This document discusses verb tenses in English. It defines tenses as verb forms that indicate time and aspects such as whether an action is ongoing or completed. There are 12 possible tenses when categorizing by time (present, past, future) and aspect (simple, continuous, perfect, perfect continuous). Each tense is defined and examples are provided, such as the present continuous ("I am playing") describing an ongoing present action. Overall, the document provides a comprehensive overview of English verb tenses, their definitions, and examples to illustrate usage.