简述定语从句是怎么回事
题
After supper, he usually stood by the window, ...... he could see the tower, the tallest building of the town.
A. from which B. from where C. on which
D. on where
原句改写成2句
1.After supper, he usually stood by the window.
2. *From the window* he could see the tower, the tallest building of the town.
*from the window* 是A.from which还是B.from where, 一般指地方/位置用from where, 理解为『由那里』。
所以选B.
有几条注意事项 楼主先系统的看一下吧 定语从句由关系代词who、whom、whose、which、what、as和关系副词where、when、why等引导，但须记住： 1.what不能引导定语从句. 2.关系词的分析须考虑它在定语从句中的成分。 一.指人的关系代词有who、whose、whom、that. 试分析： The old man who/whom /that we visited yesterday is a famous artist. Miss Wang is taking care of the child whose parents have gone to Beijing . The man with whom my father shook hands just now is our headmaster. （=The man who/whom that my father shook hands with just now is our headmaster.）注： A． 指人时有时只用who不宜用that。 1．先行词为one、ones或anyone （1）The comrade I want to learn from is the one who studies hard and works hard. （2）Anyone who breaks the law should be punished. 2．先行词为these时 These who are going to Beijing are the best students of our school. 3．在there be 开头的句子中 There is a student who wants to see you. 4．一个句子中带有两个定语从句，其中一个定语从句的关系代词是that，另一个宜用who，以免重复。 The student that won the first prize is the monitor who works hards. 5．在非限制性定语从句中 A。I met a friend of mine in the street, who had just come from Japan. B．主句以who开头的句子中,只用that,不用who。 二．指物的关系代词有which、whose(=of which)、that. 试分析： 1. I like the books which / that were written by Lu Xun. 2. The desks (which/that) we made last year were very good. 3. This is the house in which we lived last year. (= This is the house which /that we lived in last year.) 4. I live in the room whose windows face south. (= I live in the room ,the windows of which face south.) 注： A. 介词如果位于作为其宾语的关系代词之前时，只能用whom、 which不能用who或that. (1). The girl about whom they were talking is our monitor. (2). The book in which there are many interesting things was written by Li Ming. B. 部分短语动词中的介词不可与动词拆开，在定语从句中其介词不可前置，只能放在其动词之后。 Is this the book which she is looking for? The old man who/whom they are waiting for is Professor Li. The child who/whom she is looking after is Wang Ping’s son. C． 指物时，下列情况下只能用that ，不宜用which。 （1）先行词为不定代词，如All、much、anything、everything、nothing、something、none、the one等。 We are willing to do anything that is good to the people. I have told them all (that) I know. All that can be done has been done. （2）先行词是序数词或被序数词、修饰时。 The first book that I read last night was an English novel. （3）先行词是形容词最高级或被最高级修饰时。 This is one of the most interesting films that I have ever seen. This is the best that can be done now. （4）如果有两个或两个以上分别表示人和物的先行词时(先行词既有人又有物)，定语从句的关系代词用which和who都不合适，只能用that。 We know nothing about the doctors and the hospitals that you are talking about. There are sheep and men that can be seen on the hill. （5）如果先行词被the only、the very、the last、the same、any、 few 、little、no、 all 、one of、 just修饰时。 This is the only book that can be lent to you. （6）当主句是以which开头的特殊问句时，关系代词只用that。 Which is the dictionary that he used yesterday ? D．只物时，下列情况下只能用which，不宜用that。 （1）关系代词放在介词之后 This is the factory in which we once worked. （2）非限制性定语从句中 This is the book, which is written by Lu Xun. （3）that，Those作主语时 Those which are on the desk are English books. E．先行词前有such、the same、 as时, 关系代词用as，不用that, 但the same…as…表示同样的, the same…that…表示同一的 He knows as many people as are present at the meeting. Such people as you refer to are rare nowadays. 三．比较When/which、where /which、why. which I still never forget. This is the day when I joined the party. which he spent reading the books. where I found the book. which makes machines. This is the place which we once visited. which I will never forget. which I am looking for. 限制性定语从句与非限制性定语从句的区别： 限制性定语从句 非限制性定语从句 All the students who study hard have passed.学习努力的学生都考试及格了。(只有努力的及格了，不努力的没及格。) All the students ,who study hard have passed.所有的学生都及格了，他们学习努力。（没有人不及格，这些学生都很努力。） 从句是先行词不可缺少的定语（如去掉，主句意思就不完整或不正确。） 从句是对先行词的附加说明（如去掉，主句意思仍清楚，不受影响。） 