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10.定语从句定从的本质是形容词，修饰其前的名词或代词。
与名从和状从最大的区别是其前有先行词。
一、定语从句在复合句中，修饰某一名词或代词从句叫定语从句，在句中起定语修饰的作用. 被定语从句修饰的词叫做先行词。
引导定语从句的词叫关系代词或关系副词。
如：Mary is a beautiful girl.Mary is a girl (who is beautiful). 定语从句先行词关系代词This is a book which was written by Tom who is my best friend.I remember the days____ I spent with you.I remember the days____ I played with you.I remember the place____ I visited last year.I remember the place____ I lived last year.I remember the reason____ I give to you.I remember the reason____ I was late.二．引导词注：这些引导词中有名词从句中的What，how，Wh—ever吗？三．引导词各自用法（Ⅰ）1．who修饰“人”作主语，口语中可作宾语。
T his is the man who often helps me.(who作主语)The man who you just talked is a teacher.2．whom修饰“人”作宾语。
可省略，但在介词后和非限制性定语从句中不可省略。
The doctor (who/whom) you are looking for is in the room.3．whose是who，which的所有格，作定语，修饰“人”“物”。
This is a book whose cover is blue.4.that修饰“人”“物”作主语、宾语、表语。
完整版)高中英语定语从句讲解及练习定语从句是高中英语的重点知识，也是高考常考点。
本文将主要讲解关系代词引导的定语从句，并解释关系副词引导的定语从句，包括判断关系代词与关系副词限制性和非限制性定语从句等内容，并提供例题讲解。
定语从句在句中作定语，修饰一个名词或代词，被修饰的名词词组或代词即先行词。
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。
它们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。
当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。
例如，当先行词是人时，可以使用who或whom作为关系代词。
如：Is he the man who/that wants to see you?（他就是你想见的人吗？）关系代词在从句中作主语。
而当先行词是物时，可以使用which或that作为关系代词。
如：The package（which / that）you are carrying is about to come unwrapped.（你拿的包快散了。
）关系代词在从句中作宾语。
除了who。
whom。
whose。
that。
which，还有关系副词when。
where。
why等。
关系副词引导的定语从句也可以修饰一个名词或代词。
例如：I still remember the day when we met.（我仍然记得我们相遇的那一天。
）关系副词when在从句中作时间状语，修饰先行词day。
总之，掌握定语从句的用法和关系词的选择是英语研究的重要内容。
通过不断的练和实践，相信大家可以掌握这一技能。
关系副词可以代替时间、地点或理由的名词，在从句中作状语。
例如，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。
比如，有时候我们必须屈服，这是任何人都会遇到的情况（There are ns when [on which] one must yield）。
高考英语语法定语从句 attributive clause◆概念(1) 定语从句：在主从复合句中用作定语(修饰某一名词或代词)的从句叫定语从句，一般紧接在先行词(antecedent)后面。
(2) 先行词：被__________修饰的成份。
先行词可以为一个词，短语，或整个主句。
(3)引导定语从句的词叫关系词 关系代词____, ______, ______, ______, _____, _______关系副词 _____, ______, ______ 在从句中作某个句子成份（可以做主语，宾语，定语，状语）第一找出先行词；第二看先行词在定语从句中的语法功能（做主语、宾语、定语或状语）； 第三选择合适的关系词。
考点一：关系代词引导的定语从句1.who ,whom 和whose 引导的定语从句(1)who或whom均可指代人，但who在从句中作主语或宾语，做宾语时不可以出现在介词后；whom在从句中作宾语；两者在引导限制性定语从句时可用that 替换。
作主语时，who/that不可省略；作宾语时，whom/who/that可以省略。
◆ I’ve become good friends with several of the students in my school _________I met in the English speech contest last year.◆ I have many friends to _________ I’m going to send post cards.◆ The person I want to talk about with is Tu Youyou, the one ______ won theNobel Prize in Physiology or Medicine in 2015.(2)whose表所属关系，一般指人，也可指物，在从句中作定语。
定语从句与高考定语从句是高考的热点，主要考查关系代词和关系副词的正确运用，特别是它们在非限制性定语从句中的运用。
主要考点有：1.关系代词who, which, that, whom, as, whose的基本用法。
2.关系副词when, where, why的基本用法。
3.定语从句中关系词的特殊用法。
4.定语从句中“介词＋关系代词”介词的确定。
5. which/ as引导的非限制性定语从句的区别。
一、定语从句的分类限制性定语从句定语从句非限制性定语从句二、限制性定语从句和非限制性定语从句的区别区别一：形式不同限定性定语从句主句和从句之间不用逗号隔开；而非限定性定语从句与主句之间通常____用___逗号隔开。
区别二：功能不同限定性定语从句用于对先行词的意义进行修饰、限制和识别，如果去掉，就会造成句意____不明确___；而非限定性定语从句用于对先行词起补充说明作用，如果省略，句意不影响。
如：People who take physical exercise live longer. 进行体育锻炼的人活得长些。
(若把从句去掉句子就失去意义)His daughter, who is in Boston now, is coming home next week. 他女儿现在在波士顿，下星期回来。
(若把从句去句子意义仍然完整)比较下面的两个句子：I have a sister who is a doctor. 我有一个当医生的姐姐。
