精选优质文档-倾情为你奉上Present Perfect Tense1. The present perfect tense used to talk about things that happened before the time you are speaking or writing but are relevant to the present situation, or things that began in the past and are still happening.2. Structure:Thepresent perfect tenseis formed withhave/has + done, as in, “They have decided what to do.3. Signal words:When you see words likefor, since, never, ever, already, just, yet andso farin a sentence, it often means tha