与主句关系密切，不用逗号 与主句关系不十分密切，用逗号与主句隔开译为汉语时，从句译在先行词前，与先行词用“的”连接 译为汉语时，从句放在主句后面关系代词that可以代替who、whom(指人)、which(指物) 关系代词不用that,只用who、whom(指人)、which(指物) 关系代词代替宾语时可以省略 关系代词不能省略关系代词as和which 先研究下面两个例句： ○1.This elephant is like a snake, as /which everybody can see. =As everybody can see, this elephant is like a snake. 任何人都看得出来，这头象像条蛇。 ○2.Tom didn’t pass the physics exam, which made his parents very angry. Tom物理考试不及格，这使得他父亲很生气。 这两个例句中，as和which所代表的都是整个主句所表示的内容。但有两点不同之处： 1． 在形式上as引导的非限制性定语从句可位于主句的后面，也可位于主句的前面；而which引导的非限制性定语从句只能位于主句的后面，不能位于主句的前面。 2． 在意义上，as引导的定语从句和主句的关系一般为一致关系，常译为“正如……”，“就像……”，而which引导的定语从句和主句的关系是因果关系，或which引导的定语从句是对主句的评论。因此，在意思通顺的情况下，which可代替as，而as许多时候不能代替which，如句○2。再如： 1．He was late again, as / which we had expected. =As we had expected, he was late again. 正如我们所料，他又迟到了。/他又迟到了这是我们早就料到的。 2． The street hasn’t been cleared for weeks, which makes it very dirty. 街道好多星期没有打扫了，因此整条街很脏。（不用as） 3．The young man cheated his friend of much money, which was disgraceful. 那年轻人诈骗了他朋友许多钱财，这是不光彩的。（不用as） 4．He takes exercise everyday, which has done a lot of good to his health. 他每天运动，这对他的身体很有好处。（不用as） 5．As has already been pointed out, English is rather difficult for a foreigner. 正如已经指出的那样，英语对于初学者说，是相当难学的。在such…as…、the same…as…、 as…、 as many…/much as…等结构中,as不能用which代替。如： 1.Such books as this are too difficult for beginners. 这样的书对于初学的人来说是太难了。 =Books such as this are … =Books like this are … 2.I live in the same building as he (does). 我和他住再同一座大楼里。 3.He knows as many people as are present at the meeting. 他认识所有到会的人。 4.That day we all got up early as usual. 那天我们和平时一样，都起得很早。 “One of the +复数名词”后面定语从句中谓语单复数情况 这一结构后面的定语从句的谓语动词通常用复数形式，跟定语从句所靠近的那个复数名词在数上保持一致。如： 1． That is one of the books that are required for study at school. 2． This is one of the most wonderful novels that have been published since 1990. 3． She is one of the few persons who know Spanish . 4． This is one of the most famous plays that were written in the thirties, 如果one of +复数名词这一结构前面带有the only、the very之类的限定语，后面定语从句的谓语动词则要用单数形式，这是因为定语从句在意义上修饰的是而不是那个复数名词。如： 1.He is the only one of the teachers who knows French in our school.( 修饰the only one) He is one of the teachers who know French in our school.( 修饰the teachers) 2.This is the only one of the rooms that is free now. (修饰the only one) This is one of the rooms that are free now. (修饰rooms) as与which引导的定语从句 两者均可引导非限制性定语从句，有时可以互换，但下列情况多用as。 1. 关系代词引导的定语从句居句首时。 As we all know, the earth is round. 2. 当与such或the same连用时，一般用as。 Such books as you tell me are interesting. I have the same plan as you. 3. 当从句和主句语义一致时，用as，反之则用which。 She has married again, as was expected. She has married again, which was unexpected. 4. as在从句中作主语时，后面常接行为动词的被动语态，如be known，be said，be reported等，如从句中行为动词是主动语态，一般要用which作主语。 She has been late again, as was expected. Tom has made great progress, which made us happy.
定语从句 定语从句定语从句及相关术语1.定语从句：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，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。
注：关系代词有主语.宾语之分。一般whom作为宾语。
4.定语：定语用来限定、修饰名词或代词的，是对名词或代词起修饰、限定作用的词、短语或句子，汉语中常用‘……的’表示。主要由形容词担任。此外，名词，代词，数词，分词，副词，不定式以及介词短语也可以来担任，也可以由一个句子来担任．单词作定语时通常放在它所修饰的词之前，作前置定语。短语和从句作定语时则放在所修饰的词之后，作后置定语。
目录[隐藏]
（一） 限定性定语从句
（二）非限定性定语从句
（三）关系代词引导的定语从句
（四）注意
（五）关系副词引导的定语从句
（六）判断关系代词与关系副词
（七）介词+关系词
（八）先行词和关系词二合一
（九）as,which引导的非限定性定语从句
（十）关系代词that 的用法
（十一）难点分析 （一） 限定性定语从句
（二）非限定性定语从句
（三）关系代词引导的定语从句
（四）注意
（五）关系副词引导的定语从句
（六）判断关系代词与关系副词
（七）介词+关系词
（八）先行词和关系词二合一
（九）as,which引导的非限定性定语从句 （十）关系代词that 的用法（十一）难点分析
[编辑本段]（一） 限定性定语从句
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，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 , none等不定代词时，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 还有先行词前有序数词或形容词最高级修饰时,或先行词就是序数词或最高级时.以及先行词中既有人又有物时.还有句中前面有which时,都只能用that
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
二、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 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 towels, soap, toothbrush etc。
3. 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。
4. 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,whose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。（注：who和whom已无太大区别，可以通用。）
(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.
