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定语从句why的用法(共9篇)
定语从句why的用法（一）:
why在状语从句中用法
why不能引导状语从句,可引导定语从句或宾语从句等.你是不是觉得why可引导原因状语从句?下面我着重加以说明.
状语从句,顾名思义就是在句中起状语作用的句子,这类从句一般放在句后,强调时放在句首.状语从句通常用来修饰谓语动词、其它动词、定语、状语或整个句子,一般可以分为：
1时间状语从句2.地点状语从句；3.原因状语从句；4.条件状语从句；5.目的状语从句；6.让步状语从句；7.比较状语从句；8.程度状语从句；9.方式状语从句；10.结果状语从句.
至于原因状语从句,它有下面引导词：because,as,since,for,seeing (that),now (that),considering (that),in that都表示原因.because语势最强,回答why提出的问题,用来说明人所不知的原因.当能够很明显的看出原因或人们已知原因,就用as或since.
The woolly shrank because it was washed badly.毛衣因洗得不得法而缩水.
I can’t get to sleep because of the noise outside.由于外面声音嘈杂我睡不着.
Since /As we’ve no money,we can’t buy it.由于我们没钱,我们无法购买它.
Seeing that it’s raining,we’d better stay indoors.既然外边在下雨,我们最好待在室内.
Now that you are here,you’d better stay.你既然来了,最好还是留下吧(既来之,则安之).
【注】除以上提到的比较熟悉的引导原因状语从句的从属连词外,when有时也可引导原因状语从句(when表示“既然”)
I won’t tell you when you won’t listen.既然你不想听,我就不告诉你了.
可见why并不能引导原因状语从句.
定语从句why的用法（二）:
定语从句的用法和注意事项
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．
2 定语
编辑本段（一） 限定性定语从句
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在从句中作宾语则不能省略.而且,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
2. which作宾语时,根据先行词与定语从句之间的语义关系,先行词与which之间的介词不能丢
3. 代表物时多用which,但在带有下列词的句子中用that而不用which,这些词包括当先行词是anything, everything, nothing ,few, all, none, little, some等代词时,或者是由every, any, all, some, no, little, few, much等修饰时等,这时的that常被省略
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. where是关系副词,用来表示地点的定语从句
6. 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 arrive in London, we will have stayed there for two weeks. I still remember the first time I met her. Each time he goes to business trip, he brings a lot of living necessities, such as towers, soap, toothbrush etc.
7. 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.
8. 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.
编辑本段（二）非限定性定语从句
非限定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
1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
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.
4. 有时as也可用作关系代词
5. 在非限定性定语从句中,不能用关系副词why和关系代词that,而用who, whom代表人,用which代表事物.；
编辑本段（三）关系代词引导的定语从句
1.who指人,在从句中做主语
(1) The boys who are playing football are from Class One.
(2) Yesterday I helped an old man who lost his way.
2. whom指人,在定语从句中充当宾语,常可省略.
(1) Mr. Liu is the person (whom) you talked about on the bus.
(2) Mr. Ling is just the boy whom I want to see.
注意：关系代词whom在口语和非正式语体中常用who代替,可省略.
(3) The man who/whom you met just now is my friend
3.which指物,在定语从句中做主语或者宾语,做宾语时可省略
(1) Football is a game which is liked by most boys.
(2) This is the pen (which) he bought yesterday.
如果在从句中做宾语,就用whom或who.比如: He is the man whom/who I talk to.
如果是在从句中作主语就只能用who.比如: He is the man who has an English book.
4. that指人时,相当于who或者whom；指物时,相当于which.
在定语从句中做主语或者宾语,做宾语时可省略.
(5) The number of the people that/who come to visit the city each year rises one million.
(6) Where is the man that/whom I saw this morning?
5. whose通常指人,也可指物,在定语从句中做定语
(1) He has a friend whose father is a doctor.
(2) I once lived in a house whose roof has fallen in.whose指物时,常用以下结构来代替
(3) The classroom whose door is broken will soon be repaired.
(4) The classroom the door of which is broken will soon be repaired.
(5) Do you like the book whose cover is yellow?
(6) Do you like the book the color of which is yellow?
