大学英语四级重点语法精要

1、大学英语四级重点语法精要大学英语四级语法精要大学英语四级语法精要一、动词(时态，语态，用法，省略，一致性等) （一）时态 1、主动形式完成进行时。· 时间状语从句当中的时态：所有的过去一般现在时 表示现在和将来现在完成和将来完成3、现在完成进行时态 (have/has been + -ing 分词构成): 动作或状态从过去某时开始,继续到现在,可能继续下去,也可能刚刚结束. 1大学英语四级语法精要· Ive been writing letters for an hour. Ive been sittingin the garden.4、过去完成进行时(由had been

2、+ ing分词构成): 过去某个时刻以前一直在进行的动作· We had been waiting for her for two hours by the time she came.5、将来完成进行时: 将来某个时刻以前一直在进行的动作.· By next summer, he will have been working here for twenty years.6、将来完成时(由shall/will have + 过去分词构成): 将来某时会业已发生的事.· I shall have finished this one before lunch.They

3、ll have hit the years target by the end of October.（二）语态1、可以有两种被动结构的类型,例如:· He was said to be jealous of her success.It was said that he was jealous of her success.· 能同时适用于上述两个句型的主动词通常都是表示“估计”，“相信”等意义的动词，常见的有：assume,believe,expect,fear,feel,know,presume,report,say,suppose,understand等。·

4、; It is supposed that the ship has been sunk. The ship issupposed to have been sunk.2、担当be supposed to 与不定式的一般形式搭配时往往表示不同的意义。2大学英语四级语法精要· Why are you driving so fast in this area? You are supposedto know the speed to know the speed limit. (你应该晓得速度限制)3、双宾语及宾补结构的被动语态1）双宾语结构的被动语态: 双宾语结构变为被动语态时,可以把

5、主动结构中的一个宾语变为主语,另一个宾语仍然保留在谓语后面,但多数是把间接宾语变为主语。· He was asked a number of questions at the press conference.Two days were allowed them for making the necessary preparations.2） 宾补结构的被动语态:· She was called Big Sister by everybody.4、 短语动词1）Vi. + adv.：The plane took off two hours late.2）Vi. + prep

6、.：They looked round the Cathedral.3）Vi. + prep. (有被动语态)：Shes looking after her sisters children.4）Vi. + adv. + prep.：I began to look forward to their visits.5）Vt. + O + adv.：Some women choose to stay at home and bring up their children.The children were brought up by their mother.6） Vt. + adv. + O (

7、无被动语态)：I am trying to give up smoking. 3大学英语四级语法精要7）Vt. + O + prep.：We talked Donald into agreement.（三）省略1、在以as, than, when, if, unless等引导的从句中的省略: 在有些状语从句中,如果谓语包含有动词be,主语又和主句的主语一致a),或者主语是it b),就常常可以把从句中的主语和谓语的一部分(特别是动词be)省略掉.1）Look out for cars when crossing the street.When taken according to the di

8、rections, the drug has no sideeffects.If not well managed, irrigation can be harmful.Though reduced in numbers, they gained in fighting capacity. He said that no acrobat could ever perform those daring feats unless trained very young.Once having made a promise, you should keep it.2）If necessary Ill

9、have the letter duplicated.As scheduled, they met on January 20 at the Chinese Embassy.2、 在以than a) 或 as b) 引起的从句中,常会有一些成分省略.1）He told me not to use more material than (it is) necessary.We should think more of the collective than of ourselves.2）They worked with as much enthusiasm as young people (di

10、d).He is now a vice-manager, but still often works in the kitchen as before.Their training is free, as is all education.4大学英语四级语法精要We will, as always, stand on your side.3、错误的省略1）His life is as fully committed to books as anyone I know.2）While standing there in her nightgown, two bullets struck thew

11、all beside her.（四）一致1、主谓一致（与插入语无关）1）主谓的分隔原则：主谓之间可以用定语从句或者省略的定语从句分隔。2）定语从句中的主谓一致3）随前一致：n. + together with；as well as；including；along with；with / of；accompanied with / by4）就近原则5）如果主语表示的是同一个概念，同一人，同一事的时候，谓语动词用单数，这种结构的特征是and连接 的两个词只有一个冠词。· The iron and steel industry is very important to our countr

12、y. · The head master and mathematical teacher is coming.· The head master and the mathematical teacher are coming. · 类似的还有：law and order；bread and；butterblack and white；To love and to be loved is ；A lawyer and a teacher are；A lawyer and teacher is 6）随后原则：not A but B / not only A but a

