; practice makes perfect." Think of the semicolon as a soft period linking thoughts without a conjunction. Oxford Guide to Style highlights semicolons as a powerful tool against run-on expansions.

  5. Targeted Run On Sentence Practice -

    Consistent run on sentence practice is key: tackle quizzes that offer run-on sentence examples and answers to reinforce learning quickly. Analyze each correction and note why a semicolon, comma + conjunction, or period works best. Spaced repetition with exercises like this run on sentence quiz cements skills.

Make a Quiz (FREE) Copy & Edit This Quiz Create a Quiz with AI

English & Grammar Quizzes

Powered by: Quiz Maker