求英语中先行词的用法 越详细越好哈！

求详解这道英语题（越详细越好！）~

这是一个高考题，which 是不可以的，引导非限制性定语从句，在从句中作宾语.
what 只能引导名词性从句这里不通。
one为代词，替代“The Best Travelling City in China”
所以应选B.


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。

18.1 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）

18.2 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。

18.3 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（注：先显示题，再显示答案，横线；用不同的颜色表示出。）
（错） This is the mountain village where I visited last year.
（错） I will never forget the days when I spent in the countryside.
（对） This is the mountain village (which) I visited last year.
（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) 。

18.4 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。

18.5 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?

18.6 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 引导的定语从句可置于句首，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 know, 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。

18.7 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)

18.8 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.
（错）Whoever robbed the bank is not clear.
（对）Whoever breaks the law will be punished.
（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.

18.9 关系代词that 的用法
1）不用that的情况
a) 在引导非限定性定语从句时。
(错) The tree, that is four hundred years old, is very famous here.
b) 介词后不能用。
We depend on the land from which we get our food.
We depend on the land that/which we get our food from.
2) 只能用that作为定语从句的关系代词的情况
a) 在there be 句型中，只用that，不用which。
b) 在不定代词，如：anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which。
c) 先行词有the only, the very修饰时，只用that。
d) 先行词为序数词、数词、形容词最高级时，只用that。.
e) 先行词既有人，又有物时。
举例：
All that is needed is a supply of oil.
所需的只是供油问题。
Finally, the thief handed everything that he had stolen to the police.
那贼最终把偷的全部东西交给了警察

定语从句中，一般的从句关系代词是which、who、whom、that、 whose, 其代替主句中的人或物，在从句中做主语、宾语或定语。而学生在学习过程中，常会遇到as作为关系代词出现，做起题来，无从下手,就此笔者对as作为关系代词引导定语从句的情况做一归纳, 以供参考.

一、as引导限制性定语从句

主要结构有：

the same…as

as…as

such…as

so…as

主句中出现the same, as, such, so修饰先行词，需选择as做关系代词在定语从句中做主语或宾语。

1. It’s the same person as we wanted to find yesterday .

我们昨天要找的是同一个人。

2. Such girls as he knows are good at English .

他所认识的女孩都擅长英语。

3. Do you have such books as we like ?

你有我们喜欢那种书吗？

4. She will marry as healthy a man as she can find .

她将嫁给她能找到的任何一个有钱人。

5. There is so warm a house as we want to live in .

这里有如此暖和的房子，我们都想住在里面。

6. He has so difficult a problem , as none of us can solve .

他有如此难的一个问题，我们没有人能解决。

二、引导非限制性定语从句

⑴ as引导非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾

1． As everyone knows ,China is a beautiful country with a long history .

每个人都知道，中国是一个有着悠久历史的美丽国家。

2． The earth , as we know , moves round the sun .

地球，我们都知道，围着太阳转。

3． Tom works hard and is willing to help others, as we all know.

汤母工作努力，并且乐于助人，这一点我们都知道。

⑵ 非限制性定语从句中的谓语为被动式时，常用as做主语

be said/known/announced/reported/mentioned/expected/discussed

1. Grammar , as has been said before, is not a set of dead rules.

语法，就像以前所说，不是一套死规则。

2. As is known to all , TaiWan is part of China .

⑶ as引导非限制性定语从句，有“如，似，正像”的含义，因此，下列句式多用as

as has been said above

如上所说

as anybody can see

正像每个人所看到的那样

as we had expected

正如我们所预料的那样

1. Things are not always as they appear.

事情并不一直像他们表面那样。

2. The boy has as much progress as we had expected.

正像我们所预料的那样，这个男孩取得了大的进步。




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.
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 引导的定语从句可置于句首，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

先行词:是在定语从句中,被定语从句所修饰的名词.例如:
He is a teacher who teach our English.在这里定词从句who teach our English是来修饰前面的名词teacher.所以teacher就是一个先行词.
再说下它的用法：
1、先行词指人时，引导词可用Who,Whom,及that,其中当引导词在句中作主语时用Who或that；当其充当宾语时用whom或that，在非正式宾语中也可用who，也可省略。
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改为：The person(that/whom/who)you just talked to is Mr Li.

2、先行词指物时，引导词用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.

3、先行词指时间时，引导词用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.

4、先行词指地点时，引导词用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.

5、whose在定语从句中作定语时，可用来指人，也可以用来指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.

6、先行词表示原因时，引导词用why,如:
The reason why he was late for school was that he had been knocked down by a bike.

二、物殊情况：

尽管有以上基本原则，但要学好定语从句更应注意以下特殊情况；

Ⅰ、当定语从句的先行词为表示人的不定代词，如 anyone,anybody,everyone,everybody,noone,nobody,all， these ，those等时,用who而不用that
Those who break the rule are pulished.
Anybody who had eyes could see the elephant was like a snake.

Ⅱ.以who或which作主语的特殊疑问句中先行词指人，引导词只用That,如:
a.Who is the person that is standing at the gate ?
b.Which of you that knows something about English doesn’t know this word?