13、lso B+v.(与B一致)7）百分比结构：most，half，rest，some，majority，one + persent；of+n1+v.（由n1决定）8）倒装结构的主谓一致：· There be +n 由名词决定动词· Among , between等介词位于句首引起倒装结构：Among / Between +系动词+n. （由名词决定动词）9）The + adj.的主谓一致：· 当表示“一类人”· 当表示某一抽象概念时。例：The good is always attractive. 5大学英语四级语法精要10） To do/doing/主从

14、+vs. 例：More than one + n.；many a +n.；a day or two2、如果主语是单数,尽管后面跟有with, together with, as well as,as much as, no less than, more than等引导的短语,谓语动词仍旧用单数形式.· Terry, along with her friend, goes skating every Saturday.An expert, together with some assistants, was sent to help in this work.The captain,

15、 as well as the coaches, was disappointed in the team.3、 代词作主语时一致1）each, either, neither和由some, any, no, every构成的复合代词,作单数看待.· Each of us has something to say. Is everybody ready?Somebody is using the phone.2） some, few, both, many 等作复数3） some 可后接复数,也可接单数,表示某一。none作复数看待时较多,但也有时作单数看待,主要看说话人脑中联系想到

16、的是复数还是单数概念, 但none 在代表不可数的东西时总是看作单数:· None of the books are easy enough for us. None of us seemto have thought of it.None (= nobody) has felt it more keenly than she did. None of this worries me.6大学英语四级语法精要4）all 和most 可后接复数,也可接不可数名词 (all of the, mostof the ), 动词用单数.4、由and 或 both and 连接名词词组时, 后用复

17、数; 由notonlybut (also), eitheror, neithernor或 or 连接的并列主语, 谓语通常和最邻近的主语一致.1）Not only the switches but also the old writing has beenchanged.My sister or my brother is likely to be at home.Neither my wife nor I myself am able to persuade my daughter to change her mind.2）如果一个句子是由there 或here引导, 而主语又不止一个, 谓

18、语通常也和最邻近的那个主语一致.· There was carved in the board a dragon and a phoenix.Here is a pen, a few envelopes and some paper for you.5、people, police, cattle, poultry (家禽), militia (民兵) 等通常都用作复数.1）Cattle are grazing on the pasture.The police are looking for him.2）有些集体名词有时作单数看待, 有时作复数看待, 主要根据意思来决定.·

19、; His family isnt very large.The committee meets twice a month.The audience was enormous.7大学英语四级语法精要The audience were greatly moved at the words.3）有些名词单复数同形, 可根据意思决定谓语动词的数:· This new series is beginning next month.These new series are beginning next month.This species is now extinct.These speci

20、es are now extinct.4、 表示时间, 重量, 长度, 价值等的名词, 尽管仍是复数形式, 如果作整体看待, 动词也可用单数形式 (当然用复数动词也是可以的):· Three weeks was allowed for making the necessary preparations.One hundred li was covered in a single night.6、其他问题1）书名, 国家名用单数:· Tales from Shakespeare is a book by Charles Lamb.2） 学科名, 如mathematics, e

21、conomics用单数.3） many a 或more than one 所修饰的词作主语时, 谓语动词多用单数形式:· Many a person has had that kind of experience.More than one person has involved in the case.4）a number of 后接复数, the number of后接单数:· A number of books have been published on the subject.The number of books published on the subject

22、 is simply amazing.5）one of those 后用单数. 在“one of + 复数名词 +关系分句”结 8大学英语四级语法精要构中，关系分句中谓语动词的单复数形式在一般情况下有两形式，一是根据先行词采用复数形式：· Joan is one of those people who go out of their way to behelpful.6）当one 之前与the only 等限定词和修饰语时，关系分句谓语动词根据one 而定，即采用单数形式：· He is the only one of those boys who is willing t

23、o take on another assignment.二、非谓语动词（一）不定式1、形式1） 完成式: 不定式的一般形式所表示的动作, 通常与主要谓语表示的动作(状态)同时(或几乎同时)发生, 或是在它之后发生. 假如不定式所表示的动作, 在谓语所表示的动作(状态)之前发生, 就要用不定式的完成式.9大学英语四级语法精要· I am glad to have seen your mother (= I am glad I have seenyour mother).(比较: I am glad to see you.)He is said to have written a ne

24、w book about workers.He pretended not to have seen me.2） 进行式: 如果主要谓语表示的动作(状态)发生时, 不定式表示的动作正在进行, 这时要用不定式的进行式.· You are not supposed to be working. You havent quiterecovered yet.We didnt expect you to be waiting for us here.He pretended to be listening attentively.3） 完成进行式: 在谓语所表示的时间之前一直进行的动作, 就要

