This document discusses the simple past tense in English. It explains that the past tense is used to talk about actions that started and finished in the past. For regular verbs, the simple past tense is formed by adding "-ed" to the base form of the verb. Examples of sentences using regular verbs in the past tense are provided. It also discusses how to form negative sentences in the past tense using "didn't" or "did not" plus the base form of the verb.