Pronouns take the place of nouns and are used to avoid repeating the noun, with the word replaced called the antecedent. Examples show that "Halloween" is replaced by "it" and "Robert" is replaced by "he". Personal pronouns refer to people or things and include I, me, my, we, us, our, he, him, his, she, her, hers, it, its, they, them, their, which can be categorized by person, number, and case.