The document discusses the simple past tense and past continuous tense in English. It provides rules for forming the regular and irregular past tense of verbs for affirmative, negative and interrogative sentences. Examples are given for using the simple past tense to talk about completed actions at specific times in the past. The past continuous tense is used to describe actions that were ongoing or in progress at a certain time in the past. Time expressions that are used with each tense are also outlined.