Unit 3 Food and Culture Learning about language 语法（ppt课件）-2024新人教版（2019）《高中英语》选择性必修第二册.pptx

1、现在完成时与过去完成时的区别现在完成时与过去完成时的区别The present perfect tense&The past perfect tenseI have waited here for an hour.She has waited here for an hour.现在完成时的构成：现在完成时的构成：have/has(not)+done现在完成时的概念：现在完成时的概念：1.表示表示过去过去发生的动作发生的动作对现在造成对现在造成影响影响；I have seen the film many times，so I wont go with you.2.表示表示过去过去某一时间开始一直

2、某一时间开始一直延续延续到现在到现在的动作。的动作。He has lived here since 1949.现在完成时的用法：现在完成时的用法：1.现在完成时现在完成时强调过去动作与现在的联强调过去动作与现在的联系系,也就是也就是强调现在的影响和结果强调现在的影响和结果，故常与，故常与表示包括现在在内的时间副词，如表示包括现在在内的时间副词，如recently,just,already,before,yet,never,ever等状语连用等状语连用eg.I have never heard of that before.She has already known the news2.常与常与

3、for或或since引导的时间连用，这引导的时间连用，这时动词需使用时动词需使用延续性延续性动词动词for+一段时间一段时间 eg.He has lived here for 5 years.since+（表示过去某一时（表示过去某一时间的）时间点间的）时间点 eg.He has been here since 5 years ago.其他标志语：如：so far,up to now,by now,since then,these days,in the last/past few days/years 现在完成时的用法：现在完成时的用法：3.句型 This/It is the first/s

4、econd/.time(that).也常与现在完成时连用 现在完成时的用法：现在完成时的用法：This is the third time that he has driven a car.构成：助动词构成：助动词had+动词的过去分动词的过去分词（词（V.pp)用法：用法：1.过去完成时动词表示过去某一时间或某过去完成时动词表示过去某一时间或某一动作之前完成的动作或状态。强调过去一动作之前完成的动作或状态。强调过去某一动作发生在另一动作之前时。某一动作发生在另一动作之前时。在强调过去某一个动作发生在另一个动作前常常用在强调过去某一个动作发生在另一个动作前常常用过去完成时态。过去完成时态。1.

5、他说他以前见过你。他说他以前见过你。He said that he _(see)you before.had seen2.到六点钟为止他们已经工作八小时了。到六点钟为止他们已经工作八小时了。By six oclock they _(work)for eight hours.had worked过去分词的构成：1.规则动词的变化：a)一般情况下在动词后面加 ed work-worked play-playedb)以 e 结尾的动词直接加 d use-used refuse-refusedc)以辅音字母加 y 结尾的动词，把 y 改 i 再加 edstudy-studiedcarry-carrie

6、dd)以重读闭音节结尾的，前面有单个元音字母时，双写辅音字母，再加 edstop-stoppeddrop-dropped2.不规则动词的变化见不规则动词表过去完成时的构成过去完成时的构成：由助动词：由助动词had+动词的过去分词（动词的过去分词（V.pp)2.过去完成时词可以表示过去某一过去完成时词可以表示过去某一时刻之前发生的动作或呈现的状态，时刻之前发生的动作或呈现的状态，这一动作一直持续这一动作一直持续 或将继续下去。或将继续下去。By six oclock they _(work)for eight hours.When I came to GZ,he _(be)there for a

7、 long time.用法：用法：1.到了六点钟为止，他们已经工作了八小时了。到了六点钟为止，他们已经工作了八小时了。2.我到广州时，他在那里很长时间了。我到广州时，他在那里很长时间了。had workedhad been3.到上个月中旬我们在北京住了有五年时间了。到上个月中旬我们在北京住了有五年时间了。By the middle of last month we _(live)in Beijing for five years.had lived1.到昨晚上，他已写完那封信。到昨晚上，他已写完那封信。By yesterday evening he _(write)that letter.2.

8、他说他以前见过你。他说他以前见过你。He said that he _(see)you before.3.当我进来时，他已做完了作业。当我进来时，他已做完了作业。When I came in he _(finish)his homework.过去完成时与过去完成时与 by then(截止到那时截止到那时);by 9 oclock(直到直到九点钟九点钟)by the end of(在在结束结束/末之前末之前);by the time(在在时之前时之前);up till then(直到那时直到那时);up until last night(直到昨晚）等连用，表示过去的过直到昨晚）等连用，表示过去的

9、过去。去。had writtenhad seenhad finished3.过去完成时和过去完成时和 already,just,ever,yet 等连用表示过去的过去。等连用表示过去的过去。用法：用法：例如：例如：1.他告诉我说他们队已经赢了。他告诉我说他们队已经赢了。He told me that his team _ already _(win).hadwon2.她说她仍没去过长城。她说她仍没去过长城。She said that she _(not be to)the Great Wall yet.hadnt been to用法：用法：过去完成时与过去完成时与when,before,as

10、soon as,till/until 等引导时间状语的从句连用，等引导时间状语的从句连用，强调动作发生的时间前后。强调动作发生的时间前后。例如：例如：1.她到家之前她的孩子已经睡着了。她到家之前她的孩子已经睡着了。When she got home her children _(sleep).had slept2.在他们到达之前电影已经开始了。在他们到达之前电影已经开始了。Before they arrived here the film _ already _(start).hadstartedLast night,as soon as I _(finish)my work I went t

11、o sleep.3.我完成作业了就去睡觉了。我完成作业了就去睡觉了。had finished句型 This/It was the first/second/.time(that).常与过去完成时连用 用法：用法：It was the first time that she _ (live)independently.had lived1.After he _(finish)his work he went out.had finished2.The children ran away after they _(break)the window.had broken3.I went to Tom

12、s house but he _(go)out.had gone4.Annie told me that his father _(go)to Paris and he _(come)back in a few days.had gonewould come5.My friend _(buy)the car two years ago.He _(buy)it for two years.boughthas had6、had left 7、had finished 8、had studied 9、has been 10、has risen 11、hadnt seen 12、had gone 13

13、、have been 14、have been built 15、didnt read 1.When Li Ming hurried home,he found that his mother _already _to hospital.A has;been sent B had;sent C has;sent D had;been sent 2.We _five English songs by the end of last term.A had learned B learned C have learned D will have learned 3.Billy told me she

14、 _lunch,so she was very hungry.A has had B hasnt have C have had D hadnt had 4.By the end of 1976,many buildings _built in the city.A have been B have C had been D will 5.She _her keys in the office so she had to wait until her husband _home.A has left;comes B had left;would come C had left;came D l

15、eft;had come 6.He said that it was at least ten years since I _a good drink.A had enjoyed B was enjoying C have enjoyed D have been enjoying 7.The meeting _when Mr.Wang _to school.A has begun;get B has been on;get C had begun;got D had been on;got 8.I _900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt