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1、Unit1 Grammar,Present perfect tense & present continuous tense,past,now,Yesterday , wecleaned theclassroom.,Now , the classroom is clean because we have cleaned it.,用法1,强调过去发生的动作对现在产生的结果或影响,现在完成时,1. My father bought many books for me yesterday .Now , I have a lot to read because _ 2. I saw this film
2、 last week. Now, I know this film because I_. 3. I did my homework yesterday.Now, I can give it to the teacher because I_,my father has bought many books for me.,have seen it before,have done it.,“仍然，还 ” 用在疑问句和否定句中，放在句末。 I havent read this book yet . Have you had breakfast yet ?,already:,Yet:,“已经”通常
3、用于肯定句中,放在句中。I have already read this book. 有时，也用在疑问句中表示惊讶。Have you eaten up all the food already ?,“从来不” 用在否定句中,放在句中。 Is he famous ?I have never heard of him .,ever,never,“曾经”通常用于疑问句和肯定句中,放在句中。I have ever seen this film. Have you ever been to the USA ?,“以前”用在完成时中，放在句末。 have never read this kind of b
4、ooks before.,just,before,“刚刚 ”用在陈述句中,放在句中。I have just bought a novel。,She began to work in 2005. She still works here now. She has worked at this school for 9 years.,now,past,I began to teach English at this school five years ago.,I have taught English at this school for five years.,用法2：,过去发生的动作一直延续
5、到现在。,1. I am a doctor. I began to work when I was 22.Now , I am 26. I _ for four years. 2. We went to the USA last Monday. Today is Monday . We _ (stay) in the USA since last Monday.,have worked,have stayed,since and for,The woman has worked at this school for 2 years.( since two years ago),since 2
6、years ago,since 1998,since she came to the school),for + 时间段,since+时间点,for 2 years/a long time,一、用for和since填空。,_three hours _three oclock _two days _yesterday afternoon _I came here _last Sunday,_a week _a long time _1997_two weeks _three years ago_ last month,for,since,for,since,since,since,for,for
7、,since,for,since,since,Exercise 根据所给情况，用just,already或yet造句。 1.After lunch you go to see a friend at her house.She saysWould you like something to eat? You say: No, thank you. _( have lunch ) 2.Joe goes out. Five minutes later,the phone rings and the caller says Can I speak to Joe? You say: Im afraid
8、 _.( go out ),he has just gone out,Ive just had lunch.,3.You are eating in a restaurant this evening. The waiter thinks you have finished and starts to take your plate away.You say: Wait a moment !_( not / finish ) 4.You are going to a restaurant this evening. You phone to reserve(预定）a table. Later
9、your friend says Shall I phone to reserve a table? You say: No,_ it (do),I havent finished it yet.,I have already done,1.现在完成时用来表示过去发生或已完成的动作或状态对现在造成的影响或结果,也就是说,动作或状态发生在过去但它的影响现在还存在. I have lost my wallet.(含义是:现在我没有钱花了.) Jane has just had breakfast.(含义是:简现在不饿了.) Michael has been ill.(含义是:现在仍然很虚弱) He
10、 has returned from abroad. (含义是:现在已在此地),2. 现在完成时可以用来表示发生在过去某一时刻一直持续到现在的动作和状态,常与表示持续的时间状语连用. 表示持续动作或状态的动词多是延续性动词。I havent seen her these days. Mary has been ill for three days. I have lived here since 1998.,3. 现在完成时往往同表示不确定的过去时间状语连用,如already, yet, just, before, recently, still, lately等标志词He has alrea
11、dy got a chance to go abroad. I havent seen much of him recently (lately). We have seen that film before. Have they found the missing child yet ？,4. 现在完成时常常与表示频度的时间状语连用,如often, sometimes, ever, never, twice, on several occasion等: Have you ever been to Beijing？ I have never heard of Bunny. I have use
12、d this pen only three times. George has met that gentleman on several occasions.,5. 现在完成时还往往可以同包括现在时间在内的时间状语连用,如now, just, today, this morning/week/month/year, up to these few days/weeks/months/years, up to present, so far等: Peter has written six poems so far. Man has now learned to make use of natu
13、ral materials. There has been too much rain in San Francisco this year. Up to these weeks, everything has been successful.,have (has) gone和have (has) been的区别,1.have (has) gone表示“已经去某地了” She has gone to Shanghai .(她可能已在去上海的路上，或已到上海，总之现在不在这里。),2.have (has) been表示“曾经去过某地” She has been to Shanghai three
14、 times.(她已经不在上海，只说明她曾经去过。),非延续性动词不能与时间段连用： go/come/begin/start/die/buy/borrow/sell/leave/arrive/ receive/become等词语是瞬间动词表示的动作是一时的，不能延续，不能与for、since等表示一段时间的词连用，也不能用于how long引导的疑问句中。 如不能说：He has borrowed the book for two months.() 但可以说：He has kept the book for 2 months. 或：It has been 2 months since he
15、borrowed the book. 或：Two months has passed since he borrowed the book.,这些瞬间动词常与它对应的可以表示时间段的词语进行互换。 becomebe borrowkeep buyhave begin (start)be on openbe open diebe dead leave-be away come-be here/in go outbe out join-be a member/be in begin to study-study,注明：非延续性动词在否定结构中可用于现在完成时态：I havent bought anything for two days.,现在完成进行时,通常使用现在完成进行时的几种情况： 1.表过去开始的动作持续到现在并仍在继续中 She has been talking to me since she saw me.2.表示过去开始的动作刚结束并在某种情况下与现在有关联 Sorry, Im late, have you been waiting long? Yes, I have been waiting for an hour.,
