Punctuation is a mark that makes a meaning of a sentence clear.
One of the most common punctuation marks is the comma. A comma (,) is used
within a sentence. It is used to separate parts of a sentence. It is also used
when listing words.
Comma Used to Separate Clauses
A comma is used to separate clauses. Commas are often used in sentences that
have coordinating conjunctions.
·   My friend is moving, so I'm going to help him pack.
·   I want to see a movie, but I'm very tired.
·   Unless you have a valid driver's license, you cannot
rent a car.
·   After I leave the house, my dog jumps on the bed.
Comma Used to List Series of Words
A comma is used when listing a series of words adjectives, nouns, and verbs.
·   He is young, smart, and handsome.
·   I need to buy bread, potatoes, cheese, and carrots at
the store.
·   The ballerina leaped, twirled, and landed on the ground
perfectly.
Comma Used to Separate Clauses
Commas are used to separate nonrestrictive appositive nouns. A nonrestrictive
appositive noun is separated by a comma or placed in between two commas.
·   My mom, Linda, is a chef.
·   I am meeting with the school principal, Mr. James.
·   Buddy, the Scottish terrier, is scared of cats.
Comments