Pronouns are words that replace nouns, and they must agree with the noun they're replacing in person, number, and gender. Here's a breakdown:
* Person: First person (I, we), second person (you), third person (he, she, it, they)
* Number: Singular (he, she, it) or plural (they)
* Gender: Masculine (he), feminine (she), or neuter (it)
Examples:
* "The cat chased its tail." "Its" replaces "cat" and agrees in number (singular) and gender (neuter).
* "The students finished their assignments." "Their" replaces "students" and agrees in number (plural).
Let me know if you'd like more examples or information on pronouns!