编辑本段（四）注意
介词+关系代词引导的定语从句关系代词在定语从句中做介词宾语时
从句常由介词+关系代词引导
(1) The school (that/which) he once studied in is very famous.
(2) The school in which he once studied is very famous.
(3) Tomorrow I will bring here a magazine (that/which) you asked for.
(4) Tomorrow I will bring here a magazine for which you asked.
(5) We’ll go to hear the famous singer (whom/that/who) we have often talked about.
(6) We’ll go to hear the famous singer about whom we have often talked.
注意：1. 含有介词的动词短语一般不拆开使用,如：look for, look after, take care of等
(1) This is the watch which/that I am looking for. (T)
(2) This is the watch for which I am looking. (F)
2. 若介词放在关系代词前,关系代词指人时用whom,不可用who或者that；指物时用which,不能用that；关系代词是所有格时用whose
(1) The man with whom you talked is my friend. (T)
(2) The man with that you talked is my friend. (F)
(3) The plane in which we flew to Canada is very comfortable. (T)
(4) The plane in that we flew in to Canada is very comfortable. (F)
3. “介词+关系代词”前可有some, any, none, both, all, neither, most, each, few等代词或者数词
(1) He loved his parents deeply, both of whom are very kind to him.
(2) In the basket there are quite many apples, some of which have gone bad.
(3) There are forty students in our class in all, most of whom are from big cities.
编辑本段（五）关系副词引导的定语从句
1. when指时间,在定语从句中做时间状语
(1) I still remember the day when I first came to the school.
(2) The time when we got together finally came.
2. where指地点,在定语从句中做地点状语
(1) Shanghai is the city where I was born.
(2) The house where I lived ten years ago has been pulled down.
3. why指原因,在定语从句中做原因状语
(1) Please tell me the reason why you missed the plane.
(2) I don’t know the reason why he looks unhappy today.
注意：关系副词引导的从句可以由“介词+关系代词”引导的从句替换
(1) The reason why/ for which he refused the invitation is not clear,
(2) From the year when/in which he was going to school he began to know what he wanted when he grew up.
(3) Great changes have taken place in the city in which./where I was born.
编辑本段（六）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.不及物动词后面无宾语,就必须要求用关系副词或者是介词加关系代词；而及物动词后接宾语,则要求用关系代词.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 ago?
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) .
编辑本段（七）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 ,where和why 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?
This is the reason why he came late.
This is the reason for which he came late.
编辑本段（八）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)
编辑本段（九）as,which引导的非限定性定语从句
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 knew, 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.
编辑本段（十）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,the same,the last,just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.
(f) 先行词指物,在主句中作表语时．
(g) 为了避免重复．
(h)先行词是the way时
举例：
Is this the book that you borrowed in the library?
这是你在图书馆借的那本书吗?
Who that break the window should be punished．
谁打碎了窗户都要受到惩罚．
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.
编辑本段（十一）难点分析
（一）限制性定语从句只能用that的几种情况
1．当先行词是anything, everything, nothing (something 除外), few, all, none, little, some等代词时,或者是由every, any, all, some, no, little, few, much等修饰时
(1) Have you taken down everything that Mr. Li has said?
(2) There seems to be nothing that seems impossible for him in the world.
(3) All that can be done has been done.
(4) There is little that I can do for you.
注意：当先行词指人时,偶尔也可以用who
(4) Any man that/.who has a sense of duty won’t do such a thing.
2. 当先行词被序数词修饰
(1) The first place that they visited in London was the Big Ben.
3. 当先行词被形容词最高级修饰时
(1) This is the best film that I have seen.
4. 当形容词被the very, the only 修饰时
(1) This is the very good dictionary that I want to buy,
(2) After the fire in his house, the old car is the only thing that he owned.
当先行词指人时,偶尔也可以用who
(3) Wang Hua is the only person in our school who will attend the meeting?
5. 当先行词前面有who, which等疑问代词时
(1) Who is the man that is standing there?
(2) Which is the T-shirt that fits me most?
6. 当先行词既有人,也有动物或者物体时
(1) Can you remember the scientist and his theory that we have learned?
（二）关系代词as和which引导的定语从句as和which引导非限制性定语从句,有相同之处也有不同之处.具体情况是：
1．As和which都可以在定语从句中做主语或者宾语,代表前面整个句子.
