| A | B |
|---|
| Wednesday, November 21, 1982 | A comma is used to separate a day of the week from a month, or a date of the month from a year. |
| Baltimore, Maryland | A comma is used to separate a city from a state or country. |
| Robin, Judy, and Isabel are friends | A comma is used to separate words or groups of words in a series. |
| I hope, Charlie, that you will behave | Use commas to separate the name of a person or group from the rest of the sentence when that person or group is addressed directly - separate nouns of direct address |
| Yes, I did have a good time | Use commas to separate introductory or interrupting words from the rest of the sentence. |
| Scott, my friend, made the team. | Use commas to set off an appositive or an appositive phrase. These are words that tell more about a noun. |
| He lives in Paris, France | Use a comma to separate a city from a state or country. |
| My son, Michael, is a wonderful student. | Use commas to set off an appositive or an appositive phrase. |
| Michael, clean your room! | Use commas to separate the name of a person or group from the rest of the sentence when that person or group is addressed directly - separate nouns of direct address |