(姐姐不止一个)I have a sister, who is a doctor. 我有一个姐姐，她是当医生的。
(只有一个姐姐)区别三：翻译不同在翻译定语从句时，一般把限定性定语从句翻译在它所修饰的先行词之前，而把非限定性定语从句与主句分开。
如：He is the man whose car was stolen. 他就是汽车被窃的那个人。
I’ve invited Jim, who lives in the next flat. 我邀请了吉姆，他就住在隔壁。
高中定语从句讲解与练习（附答案）定语从句专项讲解与练习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：关系代词和关系副词。
它们起连词作用，本身做从句的主语、宾语、表语或定语，本身在从句中作时间、地点或原因状语。
主要有who, whom, that, whose, which, as, when, where, why。
PS:what不能引导定语从句. 指人的关系代词有who、whose、whom、that. 指物的关系代词有which、whose(=of which)、that.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.）I like the books which / that were written by Lu Xun.The desks (which/that) we made last year were very good.This is the house in which we lived last year. (= This is the house which /that we lived in last year.)I live in the room whose windows face south. (= I live in the room ,the windows of which face south.)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 , these 时，关系代词用who。
（英语）必备英语定语从句技巧全解及练习题(含答案)含解析一、定语从句1．The Palace Museum is the best place I’ve ever visited.A．who B．that C．where D．what【答案】B【解析】试题分析：句意：故宫博物院是我曾经参观过最好的地方。
which， that引导的从句，它们所代替的先行词是事物的名词或代词，先行词前有序数词或被形容词最高级修饰时，用that而不用which。
本句中先行词是the best place，此先行词为下文定语从句的逻辑宾语，指物，先行词前有最高级修饰，故用that引导此句的定语从句。
选B。
考点：考查定语从句。
2．---How do you like the Sun Island？Is it worth visiting?---Sure. It’s one of the best places I have ever been to.A．which B．that C．who【答案】B【解析】【详解】句意：----你觉得太阳岛怎么样？值得一游吗？----当然。
这是我去过的最好的地方之一。
考查定语从句引导词。
本句先行词places是物，引导词在定语从句中作宾语，可知用that或which引导此定语从句，但先行词有最高级修饰时，只能用that引导此定语从句。
故选B。
【点睛】定语从句是用作定语的从句。
被定语从句所修饰的名词或代词叫先行词。
定语从句紧跟先行词（名词或代词）之后。
引导定语从句的词叫引导词，引导词分为关系代词（that/who/whom/which/whose）和关系副词（when/where/why）。
引导词连接先行词和定语从句，在定语从句中充当一定的成分（关系代词充当主语或宾语，关系副词充当状语）。
先行词是物时，用that或which引导定语从句；当先行词是人时，用who或that引导定语从句。
（一）、当先行词是物时，只用that的情况：1.当先行词被序数词或形容词的最高级修饰时。
高中定语从句精讲与练习及答案定语从句1什么是定语从句？由一个完整的句子充当定语的从句为定语从句。
2特点：和其它类从句比较，除了有引导词（关系词）定语从句有“先行词”。
3什么是先行词：被定语从句修饰的名词/代词为先行词。
4定语从句的种类：限定性定语从句和非限定性定语从句。
5定语从句引导词（关系词）的种类：关系代词和关系副词。
例：I work in a school which was built 50 years ago.在此句中”school”为先行词，which 来引导定语从句，“which was built 50 years ago.”整句话来修饰先行词做定语，所以这是个定语从句。
注：定语从句的引导词通常置于先行词之后引导定语从句。
（一）代词性引导词和副词性引导词，即关系代词和关系副词。
代词性引导词有：that,which,who,whom,whose,as等，副词性引导词有：when,where,why等，代词性引导词在定语从句中充当主语/宾语，副词性引导词在定语从句中充当状语。
注：what 不能引导定语从句，因为what从句属于名词性从句。
（二）基本用法。
1．先行词性质不同要使用不同的引导词，先行词指人时，可用that,who,whom代指，who与whom的区别在于who是主格，在从句中作主语，whom是宾格，在从句中作宾语，而that作主语/宾语均可。
先行词指物时，用that/which代指，可见，that既可代指人的先行词，也可代指物的先行词。
例：Do you know the man that is standing by the door?此句that 引导定语从句，代指先行词the man.例：This is the book that I have been looking for .此句that引导定语从句，代指先行词the book.例：This is the book which I have been looking for.此句which引导定语从句，代指先行词the book.例：Do you know the man who is standing by the door?此句who 引导定语从句，代指行行词the man,作从句的主语。
高中英语语法基础——定语从句知识点归纳讲解（附同步练习）★先行词：被定语从句修饰的名词或代词叫先行词。
通常情况下，引导词前面的名词即为从句的先行词。
★关系词：引导定语从句的词叫关系词。
也可以称作引导词。
①关系代词：who，whom，which，that，whose，as，在从句内作主语、宾语等名词性成分。
②关系副词：when，where，why在从句内作状语。
（一）. 使用who、whom、which、that的定语从句1. whoThis is the boy who plays basketball very well.This is the teacher who is teaching us English.▲who 指人, 在从句中作主语。
2. whomThis is the boy (whom) I often help.The man is our headmaster (whom) you met just now.I met the girl (whom) you often praise.▲whom 指人,在从句中作宾语, 可省略。