(1) He married her, as/which was natural.
(2) He was honest, as/which we can see.
2. as 引导非限制性定语从句,可放在主句之前,或者主句之后,甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后.另外,as有“正如……,正像……”的意思
(1) As is known to all, China is a developing country.
(2) He is from the south, as we can see from his accent.
(3) John, as you know, is a famous writer.
(4) He has been to Paris more than several times, which I don’t believe.
注意：当主句和从句存在逻辑上的因果关系时,常用which
(5) Tom was always late for school, which made his teacher angry.
3. 当先行次受such, the same修饰时,常用as
(1) I have never heard such a story as he tells.
(2) He is not such a fool as he looks.
(3) This is the same book as I lost last week.
注意：当先行词由the same修饰时,偶尔也用that引导定语从句,但是和由as所引导的定语从句意思不同
(4) She wore the same dress that she wore at Mary’s wedding.
她穿着她在MARY婚礼上穿过的一条裙子.
(5) She wore the same dress as her young sister wore. 她穿着和她妹妹所穿的一样的裙子.
(三）以the way为先行词的定语从句通常由in which, that引导,而且通常可以省略.
(1) The way in which/ that/./ he answered the question was surprising.
(四) but有时也可以做关系词引导定语从句
(1) There are very few but understand his idea.
( but= who don’t )
(五) 区分定语从句和同位语从句
1．定语从句修饰先行词,它和先行词是修饰关系；
同位语从句说明先行词的具体内容,是补充说明的关系
(1) The plane that has just taken off is for London. 定语从句
(2) The fact that he has been dead is clear. 同位语从句
2．定语从句由关系代词或者关系副词引导,关系词在句中充当成分,有时可以省略；
同位语从句主要由that引导,在句中一般不做成分；
句子也可以由when, where, how, why, whether, what等词引导,充当成分
(1) The news he told me is true.
(2) The news that he has just died is true.
(3) The problem that we are facing now is how we can collect so much money. 定语
(4) The problem how we can collect so much money is difficult to solve.
3. 同位语从句和先行词一般可以用be动词发展成一个完整的句子,而定语从句不可以
(1) The idea that we could ask the teacher for advice is wonderful. 同位语
(2) The idea was that we could ask the teacher for advice.
(3) The fact that the earth moves around the earth is known to all.
(4) The fact is that the earth moves around the earth.
18. 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）
〔定语从句〕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.例如：
This is the house in which I lived two years ago. 这是我两年前住过的房子.
This is the house where I lived two years ago.
Do you remember the day on which you joined our club? 还记得你加入我们俱乐部的那一天吗?
Do you remember the day when you joined our club?
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以上
定语从句why的用法（三）:
用why引导的定语从句,7应该如何用
一般是放在reason后面的,但是也有一些情况不是用why,你先要看看从句缺什么成分,why是关系副词,在从句中只能够充当状语的成分,表示原因状语譬如说:The reason why the boy was late for school was accepted by his his teacher.why the boy was late for school 是句子中的从句,从句中不缺主谓宾,所以应该用why来引导,作为从句中的状语成分.句子的意思是：那个老师接受了那男孩迟到的原因.
定语从句why的用法（四）:
why 的多种用法【定语从句why的用法】
1.why可以用作疑问副词,表示“为什么”,用来询问发生某一动作或存在某一情况的原因、理由,构成“Why + 一般疑问句”的特殊疑问句.例如:Why do you like dogs?你为什么喜欢狗2.在定语从句中只要先行词是the reason,它...
定语从句why的用法（五）:
定语从句的种类及用法
2种.限制性和非限制性定语从句
1、 定语从句在句中修饰某个名词或代词,被定语从句修饰的词叫先行词.定语从句需用下列关联词：
关系代词 关系副词
起连词作用,本身做从句的主语、宾语、表语或定语 起连词作用,本身在从句中作时间、地点或原因状语
who,whom,that,whose,which,as when,where,why
2、 掌握以上关系代词、关系副词的含义及使用时,要特别注意以下几点：
1） 指人时宜用who 的情况：
a.当先行词是 one,ones,anyone 或 those 时,关系代词用 who.
