The document defines and discusses the simple past tense in English. The simple past tense expresses actions that occurred at a specific time in the past or were habitual in the past. It is formed using the base verb form plus "-ed" and is used to describe single events or sequences of events that were completed in the past. Examples are provided to illustrate how the simple past is used in both active and passive sentences, with the passive using "was/were" plus the past participle form of the verb.