外研社版高一英语必修一第四单元课件.ppt

Module 4 grammar:present perfect tense,外研版第一册,Study the following sentences:,Who has opened the door?My watch has stoppedThey havent completed that experiment yet.He has already returned that book.,(An action completed in the past but connected with the present situation.),5.I have studied English for three years/since1999.6.He has worked in the company since he came to the city.7.So far he has written five books.8.It has been years since I came here.,(An action beginning in the past and still continuing),Form:have/has done,Usage:,1.An action completed in the past but connected with the present situation.,2.An action beginning in the past and still continuing,1.-How long ago did you part from each other?-It _ five years since we said goodbye to each other.A.was B.would be C.had been D.has been-Who broke the glass?-Sorry.I_.have done B.did C.broke D.am,3.-How long has he been away,do you know?-Sorry,I cant tell exactly when he _,though I know he has already been away.A.was leaving B.has left C.would leave D.left,4.-How long _ at this job?-Since 1990.A.were you employed B.have you been employed C.had you been employed D.will you be employed,-How are you feeling today?-Oh,I _ as ill as I do now for a week.A.didnt feel B.wasnt feeling C.dont feel D.havent felt,Find the mistakes in the following sentences and correct them:1.He has come back for three weeks.2.I have joined the army for ten years.,(He came back three weeks ago.He has been back for three weeks.),(I have been in the army for ten years.I joined the army ten years ago.,3.We achieved great success in the past few years.4.Perhaps she made several friends by now.5.When have you bought this computer?,We have achieved great success in the past few years.,Perhaps she has made several friends by now.,When did you buy this computer?,Sum up:The following words and phrases often appear in the present perfect tense.,already,just,yet,lately,recently,ever,rarely,since,so far,up to now,by now,in the past ten years,during the past ten years,in the last few months,during the last few months,1.现在完成时用来表示现在之前已发生或完成的动作或状态,但其结果却和现在有联系,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 laid the table.,(含义是:已可以吃饭了.),Michael has been ill.,(含义是:现在仍然很虚弱),2.现在完成时可以用来表示发生在过去某一时刻的,持续到现在的情况,常与for,since连用.,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,lately等:,He has already obtained a scholarship.,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 Bunny say anything against her.,I have used this pen only three times.It is still good.,6.现在完成时表示现在之前业已完成的动作,虽然其效果或影响仍然存在但已不再继续,但是有一些现在完成时的句子,在后面加上for+一段时间,则现在完成时的动作就表示延续性.,Thomas has studied Russian.,(现在不再学俄语),Thomas has studied Russian for three years.,(=Thomas began to study Russian three ago,and is still studying it now).,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,up to these few days/weeks/months/years,this morning/week/month/year,now,just,today,up to present,so far等:,Peter has written six papers so far.,7.现在完成时还可以用来表示过去的一 个时间到现在这段时间内重复发生的动作.,We have had four texts this semester.,现在完成时的“完成用法”和“未完成用法,1.现在完成时的完成用法,现在完成时的“完成用法”指的是动作发生在过去某一时刻并已结束，但该动作对现在产生了影响，与现在情况具有因果关系。,Pay attention to the following words:,1.fascinating:extremely interesting and charming2.Rewarding:worth doing or having,giving satisfaction but perhaps not money3.starving:very hungry,He has turned off the light,他已把灯关了。,(动作结束于过去，但说明的是现在的情况-灯现在不亮了。),现在完成时“完成用法”的特点是动作不延续，因此，该时态只能与表示不定的过去时间状语(如：already，yet，before，recently等)、频度时间状语(如：never，ever，once等)、包括现在时刻在内的时间状语(如：this morning month year.，today等)连用。,Have you found your pen yet？你已找到你的钢笔了吗？,2.现在完成时的未完成用法,现在完成时的“未完成用法”指的是动作开始于过去某一时刻，一直延续到现在，或可能还要继续下去。,He has lived here since 1978.,从1978年以来，他一直住在这儿。,Man has now learned to release energy from the nucleus of the atom.,There has been too much rain in San Francisco this year.,The friendly relations and cooperation between our two countries have been enhanced in the past few years.,Up to the present everything has been successful.,Cf:Tense:the past indefinite tenseUsage:a definite action completed in the past,(动作起始于1978年，一直住到现在，可能还要继续住下去。),I have been in the army for more than 5 years.,我在部队已经呆了五年多了。,(动作开始于5年前，一直延续至今，有可能还要继续下去。),此种用法的句中常需一个表示一段时间的状语(由since或for引导)，或表示与现在时刻相连的时间状语(如：up to now，so far)等。,I have heard nothing from him up to now.,到目前为止我没有他的任何消息。,注意：(1)现在完成时的未完成用法只适用于延续性动词，不可用于终止性动词，即瞬间完成或延续时间很短的动词。如：come，go，arrive，leave，join，become，die等。,(2)现在完成时常见两种句型：,主语have/has beenfor短语,It is一段时间 since从句,He has been in the League for three years.或It is three years since he joined the League.,练习题1.Jack _ over five lessons by seven oclock.Then he _ a rest.went;took B.went;had taken C.had gone;took D.had gone;had taken,c,.2.We _ out by that time that he _ spy for a long time.had found;had been B.had found;was C.found;had been D.found;was 3.Before the news _ him,he _ to know about it.reaches;has got B.reached;had got C.reached;got D.had reached;got4.I _ him a second letter before I _ from him.wrote;heard B.wrote;had heard C.had written;heard D.have written;hear,A,B,C,5.People _ that the soldiers _ fighting A.say;had stopped B.said;has stopped C.say;stopped D.said;had stopped 6 They _ for five hours when they _ in New York.A.flew;arrived B.had flown;had arrived C.flew;had arrived D.had flown;arrived 7.She _ that it _ for two days by that day.A.says;has rained B.says;had rained C.said;had rained D.said;rained,D,D,C,8.John _ there since the year before,so he _ them.A.had worked;knew B.had worked;had known C.worked;knew D.worked;had known 9.He _ angry because he _ for a long time.A.had got;had waited B.got;waited C.had got;waited D.got;had waited,A,D,Thankyou,Verbs to describe events that can continue over a period of time:Know,live,stay,remain,2.Verbs to describe events that happen at a particular point of time:borrow,buy,give,leave,open,Important phrases:,1.put up 2.so far 3.up to now 4.till now5.get away from 6.a great many7.a number of 8.go up,Everyday English:,1.Am I right in thinking 2.A great many things 3.To do well 4.Congratulations5.Its fascinating!6.To make it(1,400),Homework:1.Look up the following words in your dictionary and pay attention to their use afford,dress,contact,2.Write a passage to describe your village town or city,Important sentence patterns:,1.Its been six years since we last saw each other.2.This is the first time Ive visited your hometown.3.I feel very fortunate living here.Whats the climate like?5.The rent for an apartment is very high.,Similar words:(Look them up in your dictionary),1.promising 2.inviting 3.providing 4.demanding 5.engaging,Words that easily get confused:,Employ employeeEmployment employerunemployed,一座五层高的办公楼,1.a five-story office building2.a five-storey office building3.a five-storied office building4.a five-storeyed office building5.The office building is five storeys/stories high.,Important words:,1.sound:听起来 This piece of music sounds beautiful.2.Look：看上去 She looks younger than she actually is.,3.smell：闻起来 The mixture smells terrible.4.taste：尝起来 The food tastes delicious.5.Feel：摸起来 Silk feels smooth.,Sum up:The above words have something in common,1.They cant be used in the passive voice.,2.They cant be used in the continuous tense.,3.They are usually followed by adj.,