Anyone who goes there will be punished.
b.在there be 开头的句子中.
There’s a beautiful girl who came to see you this morning.
c.先行词后有一个较长的定语.
I met a foreigner in the city last week who could speak Chinese well.
d.在非限定性定语从句中.
She has a brother,who worked at that factory ten years ago.
2) 指物时宜用 that 的情况：
a.当先行词为 all,much,little,few,none,something,anything,everything,nothing 等不定代词时.All that can be done has been done.
b.当先行词既指人又指物时.
He spoke of the men and the thing (that) he had seen abroad.
c.当先行词被序数词或形容词的最高级修饰时.
This is one of the best films that I have ever seen.
d.当先行词被 the very,the only,the last,any,every 等修饰时.
This is one of the very book that I am looking for.
e.当先行词是疑问词 who,what,which 时.
Who that has such a home doesn’t love it?
f.关系代词在从句中作表语.
Mary is no longer the girl that she used to be.
3) 只能用 which 不能用 that 的情况.
a.引导非限定性定语从句修饰某物或整个句子.
Bruce went towards the fire,which was still smoking.
Tom came back late,which made his parents very angry.
b.关系代词作介词的宾语.This is the house in which Lu Xun once lived.
4) 关系代词 as 和which都能引导非限定性定语从句代表整个句子的内容,as
引导的从句可位于句首或句末,which引导的定语从句则不能位于句首.
Which you know,he is a good man.(×)
As you know,he is a good man.(√)
6)关系副词when,where,why其含义相当于on which,in which for which等,可以互换：
The day when /on which I met him first was May 1st.
I don’t know the reason why /for which he didn’t come.
7)whose指物时,可以与of which等结构互换,但应注意与冠词的位置关系：
This is the book the cover of which / of which the cover / whose cover is blue.
8)有时可用代替关系副词.在口语中常省略.
This is the reason (why / for which / that) he came late.
9)先行词是专有名词、整个句子或世界上独一无二的物质名词时,一般用非限定性定语从句修饰.The sun,which gives us light and heat,is very big.
10)在先行词和定语从句之间有无逗号有时会引起名义的变化：
He said nothing that made her angry.他没说使她生气的话.
He said nothing,which made her angry.他一言不发,这使她很生气.
3、 定语从句与强调结构
It is the place where they lived before.
It is in the place that they lived before.
第一个句子为定语从句,where指代the place,在定语从句中作状语,第二个句子为强调结构,强调in the place,that没有意义,把放回后面句子,句子意思完整.
Where is it that he found the lost watch?(强调句型,强调疑问副词where.)
Where is the watch he found yesterday?(定语从句,that指代the watch.)
4、 定语从句中的先行词
Is this book the one that you bought yesterday?
Is this the book that you bought yesterday?
第一个句子中,this book是主句的主语,the one是先行词.在第二个句子中this是主句的主语,the book是先行词.一定要避免出现：Is this book that you bought yesterday?
5、 定语从句与同位语从句
定语从句相当于形容词,它对先行词起修饰、描述或限制作用,而同位语从句则相当于名词,对其前面的词给予说明或作进一步解释,即说明该词所表示的具体内容.例如：
The news that we heard is not true.(定语从句)
The news that he won the prize is not true.（同位语从句）
另:在“have no idea ＋从句”结构中,其从句都作idea的同位语.例如：
I have no idea when she will be back.
定语从句why的用法（六）:
有关所有定语从句引导词的用法?+例题?
