Final answer:
Pronoun case refers to the grammatical function of the pronoun in a sentence. Subjective case pronouns function as subjects, objective case pronouns function as objects, and possessive case pronouns show ownership.
Step-by-step explanation:
Pronoun case refers to the grammatical function of the pronoun in a sentence. Pronouns that are the subjects (the person, place, or thing that performs the action of the verb or represents what or whom sentence is about) of a sentence are written in the subjective case. For example: I like pizza. Pronouns that are objects (nouns or pronouns affected by the action of a verb) of a sentence or preposition are written in the objective case. For example: Laura gave him the baseball. Jorge and Toby were standing in front of us in line.
Last but not least, possessive pronouns show ownership and are written in the possessive case. For example: The cat picked up its toy. Those notes are his and mine.
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