25、用不定式的完成进行式.· The struggle was known to have been going for twenty years.We are happy to have been working with you.4） 被动式: 当不定式的逻辑上的主语是不定式所表示的动作的承受者时, 不定式一般要用被动形式.· It is an honor for me to be asked to speak here. She hatedto be flattered.He wanted the letter to be typed at once. This is b

26、ound to be found out.There are a lot of things to be done. She was too young to be assigned such work.10大学英语四级语法精要2、不定式的常考形式：1）一般形式：He decided to work harder in order to catch up with the others.被动形式: He preferred to be assigned some heavier work to do.语法功能：表示与谓语动词同步发生2）完成形式：He pretended not to have

27、 seen me.被动形式：The book is said to have been translated into many languages.语法功能：表示发生在谓语动词之前3、不定式常考的考点：1）不定式做定语-将要发生2）不定式做状语-目的3）不定式充当名词功能-To see is to believe.4、不定式的省略1）感官动词 see, watch, observe, notice, look at, hear, listento, smell, taste, feel + do 表示动作的完整性，真实性；+ doing 表示动作的连续性，进行性I saw him work

28、in the garden yesterday.昨天我看见他在花园里干活了。(强调"我看见了"这个事实)I saw him working in the garden yesterday.昨天我见他正在花园里干活。（强调动作）2）感官动词后面接形容词而不是副词：The cake tastes good; It feels comfortable.3）使役动词：have bid make let 等词后不定式要省略但同1)一样被动以后要还原toId like to have John do it. I have my package weighed.4）hel

29、p；help sb do；help sb to do；help do help to do5、有些动词后只跟不定式如：want，wish，hope，manage，promise，refuse，pretend，plan， offer，decide，agree，expect，allow sb. to do，cause sb. to do，permit sb. to do，enable sb. to do，force sb. to do，be more likely to do，love to do，warn sb. to do，be able to do，be ambitious to do，be

30、gin to do，start to do6、有的时候to后面要接-ing形式accustom (oneself) to，be accustomed to，face up to，in addition to，look forward to， object to， be reduced to， resign oneself to， be resigned to， resort to， sink to， be used to， be 11大学英语四级语法精要alternative to， be close/closeness to， be dedication/dedicated to， be o

31、pposition/opposed to， be similarity/similar to.7、功用: 不定式可以作主语 (a), 宾语 (b), 表语 (c), 定语 (d) 或是状语 (e).a. To scold her would not be just.b. We are planning to build a reservoir here.c. One of our main tasks now is to mechanize agriculture. d. Do you have anything to declare?e. We have come to learn from

32、 you.1）to 的不定式:· 在“动词+ 宾语+不定式”结构中, 如果动词是表示感觉意义的see,hear, watch, smell, feel, notice等, 或是表示“致使”意义的 have, make, let等, 其后的不定式结构不带to.John made her tell him everything.· 这类结构转换为被动语态时, 后面的不带to 的不定式一般还原为带to 的不定式.She was made to tell him everything.· 在 had better, had best, would rather, woul

33、d sooner, wouldjust as soon, might (just) as well, cannot but 等搭配之后, 动词不定式也不带to。如Id rather not have eggs and bacon for breakfast. They cannot but accept his term.· 在make do, make believe, let drop, let fall, let fly, letslip, let drive, let go of, let there be, hear say, hear tell, 12大学英语四级语法精要

34、leave go of等固定搭配中, 用不带to的动词不定式.John let fly a torrent of abuse at me.· 在动词help(或help +宾语)之后可用不带to的不定式, 也可用带to的不定式.Can I help (to) lift this heavy box?· 在介词except, but 之后, 如果其前有动词do的某种形式, 不定式一般不带to, 反之带to.There is nothing to do except wait till it stops raining. Smith will do anything but w

35、ork on a farm.Theres no choice but to wait till it stops raining.· 连词 rather than, sooner than 置于句首时, 其后的不定式不带to.Rather than push the book back as he wanted to do, he forced himself to pick it up.· 出现在句中其他位置时, 其后的不定式有时带to, 有时不带to.He decided to write rather than telephone.The manager believ

36、es it is important to invest in new machinery rather than to increase wages.· 用作补语的动词不定式, 如果主语是由“all + 关系分句”，“thing+关系分句”，“what分句”或“thing +不定式结构”等构成，并带有do的某种形式，这时，作为主语补语的不定式可以省to，也可以不省.What he will do is (to) spoil the whole thing.13大学英语四级语法精要The only thing I can do now is go on by myself.The t

