Direct address
When a sentence shows someone being directly spoken to
Lists
When a sentence contains a list of three or more ideas
Dependent clauses
Cannot stand alone. they contain a fragmented thought.
Dates
A comma that goes next to the day and the year.
Appositives
Give more information about a noun that comes right before them.
Coordinate adjectives
When two or more adjectives can be placed in any order before the noun.