This document provides information on the uses of different tenses in English, including the present simple, present continuous, present perfect simple, and present perfect continuous. It explains that the present simple is used for repeated or habitual actions, facts, and non-continuous actions happening now. The present continuous is used for temporary actions, changing states, irritating actions, and things happening now. The present perfect simple is used for recently finished actions with results, actions done multiple times in the past, and talking about experience up to the present. The present perfect continuous is used with state verbs, unfinished ongoing actions, and finished actions with remaining evidence.