3. whichThis is the farm which keeps many cows.This is the farm (which ) I visit every year.▲which 指事物, 在从句中作主语或宾语,作宾语时可省略。
4. that以上三种情况均可用that。
指人或指物，可作主语和宾语，作宾语时可省略。
（二）. 使用whose的定语从句Do you know the girl whose father is mayor.I used to work in an office whose window faces north.I work in a school whose students are excellent.▲whose 指人或物的所属关系，表示“某人的”或“某物的”。
高中英语语法基础——定语从句知识点归纳讲解（附同步练习）★先行词：被定语从句修饰的名词或代词叫先行词。
通常情况下，引导词前面的名词即为从句的先行词。
★关系词：引导定语从句的词叫关系词。
也可以称作引导词。
①关系代词：who，whom，which，that，whose，as，在从句内作主语、宾语等名词性成分。
②关系副词：when，where，why在从句内作状语。
（一）. 使用who、whom、which、that的定语从句1. whoThis is the boy who plays basketball very well.This is the teacher who is teaching us English.▲who 指人, 在从句中作主语。
2. whomThis is the boy (whom) I often help.The man is our headmaster (whom) you met just now.I met the girl (whom) you often praise.▲whom 指人,在从句中作宾语, 可省略。
3. whichThis is the farm which keeps many cows.This is the farm (which ) I visit every year.▲which 指事物, 在从句中作主语或宾语,作宾语时可省略。
4. that以上三种情况均可用that。
指人或指物，可作主语和宾语，作宾语时可省略。
（二）. 使用whose的定语从句Do you know the girl whose father is mayor.I used to work in an office whose window faces north.I work in a school whose students are excellent.▲whose 指人或物的所属关系，表示“某人的”或“某物的”。
高中定语从句讲解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，一般跟在它所修饰的先行词后面。
在复合句中，修饰某一名词或代词叫做定语从句。
先行词被定语从句修饰的名词、代词称为先行词。
关系代词引导的定语从句举例关系代词所代替的先行词是人或物的名词或代词，并在从句中充当主语、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。
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，绝对没有what；关系副词有where, when, why等。
关系词常有3个作用：①连接作用，引导定语从句。
②代替主句中的先行词，甚至可能是主句中的一部分或者整个主句。
③在定语从句中充当一句子成分。
注：关系代词有主语、宾语之分。
一般whom作为宾语。
关系代词在从句中作主语，宾语，表语，定语等，关系副词在从句中作地点状语，时间状语，原因状语等。
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（动词不定式短语、动名词短语和分词短语）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。
Whose 用来指人或物(只用作定语, 若指物，它还可以同of which互换，指人的时候也可以用of whom 代替）(1) 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。
(2) Please pass me the book whose (of which) color is green.请递给我那本绿皮的书。
定语从句一、定语从句中只能用that 引导的情况1．当先行词为all, much, little, something, everything, anything, nothing, none, few, the one 等词时。
Everything that he said was true.2.当先行词被the very（恰恰，正好）, the only，any，few，little，no，all修饰时。
This is the very grammar book (that) I want to buy.The only thing that is constant is change.There was little that we could do to help her.3．当先行词是形容词最高级或被形容词最高级修饰时。
This is the best that has been used against pollution.This is the most interesting film that I've ever seen.4. 当先行词是序数词或被序数词修饰时。
The first place that they visited in London was the Big Ben.What is the first American film that you have seen?5．当主句的主语是疑问词who或which时。
Who that has common sense will believe such nonsense?Which is the T-shirt that fits me most?6．当先行词既有人又有物时。
Do you know the things and persons that they are talking about?7．先行词在定语从句中做表语,而关系代词在从句中也做表语时。
