This document discusses the simple past tense in English. It explains that there are regular verbs, which form the past tense by adding "-ed", and irregular verbs, which have varying past tense forms that must be memorized. Regular verbs can have the "-ed" pronounced as a "t", "d", or "id" sound. The document provides examples of regular and irregular verb conjugations in both positive and negative simple past tense sentences. It emphasizes that the past tense is used to describe actions that are completed in the past.