An object pronoun is a pronoun that receives the action of a verb. It's used in place of a noun when that noun is the direct object, indirect object, or object of a preposition.
Here are the object pronouns in English:
* me
* you
* him
* her
* it
* us
* them
Examples:
* Direct object: "The dog chased him." (Him receives the action of chasing)
* Indirect object: "She gave him a book." (Him receives the book)
* Object of a preposition: "I went to the store with them." (Them is the object of the preposition "with")
Let me know if you'd like more examples or have other questions!