(3) The man who/whom you met just now is my friend.
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。
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.
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.
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 color 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＝正确)
(2) This is the watch for which I am looking. (F＝错误)
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，is后应跟表语，只有the one可以，而后面的you visited a few days ago则做one的定语从句。
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 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。
一、“as / which” 特殊定语从句的先行成分
1. 形容词或形容词短语作先行成分, 具有形容词意义的介词短语也可以充当先行成分，如：
My grandmother’s house was always of great importance to me, as my own is.
在一定的语言环境里，有些名词可以具有形容词的性质。这些名词主要是那些表示人的身份、职业、状态的名词。值得一提的是，在这些具有形容词性质的名词之后，引导定语从句的关系代词不能用who / whom.
2. 动词短语先行成分
这种动词短语既可是限定形式也可是非限定形式。如果是动态动词短语，它们在从句中就一般有限定或非限定形式的替代动词do和as / which一起代替。do可以出现，也可以不出现，但不能用其它动词代替。
3. 句子作先行成分
这句子可以是整个主句也可以只是主句中的一个从句。有时是连续几个句子，有时甚至可以是一个完整的故事。
二、“as/which”特殊定语从句在句中的位置
由于先行成分的构成成分不同，“as/which”特殊定语从句在句中的位置有以下几种情况：
1. 形容词做先行成分时：形容词或形容词短语（含具有形容词性质的名词）作先行成分，“as / which”特殊定语从句置于先行成分之后。
2. 动词短语作先行成分时：动词短语作先行成分时，“as / which”特殊定语从句置于先行成分之后。但是，当从句中含有表示主观意志的插入成分时，“as”特殊定语从句可以移至句子之首。
3. 句子作先行成分时：“as”特殊定语从句的位置较灵活，可以置于先行成分之前、之中或之后。但如果先行成分是直接引语，“as”特殊定语从句多在先行成分之前。如果先行成分是否定句，“as”特殊定语从句与否定词的相对位置不同可以使它产生不同的意义。由于“as”特殊定语从句具有这一特点，所以有时它的位置不能随便移动。在非正式的文体里，“which”特殊定语从句可以出现在先行成分之中。
三、“as/which”特殊定语从句的语义功能
一般说来，as与which的语义功能相同，可以相互替换。但先行成分为句子时，它们的语义功能则有差异。
1. 表示结果
表示结果的特殊定语从句与其先行成分之间存在着一定的因果关系，从句中往往使用有结果意义的词，如动词result, make, enable, cause和形容词interesting, surprising, delightful, disgraceful等。
2. 表示评注
表示评注的特殊定语从句对其先行成分所述事实的正确性有肯定的倾向，它通常与那些表示客观事实，普遍真理或某种习性的先行成分连用；从句中则常用一些表示“合乎自然规律”、“众所周知”或“经常发生”等意义的词语，如natural, known to all, usual等。
3. 有无状语意义
“as”特殊定语从句具有状语意义（主要是方式状语意义），而“which”特殊定语从句则无状语意义。“as”特殊定语从句的状语意义要求它在语义上与其先行成分的语义保持一致，“which”特殊定语从句则不受这种限制。
四、关系代词as与which的句法功能
1. as / which 在特殊定语从句中作主语。
as作主语时，谓语动词常为连系动词（主要是be, seem），主语补语为usual、 a rule、 a matter of fact等时，系动词be习惯经常省略。行为动词作“as”特殊定语从句的谓语时一般用于被动语态（其中助动词be常略），不及物的行为动词在“as”特殊定语从句中作谓语的极少，常见的有happen一词。如：
Freddie, as might be expected, was attending the conference.
Which作主语时，谓语动词不限，主语被动皆可，只是谓语动词为被动语态时助动词be省略。
2. as和which都可以在特殊定语从句中宾语。
3. as和 which在特殊定语从句中作补语。如：
We thought him a gentleman, as/which he could never be.
“as”特殊定语从句中可以主谓倒装，“which”从句中则不能主谓倒装。
如果先行成分不是主语补语或宾语补语，关系代词用which而不用as。如：
He talked like a native, which/as he hardly was.