She is no longer the sweet girl (that) she used to be.He is not the man (that) he seems.二、定语从句中只能用which引导的情况①当关系代词的前面有介词时.A zoo is a park in which many kinds of animals are kept for exhibition.Is this the room in which Mr. White lives?②在非限制性定语从句中.Crusoe's dog, which was are now very old, became ill and died .More and more people are beginning to learn English, which is becoming very popular in our country.③在一个句子中有两个定语从句，其中一个定语从句的关系代词用了that, 另一个宜用which .Let me show you the novel，that I borrowed from the library which was newly open to us.④当关系代词后面带有插入语时.Here's the English grammar which, as I have told you, will help improve your English.⑤先行词本身是that, 宜用which .What's that which she is looking at?三、定语从句中只能用who引导的情况在定语从句中who和that指代人时常可以通用，但在下列情况中只能用who,而不能用that。
(1)先行词是one, ones和anyone时，宜用who。
One who has nothing to fear for oneself dares to tell the truth.The ones who flatter me don’t please me.Anyone who fails to finish the task given should be criticized.(2)先行词是those时，宜用who。
No words are strong enough to express our thanks to those who worked hard to rescue survivors in the earthquake.(3)当先行词有较长的后置定语时，宜用who。
I met a girl in the street yesterday who grew up in western Yunnan province.(4)一个句子带有两个定语从句时，其中一个定语从句的关系代词是that, 另一个宜用who。
The boy that you met last night is the group leader who studies very hard.(5)在there be 开头的句子中，宜用who。
There is a young man who wants to see your father.There are many old men who are against this plan.练习填空1. Here are the most important ones _____33_____ are often mentioned by successful salespeople.2. He talked a lot about things and persons _______they remembered in the school.3. This is one of the best films _______ have been shown this year.4. I'm interested in all ______you have said.5. Who is the man ______ is making a speech?6. Anyone who laughs last laughs best.That, that, that, that, that选择1. Who _____ has common sense（常识）will do such a thing？A. whichB. whoC. whomD. that2. All the apples _____ fell down were eaten by the pigs.A. thatB. thoseC. whichD. what3. They asked him to tell them everything _____ he saw at the front.A. whatB. thatC. whichD. where4. I’ll tell you _____ he told me last night.A. all whichB. all whatC. that allD. all翻译：1. 我已完成了他让我做的一切。
2. 他解答出我所见过最难的题目。
3. 我需要同你一样的字典。
4. 他给我们讲了许多我们从来没有听说过的有趣的人和事。
5. 我必须记住老师教给我的一切知识。
I have done all that he told us to do.He worked out the most difficult problem that I had seen.I need the same dictionary that you have.He told us many interesting things and persons that we had never heard.I had to remember everything that the teacher taught me.Who is the man that you spoke to just now?四、“介词+关系代词”引导的定语从句关系代词在从句中作介词宾语时，可以跟介词一起放在从句与主句之间（that, who不可以），也可以把介词放在从句中有关动词的后面，使关系代词紧跟它所修饰的先行词。
A The school (which/that) he once studied in is very famous.The school in which he once studied is very famous.B Tomorrow I’ll bring here the magazine (which/that) you asked for.Tomorrow I’ll bring here the magazine for which you asked.C This is the boy (whom/who/that) I played tennis with yesterday.This is the boy with whom I played tennis with yesterday.D The manager whose company I work in pays much attention to improving our working conditions.The manager in whose company I work pays much attention to improving our working conditions.注意：1. 含有介词的短语动词一般不拆开，介词仍放在短语动词的后面。
如：look for, look after, take care of 等。
This is the watch (which/that) I am looking for. (正)This is the watch for which I am looking. (误)The babies (whom/who/that) the nurse is looking after are very healthy. (正)The babies after whom the nurse is looking are very healthy. （误）2. 介词后的关系代词不可用that和who，若介词放在关系代词前，关系代词指人时只可用whom指物时只可用which；关系代词是所有格时用whose。
