高中英语定语从句汇总讲解
◆英语谚语欣赏
1. He who knows nothing but pretends to know everything is indeed a good-for –nothing.
不懂装懂，一事无成.
2. It’s the first step that costs.千里之行，始于足下
3. He that makes himself a sheep shall be eaten by the wolf. 甘当小绵羊，迟早要喂狼.
Ⅰ. 概念：
(1) 定语从句：在主从复合句中用作定语的从句叫定语从句。定语从句一般紧接在先行词(antecedent)后面。
(2) 先行词：被定语从句修饰的成份。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，分为关系代词和关系副词。
关系词的作用：
1) 引导定语从句，连接主句和从句，相当于一个连词；
2) 必在从句中作某个句子成份（可以做主语，宾语，表语，定语，状语）
常用的关系代词: that、 which、 who、whom、whose、as 、but (文语, 置于否定词之后=that/who…not…, "没有……不……", 在从句中作主语，宾语)
常用的关系副词（在从句中只作状语）: when、why、 where
The student who answered the question was John.
I know the reason why he was so angry.
The boy (whom) you are talking to is my brother.
I'd like a room whose window looks out over the sea.
定语从句三步：
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、宾语或状语）；
第三选择合适的关系词。
Ⅱ. 几个关系代词的基本用法：
●that: 可指人或物；在定语从句中作主语，宾语，表语。(指人时，相当于who或 whom；指物时，相当于which)(一般不用于非限制性定语从句; 不可置于介词后作宾语) 如：
1. A letter that/which is written in pencil is difficult to read. (主语)
2. Do you know the gentleman that/who spoke just now
3. You can take anything ( that) you like. （宾语）
4. What is the question (that/which) they are talking about
5. Here is the man ( who/whom/that ) you want to see.
6. She's no longer the girl ( that) she used to be before.（表语）
7. Our hometown is no longer the one (that) it used to be.
= Our hometown is not the same as it used to be.
= Our hometown is different from what it used to be。
= Our hometown is not what it used to be.
●which: 指物；在定语从句中作主语，宾语，表语，定语。如：
1. The book which/that was on the desk was bought by my father.（主语）
2. The book (which/that) I bought yesterday is very interesting.（宾语）
3. The factory in which his father works is far from here.
4. He was proud, which his brother never was. （表语）
5. Tom spent four years in college, during which time he learned French.（定语）
6. He may be late, in which case we ought to wait for him.
●who, whom, whose:
who: 主格, 在从句中作主语，在口语或非正式用法中作宾语; 只可指人
whom: 宾格，在从句中作宾语; 只可指人
whose: 属格，在从句中作定语，可指人也可指物。
I like the students who/that work hard. （主语）
All who heard the story were amazed. (代词如he, they, any, those, all, one等后多用who.)
Chaplin, for whom life had once been very hard, was a success as an actor. （宾语）
He's a man from whom we should learn.
= He's a man (whom/who/that) we should learn from.
比较：He is the student whom you think to be worthy of your praise.
He is the student who you think is worth praising.
A child whose parents are dead is called an orphan.（指人）
I'd like a room whose window faces south. （指物）
=I'd like a room of which the window faces south.
=I'd like a room the window of which faces south.
There is a teapot shaped like a Chinese duck, out of whose mouth tea is supposed to come
关系代词作介词宾语:
关系代词在定语从句中用作介词宾语时, 介词可放于从句之首, 也可放于从句之末. 但以放于句首较为正式.（介词前置，必须注意不影响动词词组的含义。关系代词who 和 that 用作介词宾语时, 介词必须放在句末.）
This is the book for which you asked.
=This is the book (that/which) you asked for.
Do you know the person with whom I shook hands？= Do you know the person (whom/who/that) I shook hands with
The beginning of agriculture was a big step in human progress with which nothing could compare until our information age.
In the dark street, there wasn't a single person to whom she could turn for help.
Is this the factory to which you paid a visit last week
Is this factory the one to which you paid a visit last week
This is the girl whom they are looking after. (介词after与look构成固定词组，不可前置。look at, look for, look after, take care of等)高考英语语法专讲：定语从句
一.概念
在复合句中,修饰某一名词或代词的从句,称为定语从句,也叫形容词性从句
二.相关知识点精讲
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，在从句中作主语和宾语。例如：
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）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，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. 这是我去年呆过的山村。
I'll never forget the days when I worked together with you.我永远不会忘记与你共事的日子。
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。
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。
