This document discusses the simple past tense in English. It provides examples of how the simple past is used to talk about completed actions and past habits in sentences using time expressions like "last week", "yesterday", and "a long time ago". It also covers the regular formation rules for the simple past tense, including adding "-ed" to regular verbs and doubling consonants or changing "y" to "i" for some irregular verbs. Finally, it notes that the auxiliary verb "do" is used for negative and interrogative forms of the simple past of the verbs "do" and "have".