In fact, precise rules govern when to use this punctuation mark. When followed, they lay the groundwork for clear written communication.
We’ve compiled a list of all of the times when you need the mighty comma.
1. Use a comma before any coordinating conjunction (and, but, for, or, nor, so, yet) that links two independent clauses.
Example: “I went running, and I saw a duck.”
You may need to learn a few grammatical terms to understand this one.
An independent clause is a unit of grammatical organization that includes both a subject and verb and can stand on its own as a sentence. In the previous example, “I went running” and “I saw a duck” are both independent clauses, and “and” is the coordinating conjunction that connects them. Consequently, we insert a comma. See More . . .