高考英语定语从句常见考点归纳定语从句是中学英语教学的重点,也是学生学习的难点,同时又是高考考查的热点.纵观近年各地高考试题,就能发现考点大多集中在带有"插入语"的定语从句；which 、as 引导的非限定性定语从句； where 、 when引导的定语从句以及定语从句和强调句、同位语从句的区别等方面.对定语从句的考查不单纯考查其语法结构,而是把它融入到一定的语境中,考查考生的实际综合运用能力. 高考试题中,主要从以下角度考查定语从句： 定语从句的考点之一 正确区分关系代词that引出的定语从句功能强,除不能作定语(用whose)外,其它几个功能都可用that.但命题角度主要以that与which指物时的区别为重点进行命制.例如：（1）——Do you have anything in mind _________ you’d like for supper?——Well, _________ is OK with me.A. that ; anything B. which ; everythingC. what ; whatever D. where ; something 选A.（2）The wrong you"ve done him is terrible, for ______ you should make an apology to him, I think.A. this B. which C. what D. that 选B. 定语从句的考点之二 正确区分关系代词(that或which)与关系副词when(表时间)、where(表地点)、why(表原因).重点根据定语从句中所缺成分（即关系词在定语从句中作状语时,使用关系副词when (on which); where(in which); why(for which)；在定语从句中作作主语、宾语或表语时,使用that或which.）来确定是用关系代词还是关系副词,绝不能因先行词是时间名词就用when,是地点名词就用where,是reason就用why来确定.因此,认准先行词只是选择关系词的一个方面,更重要的是看其在后面定语从句中充当什么句子成分例如：（3）He should stand near the stage ________ he could watch and follow the play.A. where B. when C. that D. there 选A.（4）Do you think the reason _______ he gave is believable.A. for which B. which C. why D. what 选B.（5）We are living in an age _______ many things are done on computer.A. which B. that C. whose D. when 选D. 定语从句的考点之三 当先行词在定语从句中作主语时,应注意主谓语的一致性及被动语态问题.尤其要注意在考题中不用定语从句,而是用分词短语作定语.例如：（6）The first textbooks ______ for teaching English as a foreign language came out in the 16th century. A. having written B. to be written C. being written D. written 选D.（7）The train that stands at platform 7 / standing at platform 7 is for Wuhan.（8）Any article that is left in these buses / left in these buses will be taken at once to the Lost Property Office. 定语从句的考点之四 定语从句中不能再重复与先行词有关的代词或副词.必须牢记定语从句中关系词已经替代先行词并且在定语从句中已经充当其成分,故不能再用相关的代词或副词.例如：（8）He made another wonderful discovery, _______ of great importance to science.A. which I think it is B. which I think isC. which I think it D. I think which is 选B.（9）This is the hospital _____ they visited last year and is the one _____ I worked in five years ago．A．that；where B．where；thatC．where；where D．that；that 选D.（10）There are dirty marks on her trousers ________ she had wiped her hands.A. that B. which C. where D. when 选C. 定语从句的考点之五 对介词后接关系代词而不接关系副词的考查；当关系代词作介词宾语,且该介词不是和从句的谓语动词构成固定短语时,介词可以提前,这样就出现"介词+关系代词".先行词指物,用"介词+which", 指人则用"介词+whom", 且两个关系代词均不能省略,介词的选择要遵循两个原则：1.根据定语从句中谓语动词与先行词的搭配内容而定. 2.根据先行词特殊用法而定.例如：（11）This flower doesn"t do well in soil other than the one_____ it has been specially developed．A．for which B．that C．of which D．where 选A.（12）Anyway, that evening, ____I will tell you more about later, I ended up staying at Rachel"s place.A. when B. where C. what D. which 选D. 定语从句的考点之六 关系代词as的考查.关系代词as引导限制性定语从句时既可指人又可指物.它只能替代由such,the same等修饰的先行词；as引导非限制性定语从句时,可放于句首,句中或置于句尾,而which则只能置于主句之后.但如果定语从句为否定句或表示否定意义,使用which.As引导的定性定语从句有"正如"之意,而which引导的没有.例如：（13）Our teacher set us such a difficult maths problem _____ we could not work out.A. that B. which C. as D. even 选C.（14）Carl said the work would be done by October , _______ personally I doubt very much.A. it B. that C. when D. which 选D.（15）________ is reported in the newspaper , talks between the two countries are making progress.A. It B. As C. That D. What 选B. 定语从句的考点之七 解题时要注意题干的内容和句子的结构,（进行必要的语法分析,弄清句子结构.）再行答题.例如：（16）The teacher wanted to teach us ___ he knew at this last lesson.A. all which B. all whatC. of which D. everything which 选B.（17）Meeting my uncle after all these years was an unforgettable moment , _______ I will always treasure.A. that B. one C. it D. what 选B.（18） Mrs Brown was much disappointed to see the washing machine she had had _____went wrong again.A. it repair B. it repairedC. repaired D. to be repaired 选C.（19）______is well-known that Antarctica is difficult to reachA. It B. What C. As D. Which 选 A（20）_______is well-known , Antarctica is difficult to reach.A. It B. What C. As D. which 选C.（21）_______is well-known is that Antarctica is difficult to reach.A. It B. What C. As D. which 选B. 虽然定语从句的结构和用法比较复杂,但只要从定语从句的形式上、结构上和用法上来分析理解和比较,就一定就能把握定语从句的用法.
