苏教译林八下英语语法总复习资料及练习.doc
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1、精品文档牛津八下英语语法总复习一、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。例如: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 mont
2、h year.,today等)连用。例如: 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。例如:He has lived here since 1978.自从1978年以来,他一直住在这儿。(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
3、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到目前为止)等。例如: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 例如:He has been in the Leag
4、ue for three years.或It is three years since he joined the League. 他入团已三年了。3、延续性动词和终止性动词的概念英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。延续性动词 表示能够延续的动作,这种动作可以延续下去或产生持久影响。如:learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。终止性动词 也称非延续性动词、瞬间动词或短暂性动词,表示不能延续的动作,这种动作
5、发生后立即结束。如open, close, finish, begin, come, go, arrive, reach, get to, leave, move, borrow,buy等。4、延续性动词的用法特征1.延续性动词可以用于现在完成时,其完成时态可与表示段时间的状语连用。表示段时间的短语有:for two years, during the past three years, since last year, how long等。如:I have learned English since I came here.自从我来到这儿就学英语了。2.延续性动词不能与表示短暂时间的点时间状
6、语连用。如:It raind at eight yesterday morning.(误) rain为延续性动词,而at eight表示点时间,前后显然矛盾。如果用延续性动词表示一瞬间的动作,可以借助come, begin, get等终止性动词来表示。上句可改为:It began to rain at eight yesterday morning.(正)又如:-When did you get to know Jack?-Two years ago.-Then youve known each other for more than two years.-Thats right.5、终止性动
7、词的用法特征1.终止性动词可用来表示某一动作完成,因此可用于现在完成时。如:The train has arrived.火车到了。Have you joined the computer group? 你参加电脑小组了吗?2.终止性动词表示的动作极其短暂,不能持续。因此,不可与表示一段时间的状语连用(只限肯定式)。如:(1)他死了三年了。 误:He has died for three years.正:He has been dead for three years. 正:He died three years ago.正:It is three years since he died. 正:
8、Three years has passed since he died.(2)他来这儿五天了。 误:He has come here for five days.正:He has been here for five days. 正:He came here five days ago.正:It is five days since he came here. 正:Five days has passed since he came here. (1)、(2)句中的die、come为终止性动词,不能与表示段时间的状语连用。那么,应如何正确表达呢?可以采用下面的四种方法: (1)将句中终止性动
9、词转换为相应的延续性动词,如上面两例中的第一种正确表达方式。下面列举几例:leavebe away, borrowkeep, buyhave, begin/startbe on, diebe dead, move tolive in, finishbe over, joinbe in/be a member of, open sth.keep sth. open, fall illbe ill, get upbe up, catch a coldhave a cold。 (2)将句中表示段时间的状语改为表示过去确定时间的状语,如下面两例中的第二种正确表达方式。 (3)用句型It is+段时间+
10、since.表达原意,如上面两例中的第三种正确表达方式。 (4)用句型时间+has passed+since.表达原意,如上面两例中的第四种正确表达方式。3.终止性动词可用于现在完成时否认式中,成为可以延续的状态,因而可与表示一段时间的状语连用。如:He hasnt left here since 1986.I havent heard from my father for two weeks.4.终止性动词的否认式与until/till连用,构成not+终止性动词+until/till .的句型,意为直到才。如:You cant leave here until I arrive.直到我到了
11、,你才能离开这里。I will not go to bed until I finish drawing the picture tonight.今天晚上直到我画完画,我才上床睡觉。5.终止性动词可以用于when引导的时间状语从句中,但不可以用于while引导的时间状语从句中。when表示的时间是点时间(从句谓语动词用终止性动词),也可以是段时间(从句谓语动词用延续性动词)。而while表示的是一个较长的时间或过程,从句谓语动词用延续性动词。如:When we reached London, it was twelve oclock. (reach为终止性动词)Please look afte
