Commas are the most frequently used punctuation mark in English. Originally used to show a pause, they are used nowadays in a variety of situations to make writing clearer.
Click on the topic below for more specific comma rules.
The Three Most Common Comma Rules
Commas After Introductory Phrases
Commas After Introductory Clauses
Commas with Interrupting Expressions
Commas with Nonrestrictive Modifiers
Commas with Geographical Names
Commas with Titles that Follow Names
Commas with Certain Words Omitted
Commas with Adjectives Following Nouns