which定语从句

which 引导的定语从句
in which 引导的定语从句
和as引导的定语从句
还有if引导的定语从句
不是很清楚能详细讲一下吗??

谢谢了

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.;

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.

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

参考资料:http://baike.baidu.com/view/56536.html?wtp=tt

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第1个回答  2008-11-02
定语从句中where=in which/at which/on which等

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常与从句中的know,see, hear,expect等动词连用,也常用于as often happens,as is often the case(常有的事)等句子中;而which一般不用于以上情况。

as有“正如”的含义,which没有此含义。
if 不能引导定语从句。它能引导状语从句和宾语从句。
第2个回答  2008-11-02
定语从句中关系副词(when \why\where等)=介词+which

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常与从句中的know,see, hear,expect等动词连用,还有用于the same as , such as 等句型中,也常用于as often happens,as is often the case(常有的事)等句子中;而which一般不用于以上情况。

as有“正如”的含义,which没有此含义。
if 不能引导定语从句。它能引导状语从句和宾语从句。

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