Ⅲ、先行词指物时引导词用that而不用which的情况:
1、先行词有序数词或形容词最高级修饰时，
This is the best composition that has been written in English.
2、先行词是all,something,anything,nothing,everything,little,few,much等不定代词时
There is nothing/little/much that we can do for her.
3、先行词被all,every,no,some,any,little,much等修饰时
I’ve read all the books that you gave me.
4、先行词被the only/very等修饰时
This is the very/last place that they visited yesterday.
5、有两个以上先行词，分别表示人或物时
They talked about the teachers and the schools that they had visited.
6、先行词为基数时
Yesterday I caught two fish,Now you can see the two that are still alive in a basin of water.

Ⅳ.time为先行词时，前边如有序数词修饰时，定语从句引导词用that或什么也不用，如没序数词修饰时，用when或that均可
a.This is the last time(that)I shall give you a lesson.

先行词指人时，引导词可用Who,Whom,及that,其中当引导词在句中作主语时用Who或that；当其充当宾语时用whom或that，在非正式宾语中也可用who，也可省略。
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改为：The person(that/whom/who)you just talked to is Mr Li.

2、先行词指物时，引导词用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.

3、先行词指时间时，引导词用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.

4、先行词指地点时，引导词用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.

5、whose在定语从句中作定语时，可用来指人，也可以用来指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.

6、先行词表示原因时，引导词用why,如:
The reason why he was late for school was that he had been knocked down by a bike.

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马边彝族自治县15235187353： 先行词的用法 - ？
蔺别保泉： 先行词为定语从句的标志,有先行词就可以判定句子为定语从句.先行词可以是名词,代词等.先行词在定语从句句首,后面跟一个引导词,再跟从句.

马边彝族自治县15235187353： 先行词用在什么地方的啊?怎么用啊? - ？
蔺别保泉： 先行词为定语从句所修饰的名词,位于定语从句之前. LZ你应当研究定语从句,先行词并没有特殊的用法,倒是定语从句的关系代词或关系副词,才是关键.

马边彝族自治县15235187353： 英语中说的先行词指什么,最好能举几个例子,先谢谢啦 - ？
蔺别保泉： 先行词是定语从句的引导词前面的名词.在定语从句中充当一定的成分. 被定语从句修饰的名词、代词称为先行词. 我们可以这样认为, 之所以称它为先行词, 是因为修饰它的定语从句总是放在它之后, 先行词总是出现在定语从句之前, 而不同...

马边彝族自治县15235187353： 定语从句先行词怎么用 - ？
蔺别保泉： 定语从句(一)概念:He is the boy who often goes to school late. 先行词 关系词 定语从句关系代词: that, which, who, whom, whose(定语)注:在定语从句中作主语或作宾语.关系副词: when, where, why, how.注:在定语从句中作状语. (二)原则: a. 定语从句必须紧跟在先行词后面,限制修饰先行词.b. 定语从句必须用关系词来引导.c. 关系词在定语从句中作一个句子成分. (三)定语从句可分为两大类,即限制性定语从句和非限制性定语从句.

马边彝族自治县15235187353： 什么叫先行词啊我英语基础不太好,麻烦详细点, - ？
蔺别保泉：[答案] 先行词是定语从句的引导词前面的被定语从句所修饰的名词、代词.在定语从句中充当一定的成分.我们可以这样认为,之所以称它为先行词,是因为修饰它的定语从句总是放在它之后,先行词总是出现在定语从句之前,而不同于普通...

马边彝族自治县15235187353： 什么是先行词,在什么时候要用that,什么时候用which什么时候用who........... - ？
蔺别保泉： 楼上对先行词的理解基本正确,但举例中第三句没这样的表达,可以改为:I saw the woman who was Mrs.**. 最后两句是宾语从句的例子,句中也就没有先行词可言了. 何谓定语从句?顾名思义,作定语的句子就叫作定语从句.定语从句所修饰、...

马边彝族自治县15235187353： 先行词的使用 - ？
蔺别保泉： 一、关系代词(在句中作主语、宾语或定语) 1. that既可代表事物也可代表人,which代表事物;它们在从句中作主语或宾语,that在从句中作宾语时常可省略关系词,which在从句中作宾语也可以省略.[eg:this is the book (which)you want.]而且...

马边彝族自治县15235187353： 英语中的先行词什么意思 - ？
蔺别保泉： 先行词:是在定语从句中,被定语从句所修饰的名词.例如: He is a teacher who teach our English.在这里定词从句who teach our English是来修饰前面的名词teacher.所以teacher就是一个先行词. 再说下它的用法: 1、先行词指人时,引导词可用...

马边彝族自治县15235187353： 从句中 先行词的概念? 请简要且完整 - ？
蔺别保泉： 1、先行词指人时,引导词可用Who,Whom,及that,其中当引导词在句中作主语时用Who或that;当其充当宾语时用whom或that,在非正式宾语中也可用who,也可省略. a That boy who/that broke the window is called Tom. b The person to whom...

马边彝族自治县15235187353： 定语从句中的先行词怎么用?？
蔺别保泉： 通常情况下,先行词和定语从句是挨着的,但是在不引起歧义的情况下,可以把定语从句和先行词分开,这叫分隔定语从句.例:He is a student in my school who often helps others.先行词是student与从句分开.因为定语从句的先行词是名词或代词.所以这句话中有可能是先行词的词是He,student,school,但是从句的引导词who的先行词只能是人,所以排除school,再通过翻译,所以确定,先行词就是student.从句没有和先行词挨着,因为我们经过判断知道了他要表达的意思.所以从句可以和先行词分开.有很多问题我都是上问问堂找老师问的,你也可以去试试.