Reading & WritingExpression of IdeasHigh frequency
SAT Reading & Writing: Run-On Sentences / Comma Splices
47+ practice questions in Praczo
What you need to know
The concept, explained
- 1
A run-on sentence fuses two independent clauses without proper punctuation. A comma splice attempts to join two independent clauses with only a comma.
- 2
To fix these, use one of four methods:
- 3
1. A period: [Clause 1]. [Clause 2]
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2. A semicolon: [Clause 1]; [Clause 2]
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3. Comma + FANBOYS: [Clause 1], and [Clause 2]
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4. Subordination: Because [Clause 1], [Clause 2]
Common mistakes
- ✗ Fixing a run-on by simply adding a comma, thereby creating a comma splice.
- ✗ Adding a conjunction (like "and") after a semicolon (e.g., "Sentence; and sentence" is a grammar error).
Try a sample question
SAT-style practice
The concert was sold out months in advance, many fans resorted to buying tickets from scalpers.
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