Use commas to separate items in a list of three or more.
Use commas to separate independent clauses when they are joined by conjunctions.
Use a comma to separate a dependent clause from an independent clause.
Use a comma to separate any Word or phrase from the rest of the sentence that is not essential to the sentence's meaning, or that provides extra information about the subject.
Use a comma to separate quotations from the rest of the sentence. (trailing commas appear inside quotation marks)
Use a comma to separate an introductory element from the rest of the sentence.
Use a comma to separate the names of a city from the name of a state.
Use a comma to separate the day of the week, from the day of the month, and the year.
