The document discusses the simple past tense in English. It defines the simple past as a verb tense used to describe actions that were completed in the past. It provides examples of sentences using the simple past, such as "She cleaned her house." The document outlines characteristics of the simple past tense and describes how it is formed for both regular verbs by adding "-ed" and irregular verbs which must be memorized. It lists common irregular past tense verbs such as "see/saw" and "go/went" and provides practice sentences for readers.