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Comma splices
Introduction

Comma splices are two independent clauses that are incorrectly joined by a comma. The steps for identifying and fixing them are the same as those for spotting run-on sentences:

  1. Find the subjects and verbs of the sentence.

  2. Identify whether each subject and verb belongs to an independent or a dependent clause.  
    Independent clauses: Jasper was a birdwatcher.
      Juanita enjoyed stargazing.
    Dependent clauses: Since Jasper was a birdwatcher
     When Juanita enjoyed stargazing

  3. If you find two independent clauses joined by a comma in the same sentence, draw an imaginary line between them.

    Jasper was a birdwatcher, | Juanita enjoyed stargazing.

  4. Fix the comma splice in one of these ways:

    a. Separate the independent clauses with a period or a semicolon.
    Correct:
    Jasper was a birdwatcher; Juanita enjoyed stargazing.

    b. Use a comma before a coordinating conjunction: and, or, nor, but, for, so, yet.
    Correct:
    Jasper was a birdwatcher, but Juanita enjoyed stargazing.

Remember: Independent clauses are mini-sentences: they can stand alone as grammatically complete units. If two or more of them are smuggled into the same sentence with only a comma separating them, they must be broken apart in one of the above ways.



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