What are Object Pronouns? In the last lesson, we learned that objects are nouns that are affected by the action of a verb in a sentence. Just like subject pronouns can replace the noun doing an action in a sentence, object pronouns can replace a noun on which the action is being done. In other words, an object pronoun is a word we use instead of a noun that is affected by an action. For example, instead of saying Kim likes Barbara, we could say Kim likes her. Here are the object pronouns: me you