定语从句的使用方法
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.
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，在非正式文体中that常被省略（正式文体中不可省略），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.
他不太可能找到他四十 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。
例如：
（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
定语从句及相关术语
1.定语从句：修饰一个名词或代词的从句称为定语从句，一般紧跟在它所修饰的先行词后面。2.关系词：引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。关系代词有that, which, who, whom, whose, as等；关系副词有where, when, why等。关系词常有3个作用：1，引导定语从句。2，代替先行词。3，在定语从句中担当一个成分。
，名词，代词，数词，分词，副词，不定式以及介词短语来担任，也可以由一个句子来担任．
定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句．
I. 限制性定语从句的特殊用法
II. 非限制性定语从句
III. 同位语从句
IV. 同位语从句和定语从句的区别
I. 限制性定语从句的特殊用法
1. way + 定语从句
way 后面跟定语从句有三种形式。
(1) way + in which + 定语从句
例如：
She was pleased with the way in which he had accepted her criticism.
(2) way + that +定语从句
例如：
They didn’t do it in the way that we do now.
(3) way + 定语从句
例如：
He didn’t speak the way I do.
2. as 引导的定语从句
(1) 在由 as 引导的定语从句中所修饰的词（先行词）前面常有 such 或 the same。
例如：
Such people as you describe are rare nowadays.
I have the same trouble as you (have).
(2) As 在定语从句中可以作主语、宾语或表语。
例如：
Let’s discuss only such questions as concern everyone of us.（作主语）
I never heard such stories as he tells.（作宾语）
I’ve never seen such a clever man as he is.（作表语）
(3) As 有时引导非限制性定语从句，可在定语从句中作主语、宾语、表语，修饰主句，常解释为正如、如同。
例如：
As is known to all, the earth moves round the sun.（作主语）
As was expected, he performed the task with success.（作主语）
As he predicted, the wind changed.（作宾语）
The meeting is very important, as indeed it is.（作表语）
II. 非限制性定语从句
1.非限制性定语从句由 who, whom, which 引导（不可用 that），还可以由 whose, when, where 等词引导。
非限制性定语从句要用逗号隔开，非限制性定语从句可以删去，整个句子的意思还是完整的，而限制性定语从句如果被删去，句子的意思不完整。
例如：
Mr Brown, who is our English teacher, lives near our school.
Yesterday I met my son’s school master, whom you saw at my home last year.
He has finished the difficult exercise, which is easy for you.
The factory is headed by a 35-year-old man, whose wife is from America.
They will fly to Qingdao, where they plan to stay for two weeks.
In these days, when I was a child, the city had no industry to speak of.
注意：非限制性定语从句中的关系词是不可省略的。
2.非限制性定语从句有时并非修饰名词或代词，它可以修饰整个句子。
例如：
They have invited me to visit their country, which is very kind of them.
3.in front of, at the back of, in the middle of 等短语在定语从句中的用法。
如果关系代词是作这类介词短语的宾语时，介词短语必须提前。
例如：
Yesterday afternoon we arrived at his log cabin, in front of which stood a tall
tree.
4.注意此类句子表达方式。
There are forty students in their class, thirty of whom are League members.
也可以改成
There are forty students in their class, of whom thirty are League members.
III.同位语从句
同位语从句常跟在 idea, fact, doubt, thought, belief, news, hope 等词后面，由连接代词 that（不可用 which）和连接副词 when, where, whether 等引导。
例如：
I had no idea that you were here.
The fact that he is unfit for his job is quite clear.
Then arose the question where we were to get the machine needed.
All the time she was in bitter doubt whether she was right.
IV.同位语从句和定语从句的区别
同位语从句用于名词后面，对该名词的内容作进一步说明，连接词在从句中不作成份。
定语从句用于修饰名词或代词，引导定语从句的关系代词或关系副词往往在定语从句中作一个成份。
例如：
Have you heard the news that Mr Smith will come to give a lecture on Irish Fairy Tales?
这里 that 引导的是同位语从句，不可以用 which 代替 that， 连接代词在从句中不作成份。
Have you told him the news that I told you last week?
这里 that 引导的是定语从句，可以用 which 代替 that，它在定语从句中作宾语
1.定语从句：修饰一个名词或代词的从句称为定语从句，一般紧跟在它所修饰的先行词后面。2.关系词：引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。关系代词有that, which, who, whom, whose, as等；关系副词有where, when, why等。关系词常有3个作用：1，引导定语从句。2，代替先行词。3，在定语从句中担当一个成分。
，名词，代词，数词，分词，副词，不定式以及介词短语来担任，也可以由一个句子来担任．
定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句．
I. 限制性定语从句的特殊用法
II. 非限制性定语从句
III. 同位语从句
IV. 同位语从句和定语从句的区别
I. 限制性定语从句的特殊用法
1. way + 定语从句
way 后面跟定语从句有三种形式。
(1) way + in which + 定语从句
例如：
She was pleased with the way in which he had accepted her criticism.
(2) way + that +定语从句
例如：
They didn’t do it in the way that we do now.
(3) way + 定语从句
例如：
He didn’t speak the way I do.
2. as 引导的定语从句
(1) 在由 as 引导的定语从句中所修饰的词（先行词）前面常有 such 或 the same。
例如：
Such people as you describe are rare nowadays.
