This document provides information about describing what a person does using personal pronouns and the verb "to be". It gives examples of common professions like waiter, cashier, teacher, and secretary. It explains how to use personal pronouns like I, you, he, and she with the verb "to be" to indicate someone's profession. It also discusses using the articles "a" or "an" depending on whether the profession starts with a vowel or consonant sound. The document concludes with exercises for practice using these structures to talk about different professions.