This document discusses English tenses and their uses. It explains that tenses indicate the time of an action and are divided into present, past, and future. The present tense describes current or habitual actions. The past tense refers to completed actions in the past. The future tense indicates actions that will occur. Each tense has simple, continuous, perfect, and perfect continuous forms that provide different temporal meanings about an action. Examples are provided to illustrate the structures and uses of each tense.