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What is a run-on sentence?
A run-on sentence is an ungrammatical construction in which two or more independent clauses are improperly joined without a conjunction or appropriate punctuation. When a sentence contains several subjects and verb combinations causing the reader to read on and on, that sentence is called a run-on sentence. The effect is that the reader loses the main idea of the sentence. Example: He doesn't need me he just calls to make himself feel better. Here you could use a semicolon: He doesn't need me; he just calls to make himself feel better. Another example: I went to the store I was out of bananas. Here you could either use a semicolon or a conjunction, such as because: I went to the store because I was out of bananas.