The document discusses the simple past tense in English. It defines the simple past tense as used to talk about a completed action in a time before now. It provides examples of its use and how to form the simple past tense affirmatively, negatively, and interrogatively for regular and irregular verbs. It also discusses time expressions used with the simple past tense, such as frequencies, definite points in time, and indefinite points in time. An exercise is included asking the reader to fill in blanks with the simple past form of given verbs.