A pronoun is a word that is used in place of a noun. Words like "I," "you," "he," "she," "us," and "them" are pronouns.
Example: Rachelle bought a magazine.
The word “Rachelle” is a noun in this sentence. You can replace “Rachelle” with a pronoun.
Example: She bought a magazine.
The word “she” is a pronoun that can replace the noun “Rachelle.”
Antecedent
An antecedent is the word or words that a pronoun refers to (or talks about).
Example: Josey plays the guitar. She is in a band.
The pronoun “she” is referring to (or talks about) the word “Josey” in the first sentence. “Josey” is the antecedent.
Pronoun-Antecedent Agreement
A pronoun and its antecedent have to agree.
Singular pronoun → singular antecedent
Example: Michael likes to fly his kite.
The pronoun “his” is referring to (or talks about) the antecedent “Michael.” “Michael” is singular, so the pronoun “his” must be singular as well.
Plural pronoun → plural antecedent
Example: Joe and Steven are watching their favorite show.
The pronoun “their” is referring to (or talks about) the antecedents “Joe” and “Steven.” The antecedent is plural, so the pronoun “their” must be plural as well.
3rd Grade Writing - Pronoun-Antecedent Agreement Lesson