Commas
Commas with interrupters--Use a comma to set off an expression that interrupts a sentence.
Example: The car, the one with the rusty hood and flat tires, has been in the backyard for years.
My favorite food, a deep dish everything pizza, is on special at the restaurant.
Use a comma to set off an expression or words that interrupt the beginning of a sentence.
Example: From the back of the room, Sam heard his kitten mewing.
Use a comma to set of direct address no matter where it is in a sentence.
Example: Lincoln, open the door now!
I told you, Alvin Jones, that you are in big trouble!
Use a comma to set off a parenthetical expression. A parenthetical expression is an expression that connects two ideas, etc.
Example: The old bike, I really think, should be junked.
The cake, on the other hand, is not good at all.
Use a comma to separate the parts of a date and the parts of an address.
Example: Jason was born on Tuesday, July 1, 2011.
I live at 77 Wilshire Avenue, Forest Hills, California.