定语从句why的用法（七）:
why的用法?
为什么
Is that the reason_________you are in favour of the proposal?选why
The reason is______he is unable to operate the machine.选that【定语从句why的用法】
作为关系副词 的why 引导定语从句时= for which
第一句 是定语从句 why 引导定从 并作 定从中的状语 = for which
也就是 you are in favour of the proposal for the reason
第二句 填that 这是表语从句
that he is unable to operate the machine.就是 the reason本身
why 也可以引导表语从句中 但意思不同 且主语不能是 the reason
如 the question is why he is unable to operate the machine.
定语从句why的用法（八）:
英语定语从句中that、what、where、which、why、whose、等引导定语从句的词的用法
如：I like music that I can dance to.这个句子中的that可不可以换成which 、或what?
请英语老师或擅长英语的同学帮帮我,急啊!就是详细的说一下如果用什么词,这个句子应有什么特征或满足什么结构之类的,最好有例句.谢谢了!
在复合句中用作定语的从句称为定语从句.定语从句通常位于所修饰的名词或代词之后,常由关系代词或关系副词引出,被修饰的词称为先行词.常见的关系代词有：who\whom\which\that\whose,关系副词有：when\why\where.
一、先行词为指人的名词或代词时,定语从句用who或that来引导.例如：Do you know the girl who is in a red dress.你认识那个穿红衣服的女孩吗?
The man who we saw that day hasn"t come here yet.那天我们见到的那个人还没有来这儿.
二、先行词是指物的名词或代词时,用which或that, which或that在从句中做主语或宾语.例如：She works in a shoe factory which\that is far from here.她在离这儿很远的一家鞋厂工作.
三、只能用关系代词that引导的几种情况：A、当先行词是anything,nothing,everything等不定代词时.例如：I"m sorry to tell you that there is nothing that I can do for you.很抱歉告诉你,我帮不上忙.
Is there anything that you want to buy in town?你在城里有什么东西要买吗?
B、当先行词是最高级或被最高级修饰时.例如：This is the best way that can solve the problem.这是解决问题的最好方法.
This is the most beautiful flower that I have seen.这是我看到的最美的花.
C、当先行词被first,last,only,very,no,just,any,little等词修饰时.例如：She asked for the last book that was on the subject.她要了有关这个科目的最后一本书.
This is the only one that I"m looking for.这是我正在找的唯一的一个.
四、who引导的定语从句
A、who引导的定语从句的先行词为表示人的名词或代词.例如：The boy who is standing under the tree is Peter.
B、who在定语从句中作主语时不能省略；但在非正式的英语中,who也可作宾语,且可以省略.例如：The person who was here yesterday is a teacher.
The man (who) I saw just now is Mr Liu.
C、在定语从句中,who在人称、数上和其前面的先行词保持一致.例如：Do you know the boy who is standing over there?
D、若先行词中既有人又有物,关系代词用that,而不用who.例如：He watched the children and boxes that filled the car.他看见了塞满汽车的孩子和盒子.
E、若先行词前面有形容词最高级、序数词修饰,关系代词用that而不用who.例如：Yao Ming is the best basketball player that I kown.
五、当先行词为地点名词时,用关系副词where引导.例如：This is the place where we came last summer.
六、当先行词为表示时间的名词时,用关系副词when来引导.例如：She came on the day when I was not at home.她来的那天我不在家.
这些都是我上课做的笔记,唔,码字好辛苦的~~手都酸了,不过对我自己也有帮助的呢,我也复习了一遍……(*^__^*) 嘻嘻……希望对你有所帮助.
啊,还有,你问的问题我觉得that可以换成which,不能用what. 嗯,我是学生,建议你问问你的老师……
定语从句why的用法（九）:
英语中定语从句关系词的用法?