37、hing to do now is clear up this mess.2） 不定式的其他用法· tooto 结构通常表示否定意义:She was too young to understand all that.· enoughto结构则表示肯定意义:She was not old enough to understand all that.· not too, but too, all too, only too等和不定式连用时,不定式一般不表示否定意义:Hes only too pleased to help her.· soas (to)这种结

38、构也可用不定式作状语:Be so kind as to drop in some time when you are free.3） 如果要说明不定是表示的动作是谁做的, 可以在不定式前加一个for引起的短语:· It is not hard for one to do a bit of good.It is a great honor for us to be present at this rally.4）在以某些形容词(如 kind, good, nice, wise, unwise, clever,silly, wrong, right, foolish, stupid, c

39、areless, considerate, rude, naughty, impolite等)作表语时, 不定式前可加一个of引起的短语, 来说明不定式指的是谁的情况:· Its kind of you to think so much of us.Its very nice of you to be so considerate.Its unwise of them to turn down the proposal.14大学英语四级语法精要（二）need/want 后的-ing形式具有被动的意思。其中，want不太常用。如：He needs (a lot of) encourag

40、ing.（三）动名词：具有动作性特征的名词（是名词：seeing is believing；具有动词性特征可以带宾语 starving troops isnecessary）1、动名词的形式:一般形式：I dont like you smoking.完成形式：I regret not having taken your advice.被动形式：This question is far from being settled.2、动名词常考的点1）动名词做主语谓语动词为单数2）在动名词和不定式中,做为介词的宾语是动名词3）动名词的否定直接在其前加否定词,通过代词的宾格或所有格形式给出逻辑主语.I

41、would appreciate_ back this afternoonAyou to call Byou call Cyou calling Dyoure calling（Key：C your calling 也对）I regret not having taken your advice.4）有些词后只能接动名词admit，appreciate，avoid，celebrate，consider，contemplate，defer，delay，deny，detest， discontinue，dislike，dispute，enjoy，it entails，escape，excuse，ex

42、plain，fancy，feel like， finish，forgive，cant help，hinder，imagine，it involves，keep，it means，mention，mind， miss，it necessitates，pardon，postpone，practice，prevent，recall，report，resent，resist， risk，suggest，understand.另还有一些接-ing形式的常用说法：its no good，its no/little/hardly any/ use，its not/hardly/scarcely use，it

43、s worthwhile，spend money/time，theres no，theres no point in，theres nothing worse than，whats the use/point.5）有些词后加不定式和动名词均可· remember, forget, try, stop, go on, cease, mean后面用不定式和-ing形式，意义截然不容。I remembered to post the letters. (指未来/过去未来的动作) I remembered posting/having posting the letters (我记得这个动作

44、)· forgot与remember的用法类似。15大学英语四级语法精要I regret to inform you that 我很遗憾地通知你I regretted having left the firm after twenty years. 为了"二十年前的离开"而遗憾。· try to 努力 You really must try to overcome your shyness. · try ing 试验 Try practicing five hours a day.I mean to go, but my fat

45、her would not allow me to. 打算、想我想去，但我父亲不让我去。To raise wage means increasing purchasing power. 意味着赠加工资意味着增加购买力。· prefer的用法：I prefer to wait here. （所以啊，你不介意的话，我就等下去。）I prefer waiting here.（我正在这里等，我就喜欢这么做。） I prefer swimming to cycling. （这个句子里面就不能用不定式了。）3、分词：现在分词主动进行,过去分词被动状态1）现在分词的形式:· 一般式: D

46、o you see the man talking to the dean（主任）? (与谓语动词同步发生)· 完成形式：Not having made adequate preparations, they failed. (发生谓语动词之前)· 完成被动形式：Having been adapted, the script seems perfect. (发生谓语动词之前且表示被动)2）过去分词· 过去分词表示被动：Fight no battle unprepared.· 过去分词的进行形式：Youll find the topic being dis

47、cussed everywhere. (强调正在被做)· 这三种非谓语动词，都可以构成复合结构，非谓语动词所修饰的成分是这些非谓语动词的逻辑主语。他们之间的一致关系主动还是被动，往往就是考点。独立主格结构中，要注意的是分词与他前面的逻辑主语之间的主动被动的关系。（四）V+ing形式(现在分词及动名词)1、形式1）完成式: 如果要表示动名词代表的动作在谓语所表示的动作之前发生, 通常用动名词的完成形式.· He didnt mention having met me.16大学英语四级语法精要I regret not having taken her advice.·

