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Run-On Sentences

Run-on sentences occur when writers try to combine more than one idea into a single sentence. They cause confusion because readers are not sure when one idea ends and the next one begins. Read our entry and test your knowledge with our quiz!



Compound Sentences

Compound Sentences have two parts, both of which can stand alone as their own sentences if you separate them. The two parts are usually linked with a semicolon, or with a comma and a conjunction like “and,” “or,” or “but.”

Example: Jeff bought his girlfriend an umbrella for her birthday; she was hoping for something a little more romantic.

There are two complete ideas here that are separated by a semicolon.

Example: I like football a lot, but baseball is my favorite sport.

The two parts, “I like football a lot” and “baseball is my favorite sport,” could stand on their own if you got rid of the linking word “but.”