This document provides instruction on using the adverbs "ever" and "never" in the present perfect tense in English. It explains that "ever" is used in questions to ask about experiences in someone's life, such as "Have you ever ridden a horse?" It also explains that "never" is used to talk about things that have not been done, like "I have never eaten raw fish." The document concludes with exercises asking the reader to form sentences using "ever" and "never" in the present perfect.