Comma splices are a type of run-on sentence in which two independent clauses are joined with a comma and made into one incorrect sentence. Each phrase can stand on its own as a sentence because each has a subject and verb.
We watched TV tonight, it was good.
I didn't know what job I wanted, I was too confused to decide.
You can fix these problems three ways.
First of all, you can split the halves of the sentences into two separate sentences.
We watched TV tonight. It was good.
I didn't know what job I wanted. I was too confused to decide.
The second way to fix a comma splice is to add in a coordinating conjunction, or a connecting word. Some common connecting words include "and," "but," "yet," "or," "nor," "so."
We watched TV tonight, and it was good.
I knew what job I wanted, but I was too confused to decide.
The third option is to join the two phrases with a semicolon or with a semicolon and certain specific connecting words like "however" or "yet," followed by a comma. Just a semicolon is best if the two halves of the sentence agree with each other.
We watched TV tonight; it was good.
The semicolon and the connecting word is most often used when the two phrases present a contrast.
I knew what job I wanted; however, I was too confused to decide.
To spot comma splices: Watch for phrases with a subject and a verb that could stand on their own as a complete sentence.