The document discusses the simple past tense in Portuguese. It notes that the simple past is used to talk about completed past actions and events. It provides examples of common time expressions used with the simple past, such as "yesterday" and "last week." It then explains how the simple past is formed for regular verbs by adding "-ed", "-ied", or "-d" and how irregular verbs are used without following a set pattern. Examples are provided to illustrate both regular and irregular verb usage in the simple past tense.