This document provides a summary of the present perfect tense in English. It discusses how the present perfect connects past events to the present, and how it is used to talk about new information, unfinished past actions, and experiences that occurred at unspecified times in the past. It also covers the structure of the present perfect in affirmative, negative, and interrogative forms. Finally, it examines the use of words like "already", "yet" and "just" when using the present perfect tense. The overall document serves as a grammar reference and lesson on the present perfect for English language learners.