This document provides information about different professions and exercises related to using forms of the verb "to be" in English. It lists professions such as doctor, pilot, dentist, engineer, nurse, sailor, teacher, artist, singer, driver, worker, and more. It then provides exercises for students to practice identifying errors and correcting sentences using correct forms of "to be". The exercises also involve filling in blanks with "am", "are", "is" based on the subjects of sentences. It concludes with examples of letters from children talking about their mothers and mothers' professions.