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1、welcome,The present perfect tense(现在完成时）,Basic structure(基本结构):,主语+have/has(助动词）+done（动词的过去分词）,一般疑问句：,Have /Has +主语+ done ?,否定句：,主语+havent/ hasnt + done,1.I have cleaned my room.,Have you cleaned your room?,I havent cleaned my room.,2. He has gone to the travel agency.,Has he gone to the travel agen
2、cy?,He hasnt gone to the travel agency.,现在完成时可用来表示：,1过去发生的动作对现在造成的影响和结果。 标志词:,already yet ever just never recently in the last few days/weeks/months/years so far 无标志词,已经，,用于肯定句中,还，尚，,用于疑问句和否定句中,曾经,刚刚,从未,近来,在过去的几天周月年里,迄今为止,有never的句子是否定句,不能再出现not,多用于疑问句，问初次经历。,多用于陈述句，位于have/has后,-where is she? -She _
3、(go) to the library.,has gone,Lets try,3. We _ (build) a lot of new buildings in Shanghai recently.,has already finished,1.He _ (already finish) his work, but I _ (not finish) mine yet.,havent finished,2. Great changes _(take) place in Shanghai in the last few years.,have taken,have built,4. Jack is
4、nt here._he _ (go) to the park? 5. Lucy _just_ (wash) her clothes. 6. _your father ever _ (speak)to a foreigner? 7.We_never_(meet)such a tall man. 8.I_ (lose)the key. I cant go into my room.,Has gone,has washed,Has spoken,have met,have lost,发生在过去并一直延续到现在的动作或状态。 标志词:,for +一段时间 since+ 过去的时间名称 since +
5、过去时的句子 since +一段时间+ago,for a week, for five hours,since last year, since 1993,since I was five.,1.Li Hui _ (not work) here for ten years.,2. I am living in Shanghai. I _( live) here since I was born.,have lived,hasnt worked,3._Tom _(write) six letters to his parents since two months ago?,4.A: How lo
6、ng _ you _(be) in Shanghai? B: For two weeks.,have been,Has written,since two years ago,要用 延续性 动词,选用for和since填空: 1.We havent seen each other _ a long time. 2.He has been in the factory _ 10 years ago. 3.The film has been on _ 20 minutes. 4.Mr Green has worked here _ he came to China. 5.His grandpare
7、nts have been dead _ several years. 6. Its five years _ we met last time,for,since,for,since,for,since,常见的瞬间性动词改成延续性动词,leave buy borrow begin finish join die come/go to+地点 open close get up,be away (from),have,keep,be on,be dead,be a member of be in,be in +地,be open,be closed,be over,be up,改错：,1. I
8、have bought this book for a week.,_,I have had this book for a week.,2. The film has begun since ten minutes ago.,_,The film has been on since ten minutes ago.,3. Tom has gone to Shanghai twice.,_,Tom has been to Shanghai twice.,4. A: Where is Jack? B: He has been to the library.,_,He has gone to th
9、e library.,现在完成时注意三个分清： 分清 have(has) been to have(has) been in /at have (has) gone to,eg - She has been to Shanghai twice. eg - She has been in Shanghai for two years. eg - She has gone to Shanghai.,表示某人曾经去过某地（与次数有关）,表示某人去了某地并呆在那里一段时间(与一段时间有关）,表示某人去了某地人不在这里（你和我不能用）,Exercises:,He joined the army five
10、 years ago.（句意不变） He_ the army for five years.,has been a member of,2. I have never seen such an interesting film,_?,have I,3. Tom has taught English since he came here.,How long has Tom taught English?,4. His grandma died a week ago.(句意不变) His grandma _ for a week.,has been dead,5.I have been here
11、since ten minutes ago.(句意不变) I _here ten minutes _.,_,_,How long has his grandma been dead?,came,ago,WRITING,Use the picture and the given words to write at least 50 words about the topic“Great Changes in Shanghai.” (Try to use the present perfect tense as often as possible.),change, build, plant, take place, recently, in the last few years, trees, flowers,buildings,Thank you !,