This document discusses subject and object pronouns. It defines subject pronouns as those in the nominative case used as the subject of a sentence, listing common subject pronouns as I, you, he, she, it, we, and they. It defines object pronouns as those in the objective case used as the object of a verb or preposition, listing common object pronouns as me, you, him, her, it, us, and them. Examples are provided to illustrate the difference between subject and object pronouns. The document emphasizes memorizing these pronouns to properly identify them in sentences.