4. which在特殊从定语句中作定语。
which可以在特殊定语从句中作定语，修饰fact, matter, thing 等名词。这些名词代表先行成分表达的意义，有时将其略去句义仍然完整。as不能作定语。如：
I was told to go not by train but bus, which advice I followed.
[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 thier 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]（
1.定语从句：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，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。
注：关系代词有主语.宾语之分。一般whom作为宾语。
4.定语：定语用来限定、修饰名词或代词的，是对名词或代词起修饰、限定作用的词、短语或句子，汉语中常用‘……的’表示。主要由形容词担任。此外，名词，代词，数词，分词，副词，不定式以及介词短语也可以来担任，也可以由一个句子来担任．单词作定语时通常放在它所修饰的词之前，作前置定语。短语和从句作定语时则放在所修饰的词之后，作后置定语。
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，一般紧跟在它所修饰的先行词后面。
看起来很复杂 其实就是对句子中的某一部分用从句来表示
做题的时候先分析一下句子缺的成分
什么是定语从句？
I am an exchange student from the UK是什么从句?
答：1. 解答: 这句话并非主从复合句，而仅仅是一个主系表结构的简单句。所以，它并不包含任何从句。这个简单句的成分分析如下: I （主语）am（系动词） an exchange student （名词短语充当表语，核心是名词student）from the UK（介词短语充当名词student的后置定语）. 汉语译文: 我是一位来自英国的交换...
关于高中英语语法名词性从句的几个题目
答：3.连接代词 who(m), whose, which, what 等引导名词性从句时，均有各自的意义，在从句中作主语、宾语、定语等。如：That’s why she wanted to leave. 这就是她想离开的原因。When we arrive doesn't matter. 什么时候到没有关系。Tell me which one you like best. 告诉我你最喜欢哪一个...
一道英语题目
答：选择what 因为，逗号隔开的两个句子，后一句是非限制性定语从句，最好的使用which作先行词引导，代指前面的那个词或者前面的整个句子。what也可以作非限制性定语从句的先行词，题中其余的词都不能用在这种句子中。
英语小题解答,谢谢
答：6. 这里是修饰人的定语从句。修饰人一般由who/whom/whose引导，这句话中这两个儿子是the old man的，所以修饰的是the old man， 因为是接在of后面，只要有介词，都要用whom，记住，定从中介词+whom 7. 如上所说，定从修饰主语是物品的用which, 修饰主语是物品或是人的用that，跟在介词后修饰...
雅思写作6分难吗 如何提升雅思写作水平
答：另外一个重中之重就是一定要包含三大从句（定语从句，状语从句和宾语从句），长难句占到作文评分的大概30%分值左右，否则写作你写得逻辑性再好的话也是肯定5.5分以下的；除此之外，加上一些强调句，主语从句，同位语从句等等。你的句型就很具有广泛性了。 总结一下，你先想想自己的语法哪里有问题，再...
过去完成时的用法 过去完成时的用法简述
答：比如：Lily had just left when we arrived。2、表示从过去的某一时刻开始，一直延续到过去另一时间的动作或状态，常和for, since构成的时间状语连用。比如：He had lived in the house for five years .3、在含有定语从句的主从复合句中，如果叙述的是过去发生的事情，先发生的动作常用过去完成时。...
初中英语阅读课教学设计
答：能利用whose写出的简短的关于健身话题的定语从句; 能正确并恰当运用本模块生词、短语; 能围绕自己的日常生活习惯作文 演示与表达 以两人搭档的形式面向全班同学展开健身的对话。 3.情感目标 通过让学生了解不合理的饮食习惯和生活方式对健康的损害,进而在学生中间倡导健康的生活理念,同时鼓励学生坚持体育锻炼的重要性和...
常言道: “一个成功孩子的背后是一个伟大的母亲” (Behind each success...
答：【亮点说明】As the saying goes, behind each successful child is a great mother. 这句话是非限制性定语从句， Mothers dedicate almost everything we need, which is a necessary part on our road to great achievements.这句话用了定语从句， Since she is a math teacher, whenever I meet...
...提示用英语写一篇短文: 1.简述照片内容;2.谈谈你的感想
答：【亮点说明】The picture above illustrates a scene that can be seen in our life, where volunteers went to look after the old people.这里含有两个定语从句；They send them not only the things the old need but also their love to those who need care most.这里含有一个定语从句；Seeing...
来个英语强人回答我的一些英语题
答：解析：句意为“这本书解释了随着环境的变化，动植物是如何进化的。” 表达“随着”，可用as，也可用with，但是这两个词的词性不同，用法自然也不同。简述如下：1）as是从句的引导词，后面的结构应是句子，而句子的特点是有主语和谓语两个成分，特别是谓语动词，更是句子的标志性结构。句中有主语the...
