|Commas are used to make your writing more clear to the reader. Use commas to separate items in a list of three or more. A comma is needed between independent clauses when they are joined by the words and, or, for, nor, so, but, or yet. Use a comma to separate a dependent clause (incomplete thought) from an independent clause (complete thought). A comma is needed to separate a word or phrase from the rest of the sentence when it is not essential to the meaning. Put the comma inside the quotation marks when it is used to separate the quotation from the explanatory words about the speaker. Put the comma after the explanatory words and before the quotation marks when they lead into a quotation. Use a comma to separate an introductory element from the rest of the sentence. Commas are needed to separate a city from a country, state, or province. Commas are also needed to separate the day of the week, the day of the month, and the year. Put commas where they belong in the following sentences.