The document defines and provides examples of the simple present, past, and future tenses in English. It explains that the simple tense is the basic tense used to express actions or states that occur at a specific time without additional complexity. It then discusses the simple present tense and how it describes routine or habitual actions. Next, it covers the simple past tense and how it expresses events that occurred in the past. Finally, it addresses the simple future tense and how it is used to talk about events that have not happened yet and will occur in the future.