大学英语三级语法大全

大学英语三级语法大全

名词性从句

在句子中起名词作用的句子叫名词从句 (Noun Clauses)。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。 引导名词性从句的连接词

引导名词性从句的连接词可分为三类：

连接词：that, whether, if（不充当从句的任何成分）

连接代词：what, whatever, who, whoever, whom, whose, which. 连接副词：when, where, how, why 不可省略的连词： 1. 介词后的连词

2. 引导主语从句和同位语从句的连词不可省略。 That she was chosen made us very happy.

We heard the news that our team had won.

比较：whether与if 均为"是否"的意思。 但在下列情况下，whether 不能被if 取代： 1. whether引导主语从句并在句首 2. 引导表语从句

3. whether从句作介词宾语 4. 从句后有"or not"

Whether he will come is not clear.

大部分连接词引导的主语从句都可以臵于句末，用 it充当形式主语。 It is not important who will go.

It is still unknown which team will win the match. 名词性wh-从句

1）由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如：

主语： How the book will sell depends on its author. 书销售如何取决于作者本人。 直接宾语：In one's own home one can do what one likes. 在自己家里可以随心所欲。 间接宾语：The club will give whoever wins a prize. 俱乐部将给得胜者设奖。 表语： My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。

宾语补足语：She will name him whatever she wants to. 她高兴给他起什么名字就取什么名字。

同位语： I have no idea when he will return. 我不知道他什么时候回来。

形容词宾语：I'm not sure why she refused their invitation. 我尚不能肯定她为什么拒绝他们的邀请。

介词宾语： That depends on where we shall go. 那取决于我们去哪儿。

2）Wh-从句作主语也常用先行词it做形式主语，而将wh-从句臵于句末，例如： It is not yet decided who will do that job. 还没决定谁做这项工作。 It remains unknown when they are going to get married. 他们何时结婚依然不明。

名词性that-从句

1）由从属连词that引导的从句叫做名词性that-从句。 that只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主语、宾语、表语、同位语和形容词宾语，例如： 主语：That he is still alive is sheer luck.

他还活着全靠运气。

宾语：John said that he was leaving for London on Wednesday.

约翰说他星期三要到伦敦去。 表语：The fact is that he has not been seen recently.

事实是近来谁也没有见过他。

同位语：The fact that he has not been seen recently disturbs everyone in his office. 近来谁也没有见过他，这一事实令办公室所有的人不安。 形容词宾语：I am glad that you are satisfied with your job.

你对工作满意我感到很高兴。

2）That-从句作主语通常用it作先行词，而将that-从句臵于句末，例如： It is quite clear that the whole project is doomed to failure.

很清楚，整个计划注定要失败。

It's a pity that you should have to leave.

你非走不可真是件憾事。

用it作形式主语的that-从句有以下四种不同的搭配关系：

a. It + be +形容词+ that-从句

It is necessary that… 有必要…… It is important that… 重要的是…… It is obvious that… 很明显……

b. It + be + -ed 分词+ that-从句 It is believed that… 人们相信…… It is known to all that… 从所周知…… It has been decided that… 已决定…… c. It + be +名词+ that-从句

It is common knowledge that… ……是常识 It is a surprise that… 令人惊奇的是…… It is a fact that… 事实是…… d. It +不及物动词+ that-分句 It appears that… 似乎…… It happens that… 碰巧……

It occurred to me that… 我突然想起……

否定转移

1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。 I don't think I know you. 我想我并不认识你。 I don' t believe he will come. 我相信他不回来。

注意：若谓语动词为hope,宾语从句中的否定词不能转移。

I hope you weren't ill. 我想你没有生病吧。

2) 将seem, appear 等后的从句的否定转移到前面。 It doesn't seem that they know where to go. 看来他们不知道往哪去。

It doesn't appear that we'll have a sunny day tomorrow.

看来我们明天不会碰上好天气。

定语从句

定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。

关系代词有：who, whom, whose, that, which等。 关系副词有：when, where, why等。

关系代词引导的定语从句

关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。 1）who, whom, that

这些词代替的先行词是人的名词或代词，在从句中所起作用如下： Is he the man who/that wants to see you?

