as在定语从句中的用法
as在定语从句中是关系代词，可做句子成分。但在上述两个句子中，as只是在引导定语从句而已，不作句子成分。
as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which 引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思
(1) As is known to all, China is a developing country.
(2) He is from the south, as we can see from his accent.
(3) John, as you know, is a famous writer.
(4) He has been to Paris more than several times, which I don’t believe.
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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
as定语从句的用法及定语从句的主谓一致
整理者：尹广兴
一：as可以代替整个句子或一件事，引导非限制性定语从句，在从句中作主语、宾语或表语，意为“正如……，就像……，据……”；从句位置可置于主句之前或之后，有时也可作为插入语置于句中，一般用逗号和主句隔开。
as的这种用法常见于以下这些结构:as we can see, as can be seen, as we know, as is（well）known, as may be imagined, as often happens, as has been said before, as was mentioned above, as is often the case, as/indeed it is…
例:As is well known，great changes have taken place in China. 或Great changes, as is well known, have taken place in China.众所周知，中国发生了巨大的变化。( as在定语从句中作主语。)
This experiment is very simple，as indeed it is.实验非常简单，事实上也确实如此。(as在定语从句中作表语。)
注意：①which在引导非限制性定语从句时，也有和as一样的功能，可以代替整个句子，但which只能用在主句之后。
②在as所引导的非限制性定语从句中，如果运用的是被动语态结构，be动词可以省略；但which没有此用法，be动词不可省。例如:She married him，which was unexpected.＝She married him as（was）unexpected.她嫁给了她，这一点大家都没有料到。（作主语，代替前面的句子；用which时was不可省。）
二as除了代替整个句子，也可以代替主句中一个特定的词。as在它引导的定语从句（限制性或非限制性）中可以充当主语，宾语和表语；在这种用法中它经常和such, so, the same等词搭配使用；且当先行词中有such, so, the same等词修饰时，关系代词通常必须用as。
例如:1. They were satisfied with this decision，as was agreed beforehand.他们对这个决定都满意，这事先已经经过他们同意了。( as在定语从句中作主语，其先行词是this decision)
2. I never heard such stories as he tells.我从未听过他讲的这类故事。( as在定语从句中作宾语，先行词是such stories.)
3.The place doesn't look the same as it was before liberation.这个地方看上一去和解放前大不一样了。( as在定语从句中作表语，先行词是same)
4.Have you bought the same book as I referred to yesterday?你有没有买我昨天说的那本书啊？( as在定语从句中作宾语，先行词是book)
注意:先行词中有the same修饰时，定语从句也可用that引导，但意思上有区别，as表示与
此同类；that表示就是那一个，同物。
as ，which 引导定语从句的辨析与练习2010/04/19 15:48 as 与which都可以引导一个没有先行词的定语从句，as和which用来代替整个主句或主句中的一个短语。
它们的区别是：
as 引导的从句可以放在主句的前、中、后。对主句起补充说明的作用，解释主句的依据，强调主句确定性等，译为：“正如；由...而知”。从句动词多表示消息来源，如：see，know，expect。结构形式多为：as we know 或as is known。
which 引导的从句一般都放在主句的后面。说明主句产生的结果，或对主句的内容作出判断，译为：“这...”= and th is or but this。从句动词多表示使让、或结果，如：make，break。结构形式多为：which makes me sad或which is a plan。
以上内容列表如下：
项目as which
相同点没有先行词，代替整个主句或主句中的一个短语。
区别
位置在主句的前、中、后。在主句的后面。
语境补充说明依据，证明主句的确定性。主句产生的结果，对主句作出判断。
翻译正如；由...而知这= and this/ but this
动词see,know，expect，imagine，believe make,cause,encourage,break,reach
结构as we know ; as is supposed which made us sad; which is sad.
1. He said that he was invited, ______ was a lie.
2. _____ can see from the letter he wrote, she is a talented journalist.
3. _____ was expected, he performed the task successfuly.
4. Where there is smoke, there is fire, ______ you know.
5. He said that he lost the book, ________ was untrue.
6. It was raining hard, ______ kept us indoors.
7. Harry is unusaually tall, _______ are his brothers.
8. ________ all his friends agree, he was unusually warm-hearted, loving and generous.
