Pronouns are words that replace a noun in a sentence.
Subject: I, you, he/she/it, we, they
These pronouns are the subject of the sentence or clause, that is, they perform the action of the verb.
Object: me, you, him/her/it, us, them
These pronouns are the object of the sentence or clause, that is, they receive the action of the verb.
Possessive: my (mine), your (yours), his/her/its (his, hers, its) our (ours), their (theirs)
These pronouns show ownership of a noun.
Reflexive: myself, yourself, himself/herself/itself, ourselves, themselves
These pronouns are used when the subject and the object are the same person or thing.
Relative: who, whom, whose, which, that
These pronouns are used to describe or modify a noun.