Here are some examples of pronouns:
* Personal pronouns: I, you, he, she, it, we, they
* Possessive pronouns: mine, yours, his, hers, its, ours, theirs
* Reflexive pronouns: myself, yourself, himself, herself, itself, ourselves, yourselves, themselves
* Demonstrative pronouns: this, that, these, those
* Indefinite pronouns: someone, anyone, nobody, everything, nothing
Examples:
* Noun: The dog barked at the cat.
* Pronoun: The dog barked at it.
* Noun: John went to the store.
* Pronoun: He went to the store.