This document discusses the verb "to be" in English. It is one of the most commonly used yet complex verbs as it has many forms. The verb "to be" is used to describe something or someone, especially in terms of names, ages, feelings, nationalities, and professions. The document provides examples of affirmative, negative, and question forms of the verb "to be" in both full and contracted forms. It also provides examples of how to use the verb "to be" in different sentences.