This document discusses verb tenses and how they indicate time. It explains that the present tense is used for actions that happen regularly or general truths. For regular verbs, the base form is used for singular subjects and "s" is added for plural subjects. The past tense is formed by adding "ed" to most verbs and indicates actions that already happened. The future tense is formed by adding "will" or "shall" to the base verb form and names actions that will occur in the future. Examples are given of verbs in the present, past and future tenses.