48、 在某些动词后(或成语中), 常用动名词的一般形式, 尽管动作是在谓语所表示的动作之前发生的.Excuse me for coming late.I dont remember ever seeing him anywhere.· 现在分词的完成式主要用在状语中, 表示这动作在谓语所表示的动作之前发生.Having been there many times, he offered to be our guide. Having found the cause, they were able to propose a remedy. · 另外, 独立结构也可用现在分词的完成

49、形式.The guests having left, they resumed their discussion.The children, having eating their fill, were allowed to leave the table.2） 被动式: 当一个动名词逻辑上的主语所表示的是这动作的对象时, 动名词一般要用被动形式.· His being neglected by the host added to his uneasiness.He couldnt bear being made fun of like that.· 但要注意, 在want

50、, need, deserve, require 等动词后, 尽管表示的是被动的意思, 却用动名词的主动形式.My pen needs filling. The point deserves mentioning.· 在worth这个形容词后情形也是这样.Her method is worth trying.17大学英语四级语法精要· 现在分词的被动式可以用来作定语, 宾语补足语, 状语及用于独立结构中.This is one of the experiments being carried on in our laboratory.Being asked to give

51、a performance, she couldnt very well refuse.These are sold at reduced prices, the defects always being pointed out to the customers.3）完成被动式: 如果表示的动作在谓语表示的动作之前发生, 有时需要用动名词的完成被动式.I dont remember having ever been given a chance to try this method.· 但在多数情况下都避免使用这一形式, 而用一般被动形式代替, 以免句子显得累赘.· 现在分

52、词的完成被动式一般用来作状语或用于独立结构中.Having been given such a good chance, how could she let it slip away?The decision having been made, the next problem was how to make a good plan.All the compositions having been written and collected, the teacher sent the students home.2、 句法功用1）作主语:Walking is good exercise. It

53、s nice talking to you. 18大学英语四级语法精要2）作宾语:Your shoes need polishing. You mustnt delay sending the tractors over.3）作介词宾语: 动名词作介词宾语用的时候最多. 它常可以用在某些成语后面, 常见的有: insist on, persist in, thinkof, dream of, object to, suspectof, accuseof,chargewith, hear of, approve of, preventfrom,keepfrom, stopfrom, refrai

54、n from, be engagedin, look forward to, opposed to, depend on,thankfor, feel like, excusefor, aim at,devoteto, set about, spendin, get (be) usedto, be fond of, be capable of, be afraid of, betired of, be sick of, succeed in, be interestedin, feel (be) ashamed of, be proud of, be keenon, be responsibl

55、e for.4）作表语: The real problem is getting to know the needs of the people.· 动名词和不定式都可以作主语或表语. 一般说来, 在表示抽象的一般的行为时多用动名词; 在表示具体某词动作, 特别是将来的动作时, 多用不定式.5）作宾语补足语: 分词可以在see, hear, notice, watch, feel, find,keep, get, have等动词后作宾语补足语. The words immediately set us all laughing. Once we caught him dozing o

56、ff in class. 19大学英语四级语法精要· 在see, hear, feel, watch, notice等动词后, 及可用现在分词,也可用不定式构成宾语补足语. 用现在分词时, 表示动作正在发生, 用不定式时表示动作发生了.Do you hear someone knocking at the door? Yes, I did. I heard him knock three times.6）作状语: 现在分词作状语时, 通常都表示主语正在进行的另一动作,来对谓语表示的主要动作加以修饰或作为陪衬.I ran outof the house shouting. I got

57、home, feeling verytired.· 现在分词短语有时可以用作状语表示原因, 相当于一个表示原因的状语从句.Not knowing her address, we couldnt get in touch with her. Seeing nobody at home, she decided to leave them a note.Having already seen the film twice, she didnt want to go to the cinema.· 现在分词短语有时可用作时间状语, 相当于when引起的从句:Seeing thos

58、e pictures, he couldnt help thinking of those memorable days they spent together.· 如果两个动作是完全同时发生的, 多用when 或while加分词这种结构.Be careful when crossing the street.When leaving the airport, they waved again and again to us. She got to know them while attending a conference in Beijing. 20大学英语四级语法精要7） 前面

59、带有代词或名词的动名词结构: 一个动名词前面可以加一个物主代词(或名词的所有格结构), 来表示这个动名词逻辑上的主语.· Their coming to help was a great encouragement to us.Do you mind my reading your paper?They insisted on my staying there for supper.· 如果不是在句子开头, 这个结构常常可以用名词的普通格(或人称代词宾格), 这比用所有格更自然.I dont mind him going.She hates people losing their temper.8） 只能用动名词作宾语的动词: suggest, finish, avoid, s