Present perfect tense现在完成时态 8BUnit 2 Grammar 2用法 1 ：现在完成时态的含义是表示过去发生的或已完成的动作对现在造成的影响或结果。特点是既涉及过去，又联系现在：动作是过去发生的，结果是现在存在的。 Look! The blackboard is so clean now. He has cleaned the blackboard. ( 他已经擦过黑板了。 ) 这句话所表示的结果是黑板现在是干净的。Exercise: Fill in the blanks with the right verb tense: • 1. It ____________ （ rain ） for a week.• 2. I don’t know this woman. I ____________ （ meet, never ） her. • 3. － Let’s go to the cinema. － No, I______________ （ see, already ） the film.• 4. We______________ （ finish, not ） our homework yet. Will you wait a minute?• 5. John __________ （ come, not ） yet. He will be back in a minute. has rainedhave never methave already seenhaven’t finishedhasn’t come• 6. Mr. Green often goes to America. In fact, he ___________ （ be ） there ten times.• 7. － Where’s John? － He______ just _____ （ go ） to the teachers’ office.• 8. She ___________ （ study ） English since she was ten. She ________ （ begin ） to study English when she was ten.• 9. Jim isn’t here. He ________ （ go ） to the library. He __________ （ go ） there an hour ago.• 10. They ________________ （ travel, never ） on a train.has been has gonehas studiedbeganhas gonewenthave never traveled用法 2 ：表示动作或状态从过去开始一直延续到现在甚至将来Mike borrowed the books two days ago.Mike has kept the books for two days.1.We have learnt English_____ 3 years. ______ 3 years ago._____ we _______(come)hereforsincecame_______________________How long have you learnt English?5. for + 一段时间 since + 过去的时间点 就画线提问用 how long想一想since标志词： for + 一段时间 , since+ 过去的时间点 , these years, so far,...
