When Should You Use the Comma?

– Use commas to separate items in a list.

– Use a comma after introductory word, phrase, words that come before the main phrase.

– Use a comma before a quotation.

– Use a comma to join two long phrases.

– Use commas to set off clauses, phrases, and words that are not essential to the meaning of the sentence.

– Use commas to separate coordinate adjectives that describe the same noun.