Comma Notes

1.) They divide items into lists, but are not requires before the "and on the end.
Ex: The four refreshing fruit flavors of Opal Fruits are orange, lemon, strawberry and lime.

2.) Commas are used when two completes senterces are joined together using such conjunctions as "and", "or", "but", and "yet".
Ex" The boys wanted to stay up past midnight, but they had a race to run the next day, and their coach told them no.

  Comma splice- occurs when use a comma is used instead of a semi-colon.
      Ex: It was the queens birthday, she recieved a lot of presents.
        Should be: It was the queens birthday; she recieved a lot of presents.
        or:  It was the queens birthday, and she recieved a lot of presents.

3.) Commas fill gaps where other words might go.
Ex: Annie had dark hair; Sally, fair.

4.) Commas before direct speech.
Ex: The queen said, "It's my birthday and I want lots of presents."

5.) Commas set off interjections.
Ex: Stop, or I'll scream.

6.) Commas set aside non-essential information.
Ex: John Keats, who did any harm to anyone, is often invoked by grammarians.