This document contains a grammar exercise with multiple parts providing examples of using different verb tenses including:
1. The present continuous tense is used to describe actions happening now in sentences about trying to read, not using a computer, and teaching lessons.
2. The present simple and continuous tenses are used to describe habitual and ongoing actions such as belonging to a committee and coming buses.
3. The past simple and past continuous tenses are used to talk about completed actions like bringing food to a party in the past and asking about a friend's recent holiday activities.