12、r my daughter while/when we are away. (be away为延续性动词短语)6.终止性动词完成时不可与how long连用(只限于肯定式)。如:误:How long have you come here? 正:How long have you been here?正:When did you come here?二、现在完成时与一般过去时的区别1. 一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作。说话的侧重点只在于陈述一件过去的事情,不强调对现在产生的影响。如:He visited Guilin in 1998.他1998年参观过桂林。(只说
13、明去桂林的时间)2. 现在完成时表示动作发生在过去,对现在造成了影响或产生了结果。不与确定的过去时间状语连用。如:Jill has bought a new computer.吉尔买了一台新电脑。(着重点是现在有了一台新电脑)3. 两种时态的区分 (1)一般过去时的谓语动词用过去式,而现在完成时的谓语根本构成是助动词have /has +过去分词。如:The film started at 7 oclock. He has been a teacher for many years. (2)一般过去时通常与表示过去的时间状语连用。如:yesterday, last week, two year
14、s ago, just now, in 2002等;而现在完成时那么常与just, already, ever, never等副词和these days, this week, since., for.等表示一段时间的状语连用。看看以下的几组句子,有什么区别? Have you seen the film?(A) Did you see the film?(B) 说明 你看过这部电影吗?(A)句强调的是被问者对剧情是否了解;(B)句强调的是看这部电影的动作是否发生过,并不强调是否知道其内容。 How has he done it?(A) How did he do it?(B)说明他是怎么做的
15、这件事?(A)句强调的是他做这件事的方式对现在产生了某种影响;(B)句单纯的询问做这件事的方式。 He has lived in Beijing for 8 years.(A) He lived in Beijing for 8 years.(B)说明他在北京住了8年。(A)句讲的是到目前为止他在北京住了8年,可能还会继续在北京住下去。(B)句讲的是他在北京住过8年,现在不在北京了。三、现在完成时考点例析现在完成时是较难掌握、中考考查较多的时态。涉及的考点有:一、考查其构成助动词have (has) +动词过去分词构成现在完成时。如:1. Kates never seen Chinese fi
16、lms,_ ? A. hasnt she B. has she C. isnt she D. is she析:陈述句局部含否认词never,简略问句局部要用肯定式,又因Kates是Kate has的缩写,应选B。2. His uncle has already posted the photos to him. (改为否认句)His uncle _ posted the photos to him _. 析:already常用在肯定句中,yet常用在否认句、疑问句中,故填hasnt, yet。3. -Ann has gone to Shanghai. -So _her parents. A.
17、has B. had C. did D. have析:so+助/系/情态动词+主语结构中的动词形式应与前句结构中动词形式保持一致,又后句的主语为her parents是复数,应选D。二、考查其用法与标志词(一)当句中有never, ever, just, already, yet, before等时,常用现在完成时。如:1. -Mum, may I go out and play basketball? -_you_ your homework yet? A. Do; finish B. Are; finishing C. Did; finish D. Have; finished2. -_
18、you _anywhere before? -Yes, but I cant remember where I_A. Did; surf; surfed B. Have; surfed; surfed C. Did; surf; have surfed D. Have; surfed; have surfed析:据yet和before可知,应用现在完成时,故1题选D,2题选D。(二)当句中有for +段时间或since +点时间等时,主句常用现在完成时,谓语动词必须是延续性动词,假设是非延续性动词,要改为延续性动词或表状态的词(短语)。如:1. His brother has been to
19、Stone Forest twice_he came to Yunnan. A. after B. before C. since D. for析:主句用的是现在完成时,而从句用的是一般过去时,应选C。2. Tom_the CD player for two weeks.A. has lent B. has borrowed C. has bought D. has had析:A、B、C均为非延续性动词,在肯定句中不与表段时间的短语连用,应选D。3. I_a letter from him since he left. A. didnt receive B. havent got C. did
20、nt have D. havent heard析:据since可知,应排除A、C,hear from sb.=receive/get/have a letter from sb.意为收到某人的来信,应选B。三、考查have/has been (to, in)/have/has gone (to)的区别。如:1. -Have you ever_Lintong to see the Terra Cotta Warriors?-Yes, I have. A. went to B. gone to C. been in D. been to析:据句中的have,排除A,B项意为去某地了,C项意为一直呆
21、在某地,D项意为去过某地,符合题意,应选D。2. My parents _ Shangdong for ten years. A. have been in B. have been to C. have gone to D. have been析:此题句中有for+段时间结构,据此可排除C,B项意为去过某地,不合题意,D项缺介词,应选A。四、考查现在完成时与其他时态的联系和区别。如:1. Suns aunt has gone there for ten years.(改成正确的句子)析:非延续性动词与段时间连用时,除了把非延续性动词改成延续性动词外,还可把动词改为一般过去时或借助句型Its
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