What are four rules for using commas?

Here are four rules for using commas, but remember, there are many more! These four are just a good starting point.

1. To separate items in a list:

* Example: I bought apples, oranges, bananas, and grapes at the store.

2. To separate independent clauses joined by a coordinating conjunction (FANBOYS):

* Example: I went to the park, and I saw a squirrel.

3. To set off introductory elements:

* Example: After the rain, the sun came out.

* Example: Yes, I would love to go to the movies.

4. To set off non-essential phrases or clauses:

* Example: The dog, which was very friendly, wagged its tail.

* Example: My sister, a talented artist, painted a beautiful mural.

Let me know if you want to learn more about comma rules, or if you have any specific examples you'd like to discuss!