他就是你想见的人吗？（who/that在从句中作主语）

He is the man whom/ that I saw yesterday. 他就是我昨天见的那个人。（whom/that在从句中作宾语）

2) Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换), 例如： They rushed over to help the man whose car had broken down. 那人车坏了，大家都

跑过去帮忙。

Please pass me the book whose (of which) cover is green.请递给我那本绿皮的书。 3)which, that

它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，例如：

A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（which / that在句中作宾语）

The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作宾语)

关系副词引导的定语从句

关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。 1）when, where, why

关系副词when, where, why的含义相当于"介词+ which"结构，因此常常和"介词+ which"结构交替使用，例如：

There are occasions when (on which) one must yield. 任何人都有不得不屈服的时候。

Beijing is the place where (in which) I was born. 北京是我的出生地。

Is this the reason why (for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗？

2）that代替关系副词

that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和"介词+ which"引导的定语从句，在口语中that常被省略，例如：

His father died the year (that / when / in which) he was born. 他父亲在他出生那年逝世了。

He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十年前居住过的地方。

判断关系代词与关系副词

方法一： 用关系代词，还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语，就必须要求用关系代词；而不及物动词则要求用关系副词。例如： This is the mountain village where I stayed last year. I'll never forget the days when I worked together with you. 判断改错

（错） This is the mountain village where I visited last year. （对） This is the mountain village (which) I visited last year.

（错） I will never forget the days when I spent in the countryside. （对） I'll never forget the days (which) I spent in the countryside.

习惯上总把表地点或时间的名词与关系副词 where, when联系在一起。此两题错在关系词的误用上。

方法二： 准确判断先行词在定语从句中的成分(主、谓、宾、定、状)，也能正确选择出关系代词/关系副词。

例1. Is this museum ___ you visited a few days age? A. where B. that C. on which D. the one

例2. Is this the museum ____ the exhibition was held. A. where B. that C. on which D. the one 答案：例1 D，例2 A

例1变为肯定句： This museum is ___ you visited a few days ago. 例2变为肯定句： This is the museum ___ the exhibition was held. 在句1中，所缺部分为宾语，而where, that, on which都不能起到宾语的作用，只有the one既做了主句的表语，又可做从句的宾语，可以省略关系代词，所以应选D。

而句2中, 主、谓、宾俱全，从句部分为句子的状语表地点，既可用副词where，又因 in the museum词组，可用介词in + which 引导地点状语。而此题中，介词on 用的不对，所以选A。

关系词的选择依据在从句中所做的成分，先行词在从句中做主、定、宾语时，选择关系代词 (who, whom, that, which, whose)； 先行词在从句中做状语时，应选择关系副词 ( where 地点状语，when 时间状语，why 原因状语) 。

限制性和非限制性定语从句

1) 定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，例如：

This is the house which we bought last month. 这是我们上个月买的那幢房子。（限制性）

The house, which we bought last month, is very nice.这幢房子很漂亮，是我们上个月买的。（非限制性）

2) 当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：

Charles Smith, who was my former teacher, retired last year. 查理〃史密斯去年退休了，他曾经是我的老师。

My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园。

This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。

3) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：

He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。

Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。

说明：关系代词that和关系副词why不能引导非限制性定语从句。

as, which 非限定性定语从句

由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。

As we know, smoking is harmful to one's health.

The sun heats the earth, which is very important to us. 典型例题

1）Alice received an invitation from her boss, ___came as a surprise.

A. it B. that C. which D. he

答案C. 此为非限定性从句，不能用 that修饰，而用which.，it 和he 都使后句成为句子，两个独立的句子不能单以逗号连接。况且选he句意不通。

2）The weather turned out to be very good, ___ was more than we could expect. A. what B. which C. that D. it

答案B。which可代替句子，用于非限定性定语从句，而what不可。That 不能用于非限定性定语从句，it不为连词，使由逗号连接的两个句子并在一起在英语语法上行不通。 3）It rained hard yesterday, ____ prevented me from going to the park.. A. that B. which C. as D. it

答案B.

as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：

(1) as 引导的定语从句可臵于句首，而which不可。

(2) as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用which.。

在本题中，prevent由于是行为动词，所以正确选项应为B。

As 的用法

例1. the same… as；such…as 中的as 是一种固定结构, 和……一样……。

I have got into the same trouble as he (has). 例2. as可引导非限制性从句，常带有'正如'。 As we know, smoking is harmful to one's health. As is known, smoking is harmful to one's health.

As是关系代词。例1中的as作know的宾语；例2中，它充当从句的主语，谓语动词know要用被动式。

介词+关系词

1）介词后面的关系词不能省略。 2）that前不能有介词。

3）某些在从句中充当时间，地点或原因状语的"介词+关系词"结构可以同关系副词 when 和where 互换。

This is the house in which I lived two years ago. This is the house where I lived two years ago.

Do you remember the day on which you joined our club? Do you remember the day when you joined our club?

先行词和关系词二合一

1)Whoever spits in public will be punished here. (Whoever 可以用 anyone who 代替)

2)The parents will use what they have to send their son to technical school. (what 可以用all that代替)

what/whatever; that/what; who/whoever 1）what = the thing which；whatever = anything What you want has been sent here.

Whatever you want makes no difference to me. 2) who= the person that; whoever= anyone who （错）Who breaks the law will be punished. （对）Whoever breaks the law will be punished.

（错）Whoever robbed the bank is not clear.

（对）Who robbed the bank is not clear.

