The pronoun 'us' is the first person, plural, objective personal pronoun; a word that takes the place of a plural noun or pronoun (or two or more nouns or pronouns) as the object of a verb or a preposition.The corresponding first person, plural, subjective personal pronoun is 'we'.Example sentences:It's maintenance ma'am. You called us because the intercom isn't working. (direct object of the verb 'called')The lady was very nice. She made coffee for us. (object of the preposition 'for')Yes, we did get the intercom working. (subject of the sentence)