英语定语从句关系词的用法与区别定语从句即指在主从复合句用作定语的从句.定语从句通常修饰名词或代词,对它进行限制、描绘和说明.受定语从句修饰的词语叫先行词,引导定语从句的词语叫关系词.关系词按其性质又分关系代词和关系副词.关系词不仅引导定语从句,同时还在定语从句充当一定的句子成分.
一、关系词的用法特点关系词分关系代词和关系副词.关系代词主要有 that,who,whom,whose,which,as 等,其中who等,其中whowhom 只用于指人,which和as 只用于指事物,whose和 that既可于指人也可用于指物,它们在定语从句可用作主语、宾语、表语或定语；关系副词主要有when,where 和why,其中when表示时间,whenwhere表地点,why表原因,它们在定语从句中均用作状语：The dog which [that] was lost has been found.丢失的狗找到了.(which / that指物,在从句中用作主语)I have forgotten everything that I learnt at school.我把学校学的所有东西都给忘了.(that指物,在从句中句作宾语(that)The man who lives in that house is my uncle.住在那座房子里的人是我叔叔.(who指人,在从句中作主语)It was an island whose name I have forgotten.这是一座岛,名字我忘了.There are some students whose questions I can’t answer.有些学生提出的问题我回答不了.(whose指人,在从句中作定语)
二、关系词的选择选择关系词可考虑以下四点：(1) 一看先行词的意义,即分清先行词是指人、指物、时间、地点还是原因(如指物时不能用who或whowhom,指人时通常不用which等).(2) 二看关系词的句法功能,即分清关系词是担任什么句子成分,是作主语还是宾语、是作定语还是状语等(如作定语通常用whose,有时也用which；作状语要用when,where,why)；作状语要.(3) 三看定语从句的种类,即分清是限制性定语从句还是非限制性定语从句(如that和why通常不引导非限制性定语从句).(4) 四看文体,即分清是正式文体还是非正式文体,是书面语体还是口语体.(4)
三、两组关系词的用法区别1.that 与 which的用法区别两者都可指物,有时可互换.其区别主要在于：(1) 引导非限制性定语从句时,通常只用which：He drove too fast,which was dangerous.他开车很快,这是很危险的.(2) 直接放在介词后作宾语时,通常只用which：whichThe tool with which he is working is called a hammer.他干活用的那个工具叫做锤子.(3) 当先行词是much,little,none,all,few,every(thing),any(thing),no(thing) 等不定代词或受其修饰时,通常用that：All [Everything] that can be done must be done.凡能做的事都必须做.(4) 当先行词受the very,the only,the same 等修饰时,通常用that：This is the only example that I know.我知道的例子只有这一个.Those are the very words that he used.那是他的原话.(5) 当先行词有形容词最高级或序数词(包括last,next等)等修饰时,通常用that：This is the best dictionary that I’ve ever used.这是我用过的最好的词典.The first thing that you should do is to work out a plan.你应该做的第一件事是订个计划.(6) 当关系代词在定语从句中用作表语时,通常用that：China is not the country (that) it was.中国已不是过去的样子了.(7) 当先行词是一个既指人又指物的并列词组时,通常用(7) that：
They talked about the persons and things that most impressed them.他们谈论了使他们印象最深的人和事.
(8) 当要避免重复时：Which is the course that we are to take?我们选哪门课程?2.that与who的用法区别(1) 两者均可指人,有时可互换：All that [who] heard him were delighted.所有听了他讲话的人都很高兴.Have you met anybody that [who] has been to Paris?你遇见过到过巴黎的人吗?He is the only one among us that [who] knows Russian.他是我们中间惟一懂俄语的人.(2) 但是在下列情况,通常要用 that：①当先行词是一个既指人又指物的并列词组时：I made a speech on the men and things that I had seen abroad.我就我在国外所见到的人和事作了报告.②当先行词是who时(为避免重复)：Who that has sympathy can laugh on that occasion?有同情心的人谁会在那个时候发笑呢?③当关系代词在定语从句中作表语时(可省略)：Tom is not the boy (that) he was.汤姆这孩子已不是以前那个样子了