This document discusses verb tenses and how verbs change in the past tense. It provides examples of regular verbs that take "ed" to indicate the past tense, such as "walk" becoming "walked". For verbs ending in "e", only the "d" is added to form the past tense, like "save" becoming "saved". Students are given practice identifying the correct past tense forms of verbs using these rules to talk about events in the past.