定语从句

1.定语从句：修饰一个名词或代词的从句称定语从句，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成为关系词
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。

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.
4. that指人时，相当于who或者whom；指物时，相当于which。在宾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?

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 who/that you talked with 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.

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.

限制性定语从句、非限制性定语从句
形式上不用逗号和主句隔开用逗号和主句隔开
意义上是先行词不可缺少的定语，不能删除是对先行词的补充说明，删除后意思仍完整
译法上翻译成先行词的定语，“…的…”通常翻译成主句的并列句
关系词的使用上A．做宾语时可省略 B。可用that
C．可用who代替whom A．不可省 B。不用that
C。不用who代替whom

限制性定语从句举例：
(1) The teacher told me that Tom was the only person that I could depend on.
(2) China is a country which has a long history.
非限制性定语从句举例：
(1) His mother, who loves him very much, is strict with him.
(2) China, which was founded in 1949, is becoming more and more powerful.

<1>关系代词在定语从句中作表语，不管是人或物只能用that。
He is not the man that he was when I first saw him.【他现在不是我第一次见他时那样的。】


<2>当先行词被all,something,anything,nothing,everything,little,much,the one,none等时，引导定语从句多用关系代词that。
The goverment has promised to do all that lies in its power to alleviate the hardships of people.【政府承诺尽其一切力量减轻人民的苦难。】


<3>当先行词即指物又指人时，多用that引导定语从句。
Look at the girl and the dog that are crossing the street.【瞧正在过马路的那个女孩和那只狗。】


<4>当先行词被形容词的最高级修饰时引导定语从句的关系代词只能用that，而不能用which。
This is the most interesting book that I've ever read.【这是我所读过的最有趣的书。】


<5>当先行词被the only, the very, the first,the last,few,little,no,all,one of,the same等修饰时，须用关系代词that来引导。
The only thing that we can do is to give you some money.【我们唯一能够做的就是给你一些钱。】


<6>当主句中已有疑问词who或which时，要用关系代词that。
Which is the bike that you lost?【你丢失的自行车是哪辆？】


<7>在介词后面的关系代词用which而不能用that。即“介词+which（代物）”
The picture for which he paid $1,000 was once owned by a duke.【他花了1000美元买下的画曾为一名公爵所拥有。】


<8>在非限定性定语从句中不能用that。
Crusoe's dog, which was very old now, became ill and died.【克鲁索的狗，现在已经很老了，病死了。】

<9>有两个定语从句，其中一个关系代词已有which,另一个宜用that。相反，如果其中一个为that，另一个宜用which。
Edison built up a factory which produced things that had never been seen before.【爱迪生办了一个工厂，生产过去从未见过的东西。】
Let me show you the novel that I borrowed from the library which was newly open to us.【让我给你看看我从新开放的图书馆借来的小说。】


共同点：
<10>当定语从句所修饰的先行词为物时，关系代词可用which或that。
In fact the Swede did not understand the three questions that/which were asked in French.【事实上Swede并不理解三个被提问到的英语问题。】