This document provides examples of using the verbs "to be" in simple present, simple past, and simple present and past tenses. It covers the forms "is, am, are" and "was, were" in affirmative sentences with subjects like people, places, things. Examples include "Ahmad is in the classroom", "They were at the canteen", and "My uncle is now an engineer." The document aims to illustrate correct usage of common linking verbs in English.