I add extra information to a noun. I must be between commas.
An Appositive
I separate items in a list.
Comma ,
I am a person, place, thing, or idea.
Noun
I am used when the doer of the action is unknown, or not important.
Passive voice
I go at the end of a sentence when you are excited about something.
Exclamation mark !
I am a part of speech that shows an action.
Verb
I start with "that," "which," or "who" to describe a noun.
Relative clause
I go before and after a sentence to show that it is not your own words.
Quotation marks "
I am used to join clauses or sentences.
Conjunctions
I am used when you want to talk about an action without doing the action.
Gerund
I can go before a conjunctive adverb or between two clauses to separate them. I am not a period.
Semicolon ;
I describe nouns.
Adjective
I am used to describe an action that started in the past and continues into the present.
Present perfect tense
I go before and after in-text citations and things that are less important.
Parentheses ( )
I am a phrase used to show time, place, and purpose.
Prepositional phrase