Use a comma to indicate direct address

Use a comma to indicate direct address

Rule: When a speaker in a sentence names the person to whom he is speaking, this addressing of his audience is called direct address. Direct address is indicated by the use of a comma or commas, depending upon its placement within the sentence.

I think, John, you’re wrong.
John, I think you’re wrong.
I think you’re wrong, John.

commaindicatedirect