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1、ThePresentTense,英语课件,一.表示从过去某一时刻开始并一直延续到现在的动作或事情,但动作或事情现在已经结束。,eg：1. Someone has just turned off the light.,有人刚把灯关了。,2. I have already finished my homework.,我已经完成了家作。,二.表示从过去某一时刻开始并一直延续到现在的动作或事情,但动作或事情可能仍在继续。,eg：1. I want to see how much the place changed since I saw it last.,我想看看从上次见到那地方以来它发生了多大变化。
2、,2. I have learnt English for more than ten years.,我已经学了10多年的英语。,三.表示人曾有过或到目前为止从未有过的经历.,eg：1. Have you ever been to the Summar Palace?,你曾去过颐和园吗?,2. I have never had a car.,我从未有过汽车。,四.现在完成时还常与句型 This is the first time，Its the first time 连用。,eg：1.This is the first time he has driven a car .,这是他第一次开车。,
3、五.现在完成时和最高级连用表示到现在为止是最的。,What a boring film！,Its the most boring film Ive ever seen.,现在完成时除了上述主要用法之外，还有一些其它用法，在此不一一讲解，请学生自已学习、掌握。,一部多么令人厌烦的电影啊！,这是我看过的最令人厌烦的电影。,现在完成时与一般过去时的区别,第一单元已讲解了现在完成时，在第一册中也已讲解了一般过去时的主要用法。现将这两种时态的用法加以区别，以便使学生更好地掌握，区别两者的不同用法。,一.现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身，而是强调事情与现在保持的某种密
4、切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只表示发生在过去的动作和事情与现在没有关系。,eg：1. He has bought an English-Chinese dictionary. 他已经买了一本英汉字典。,eg：2. He bought an English-Chinese dictionary. 他曾买过一本英汉字典。,第一句用现在完成时时态，意为：“He bought an English-Chinese dictionary. And he still has it” “过去他买了一本英汉字典，现在他还有这本字典” 。,第二句用过去时只叙述过去他买过一本英
5、汉字典这一事实，至于现在他是否有这本字典并未强调说明。,二当有一个表示过去某一特定时间的状语时，不用现在完成时，而用一般过去时:,eg：1. I saw the film on television yesterday .,但since(自以来)+某一过去时间或叙述过去事情的从句总是与现在完成时连用。,eg：1. They have known each other since 1950 .,2. Since he was a child,he has lived in England.,三常与一般过去时连用的典型的表示过去时间的状语,yesterday(昨天),the other day (
6、前两天),just now(刚才)， 时间+ ago,last +时间 ; etc;,eg: 1. The plane took off ten minutes ago,飞机十分钟前起飞了。,eg: 2. We finished our task last week .,我们上周完成了我们的任务。,四常与现在完成时连用的表示到现在为止这段时间的词短语或从句:,so far (到现在为止)，up to (till,until)now直到现在，lately（最近）yet ,since+过去时间或叙述过去事情的从句。,eg：1. The weather has been hot so far thi
7、s summer,到目前为止，今夏天气一直很热。,2.I havent seen her yet .,我还未见到过她。,五可与现在完成时连用，也可与一般过去时连用 的时间状语：,for +时间 ，this +时间,表示不确定时间： ever,never,before,just,recently,already,eg: 1.I have learnt English for three years.,我学英语（到现在）三年了（仍在学）。,2.I learnt English for three years.,我学了三年英语（现在不学了）。,3.I have written two letters
8、 this morning,今天上午我写了两封信，(说话时仍是上午)。,4.I wrote two letters this morning .,今天上午我写了两封信，（下午或晚上说的）。,注：表示不确定时间的状语，在句中无其它特定的过去时间状语时，或无表示过去动作的从句时常与现在完成时连用。,eg:1. I have not written to my parents recently.,我最近一直未给父母写信。,2. I have met him many times before.,我以前见过他多次。,现在完成进行时的主要用法,表示一个持续了一段时间，刚刚结束或仍在继续进行的动作。与现在
9、完成时有所有同的是现在完成进行时强调动作本身或动作的持续性、持久性。,eg：1. Weve been looking for you everywhere.where have you been?,我们一直在到处找你，你上哪儿去了？,2. What have you been doing?,你一直在做什么？,3. Ive been writing a laboratory report. 我一直在写实验报告。,PART B:EXERCISES,一.Find the choice : 1.When I was at school,I_to the library every day. A.go
10、B.was going C.have goneD.went 2.The new books_yet. A.havent arrived B.hast arrived C.didnt arrive D.dont arrive 3._you ever_to shanghai. A.Havent arrived B.Hasnt arrived C.Didnt arrived D.Havebeen,4.He_his lunch. A.had B.have had C.has had D.ate 5.For years,doctors_millions of patients lives with th
11、e help of microscopes. A.saved B.have saved C.has saved D.were saving,6.I was so happy to see John again last Sunday ,We _each other for more than two years. A.havent seen B.hadnt seen C.didnt see D.hasnt seen 7.We _three lessons this month. A.have learned B.learned C.has learned D.were having,8.I_t
12、o Paris several times. A.went B.have gone C.have been D.was going 9.Alice _ in china for ten years. A. has lived B.have lived C.lived D.has live,10.My uncle _in this city since 1980. A.lives B.have lived C.has lived D.lived 11.By now old Wang _in that factory for twenty years. A.have worked B.worked
13、 C.works D.has worked,12.Christianity(基督教) has become a worldwide religion(宗教) since it _almost two years ago. A. begin B.begins C.began D. has begin 13.Shakespeare _many plays such as Hamlet,and Romeo And Juliet. A.writes B.have written C.wrote D.has written,14.When we lived in phoenix we _ at Ariz
14、ona State university. A.studied B.have studied C.study D.were studying 15.I wrote to my parents three month ago but I_to my parents lately. A.havent written B.dont write C.didnt write D.will not write,16.Li Ming _to Shanghai.He will be back next month. A.went B.have gone C.has gone D.will go 17.She
15、_an actress for some time . A.was B.being C.is D.has been,18.Professor Chen _our exams yet. A.didnt mark B.hasntmarked C.will not mark D.havent marked 19.He left last year and_away ever since. A.is B.have been C.was D.has been 20. I_my task the other day. A.finished B.have finished C.finish D.will f
16、inish,二. choose the one that is wrong: 1.I lived in this city since I was a child . 2.I lost my pen, I have to write with a pencil . 3.Hangzhou is the most beautiful city I saw . 4.She has read the book last week .,C,5.My classmates and I have visited the memorial hall of chairman Mao yesterday . 6.My grandm
