Subject pronouns are those pronouns that perform the action in a sentence. They are I, you, he, she, we, they, and who. Any noun performing the main action in the sentence, like these pronouns, is a subject and is categorized as subjective case (nominative case). English grammar requires that the subject come before the verb in a sentence (except in questions).
Object pronouns are those pronouns that receive the action in a sentence. They are me, you, him, her, us, them, and whom. Any noun receiving an action in the sentence, like these pronouns, is an object and is categorized as objective case.* An object pronoun can also be used after prepositions, i.e. “I will go with him.” In this article, we will only focus on nouns as recipients as these are the most frequently confused. With few exceptions, English grammar requires that objects follow the verb in a sentence.