I have the same trouble as you (have).
(2) As 在定语从句中可以作主语、宾语或表语。
例如：
Let’s discuss only such questions as concern everyone of us.（作主语）
I never heard such stories as he tells.（作宾语）
I’ve never seen such a clever man as he is.（作表语）
(3) As 有时引导非限制性定语从句，可在定语从句中作主语、宾语、表语，修饰主句，常解释为正如、如同。
例如：
As is known to all, the earth moves round the sun.（作主语）
As was expected, he performed the task with success.（作主语）
As he predicted, the wind changed.（作宾语）
The meeting is very important, as indeed it is.（作表语）
II. 非限制性定语从句
1.非限制性定语从句由 who, whom, which 引导（不可用 that），还可以由 whose, when, where 等词引导。
非限制性定语从句要用逗号隔开，非限制性定语从句可以删去，整个句子的意思还是完整的，而限制性定语从句如果被删去，句子的意思不完整。
例如：
Mr Brown, who is our English teacher, lives near our school.
Yesterday I met my son’s school master, whom you saw at my home last year.
He has finished the difficult exercise, which is easy for you.
The factory is headed by a 35-year-old man, whose wife is from America.
They will fly to Qingdao, where they plan to stay for two weeks.
In these days, when I was a child, the city had no industry to speak of.
注意：非限制性定语从句中的关系词是不可省略的。
2.非限制性定语从句有时并非修饰名词或代词，它可以修饰整个句子。
例如：
They have invited me to visit their country, which is very kind of them.
3.in front of, at the back of, in the middle of 等短语在定语从句中的用法。
如果关系代词是作这类介词短语的宾语时，介词短语必须提前。
例如：
Yesterday afternoon we arrived at his log cabin, in front of which stood a tall
tree.
4.注意此类句子表达方式。
There are forty students in their class, thirty of whom are League members.
也可以改成
There are forty students in their class, of whom thirty are League members.
III.同位语从句
同位语从句常跟在 idea, fact, doubt, thought, belief, news, hope 等词后面，由连接代词 that（不可用 which）和连接副词 when, where, whether 等引导。
例如：
I had no idea that you were here.
The fact that he is unfit for his job is quite clear.
Then arose the question where we were to get the machine needed.
All the time she was in bitter doubt whether she was right.
IV.同位语从句和定语从句的区别
同位语从句用于名词后面，对该名词的内容作进一步说明，连接词在从句中不作成份。
定语从句用于修饰名词或代词，引导定语从句的关系代词或关系副词往往在定语从句中作一个成份。
例如：
Have you heard the news that Mr Smith will come to give a lecture on Irish Fairy Tales?
这里 that 引导的是同位语从句，不可以用 which 代替 that， 连接代词在从句中不作成份。
Have you told him the news that I told you last week?
这里 that 引导的是定语从句，可以用 which 代替 that，它在定语从句中作宾语
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。
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）
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。
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) 。
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。
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?
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。
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)
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.
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。
关系代词有that, which, who, whom, whose, as等，关系副词有where, when, why等。
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.]
2. 如果which在从句中作“不及物动词+介词”的介词的宾语，注意介词不要丢掉，而且介词总是放在关系代词which的前边，但有的则放在它原来的位置
3. 代表物时多用which，但在下列情况中用that而不用which：
a)先行词是anything, everything, nothing , none等不定代词时；
b)先行词由every, any, all, some, no, little, few, much等修饰时，这时的that常被省略；
c)先行词前有序数词或被形容词最高级修饰时；
d)先行词中既有人又有物时；
e)整个句中前面已有which，who,that时；
f)当先行词为物并作表语时；
g)先行词为one时；
h)先行词同时又被the only,the very,the same修饰时；
4. who和whom引导的从句用来修饰人，分别作从句中的主语和宾语，whom作宾语时，要注意它可以作动词的宾语也可以作介词的宾语
5. whose是关系代词，修饰名词作定语，相当于所修饰成分的前置所有格.它引导的从句可以修饰人和物, 当它引导的从句修饰物体时, 可以与 of which 调换,表达的意思一样。
关系副词：在句中作状语,关系副词=介词+关系代词,why=for which,where=in/ at/ on/ ... which (介词同先行词搭配),when=during/ on/ in/ ... which (介词同先行词搭配)
1. where是关系副词，用来表示地点的定语从句。
2. when引导定语从句表示时间[注]值得一提的是，表示时间“time"一词的定语从句只用when引导，有时不用任何关系代词，当然也不用that引导。 By the time you arrived in London, we had stayed there for two weeks. 到你到达伦敦的时候，我们在那里已经待了两个星期。 I still remember the first time I met her. 我仍然记得我第一次见到她。 Each time he goes to business trip, he brings a lot of living necessities, such as towels, soap, toothbrush etc。 每一次他去出差，他带来了生活必需品，如毛巾，肥皂，牙刷等，很多。
3. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时，常用there is来引导 There is somebody here who wants to speak to you. 这里有人要和你说话。
非限制性定语从句的作用是对所修饰的成分作进一步说明，通常是引导词和先行词之间用逗号隔开，将从句拿掉后其他部分仍可成立
定语从句常见关系代词的用法在题目中的应用
为了弥补形容词和短语的不足。
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