3) that 和 what 当that引导定语从句时 ，通常用作关系代词，而引导名词性从句时，是个不充当任何成分的连接词。宾语从句和表语从句中的that常可省略。What只能引导名词性从句， 用作连接代词，作从句的具体成分，且不能省略。 I think (that) you will like the stamps. What we need is more practice.

特殊词精讲

stop doing/to do

stop to do 停止，中断做某事后去做另一件事。 stop doing 停止做某事。

They stop to smoke a cigarette.他们停下来，抽了根烟。

I must stop smoking. 我必须戒烟了。

典型例题

She reached the top of the hill and stopped ___ on a big rock by the side of the path. A. to have rested B. resting C. to rest D. rest

答案：C。由题意可知，她到了山顶，停下来在一个路边的大石头上休息。因此，应选

择"stop to do sth. 停下来去做另一件事"。而不仅仅是爬山动作的终止，所以stop doing sth.不正确。

forget doing/to do

forget to do 忘记要去做某事。 (未做) forget doing 忘记做过某事。 (已做)

The light in the office is stil on. He forgot to turn it off. 办公室的灯还在亮着，它忘记关了。(没有做关灯的动作) He forgot turning the light off.

他忘记他已经关了灯了。 ( 已做过关灯的动作) Don't forget to come tomorrow.

别忘了明天来。 (to come动作未做) 典型例题 ---- The light in the office is still on.

---- Oh，I forgot___.

A. turning it off B. turn it off C. to turn it off D. having turned it off

答案：C。由the light is still on 可知灯亮着，即关灯的动作没有发生，因此用forget to do sth. 而forget doing sth表示灯已经关上了，而自己忘记了这一事实。此处不符合题意。

结果状语从句

结果状语从句常由so…that 或 such…that引导。so…that与such…that之间可以转换。例如：

让步状语从句

1）though， although引导的让步状语从句，后面的从句不能有but，但是 though 和yet可连用。例如：

条件状语从句

连接词主要有 if， unless， as/so long as， on condition that 等。if 引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。

目的状语从句

表示目的状语的从句可以由that， so that， in order that， lest， for fear that， in case等词引导。例如：

方式状语从句

方式状语从句通常由as， （just） as…so…， as if， as though引导。

原因状语从句

比较because， since， as和for：

地点状语从句

地点状语从句通常由where， wherever 引导。例如：

虚拟语气：真实条件句

非真实条件句

虚拟语气可以表示过去，现在和将来的情况，时态的基本特点是时态往后推移。

混合条件句

有时，主句与从句的动作发生在不同的时间，主句从句谓语动词的虚拟语气形式因时间不同而不同，这种条件句叫做混合条件句。例如：

虚拟条件句的倒装

虚拟条件句的从句部分含有were， should， 或had时， 可省略if，再把were， should或had 移到从句的句首，实行倒装。例如：

wish的用法

1）wish后面的从句，表示与事实相反的情况，或表示将来不太可能实现的愿望。其宾语从

特殊的虚拟语气词should

It is（high）time that It is （high） time that 后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。例如：

比较if only与only if

only if表示"只有"；if only则表示"如果……就好了".If only也可用于陈述语气。例如： need不必做和本不必做

didn't need to do表示过去不必做某事， 事实上也没做。

needn't have done表示过去不必做某事， 但事实上做了。例如：

主谓一致：

主谓一致中的靠近原则

并列结构作主语时谓语用复数

谓语需用单数

谓语动词与前面的主语一致

指代意义决定谓语的单复数

与后接名词或代词保持一致

1 a host of 大量 2 a test for检测目的 3 a test on对……进行测试 4 a test with检测手段 5 above all 最重要的; 6 according to根据

7 achieve equilibrium取得平衡 8

9 achieve success 获得成功 10 achieve victory获得胜利 11 act on 遵照┄行动，作用于; 12 act on对…有影响 13 add up to 总计，合计 14 add… to 把…加到…. 15 adhere to 坚持，奉行; 16 after all 毕竟，均不合题意; 17 agree on对……取得一致意见 18 agree to同意

19 agree with sb.同意某人的话 20 along with 和┄一道,和┄一起; 21 alternate (with)交替; 22 amount to 合计,共计; 23 an equal to与……24 and yet然而

25 anything but 一点也不; 26 anything like像……那样的东西 27 anywhere near接近于 28 apart form除……之外尚有 29 apply to 向……申请，适用于 30 appreciation of对……的欣赏/赞赏 31 argue against 反对

32 as a result of作为……的结果，由于 33 as a result(作为结果，因此)表结果，34 as a whole 作为一个整体，整个看来 35 as far as …/are concerned就……而言 36 as for至于，就…方面说

而定;

)相同的人

达到目的

37 as if好像，仿佛 38 as soon as一~就~ 39 as though好像，仿佛 40 as to 至于，关于;

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