A basic rule for using commas include putting commas directly before a conjunction to separate two independent clauses. Commas are also used after introductory words, phrases and clauses. Another basic use of commas is to separate information that interrupt or provide information within a sentence.
Commas are usually used when separating items in a list and writing dates and addresses. Another rule for using a comma is to introduce or end a quote within a sentence. Commas are used in many different contexts and languages, and mean "something cut off or a short clause." Commas are written with the same shape as an apostrophe or as a single quotation mark.