This document discusses the simple past tense in English. The simple past refers to actions that were completed in the past. For regular verbs, the simple past is formed by adding "-ed" to the base verb. However, there are also many irregular verbs with unique past tense forms. The auxiliary verb "be" has the past tense forms "was" and "were", while other verbs use "did" as an auxiliary verb to form questions, negatives, and emphatic statements in the past tense. Examples are provided to illustrate the different uses of the simple past, including for single past events, habitual past actions, and past states.