9. They rely on themselves, _______ is much better.
10. Whenever I met him, _______ was fairly often, I like his sweet and hopeful smile.
11. He invited us to dinner, _____ was very kind of him.
12. I am _______ you can imagine short enogh of money.
13. He changed his mind, ______ made me angry.
14. Rats ran about the attic(阁楼) all night, _______ kept her awake.
15. There is great disorder, ______ the newspaper will have told you.
16. He has to work on Sundays, _______ he doesn`t like.
17.Shelley,_______ we had seen, had met her through his uncle.
18. Jack drove too fast , ______ was reckless(不计后果的).
19.Anyway, that evening, ________ I`ll tell you more about later, I survived the traffic accident.
A. when
B. where
C. what
D. which
Keys: 1 which 2 As 3 As 4 as 5 which 6. which 7as 8 As 9 which 10 which 11 which 12 as 13 which 14 which 15 as 16 which 17 as 18 which 19D
例如:Have you brought the same book that I gave you yesterday?
你有没有把我昨天给你的那本书带来啊？( that在定语从句中作宾语，先行词是book。体会：本句中所指的书是同一本，上句中指的是同一类书，而并不就是那一本。)
介词+关系词怎么用？介词加关系词分别等于什么？
答：一、“介词＋关系代词”的用法
当关系代词在定语从句中作介词宾语时，我们通常用“介词＋关系代词”引导定语从句。如果
指“人”，用“介词＋whom”；如果指“物”，用“介词＋which”。例如：
Do you know the lady with whom our manager is talking in the office?
Where is the supermarket in which you bought the laptop last week?
●使用“介词＋关系代词”要注意以下几点：
(一)选用介词的依据：
(1) 根据定语从句中谓语动词的搭配习惯(即固定短语)。例如：
Yesterday we visited the West Lake for which Hangzhou is famous.
(2) 根据先行词的搭配习惯(约定俗成，不一定是短语)。例如：
The old woman with whom you talked just now is a famous artist.
(3) 根据句子的意思来选择。例如：
The naughty boy made a hole in the wall through which he could see what is happening outside.
(4) 表示“所有”关系或“整体中的一部分”时，通常用介词of。例如：
I have about 20 books, half of which were written by Bing Xin, the famous writer.
(二)在定语从句中，含介词的短语动词不可拆开使用(短语拆开后含义发生变化)，如look after, look for等。例如：
The babies whom the nurses are looking after are very healthy.(正)
The babies after whom the nurses are looking are very healthy.(误)
(三)“of which / whom”有时可以用“whose＋名词”结构来改写。例如：
The building whose roof was damaged in the earthquake has been repaired.
＝The building of which the roof was damaged in the earthquake has been repaired.
(四)当先行词为way并且定语从句中缺少状语时，通常用in which或that引导定语从句(in which或that可省略)；如果定语从句中不缺少状语，则用关系代词引导(that 或which 可省略)。例如：
All of us disliked the way(in which / that)Tom settled the maths problem.
I don’t understand the way(that/which)the teacher explained to me.
(五)in that不可以引导定语从句，但可以引导原因状语从句。例如：
She didn’t attend the meeting in that / because she was seriously ill.
二、“介词＋关系代词”与关系副词的转化
(1)当先行词表示地点，定语从句中缺少地点状语时，通常用关系副词where引导，此时也可选用表示地点的介词＋which来代替关系副词where。例如：
I visited the village where many children couldn’t go to school because of poverty.
＝I visited the village in which many children couldn’t go to school because of poverty.
(2) 当先行词表示时间，定语从句中缺少时间状语时，通常用关系副词when引导，此时也可选用表示时间的介词＋which来代替关系副词when。例如：
We’d better fix a date when we will practice speaking English next week.
＝We’d better fix a d ate on which we will practice speaking English next week.
(3) 当先行词为reason，定语从句中缺少表示原因状语时，通常用关系副词why引导，此时也可以用for which来代替关系副词why。例如：
Can you tell me the reason why you were late for school?
＝Can you tell me the reason for which you were late for school?
介词+关系代词”引导的定语从句
由“介词+关系代词”引导的定语从句主要用于正式文体中，这儿的关系代词主要是which和whom，介词的选用要根据句意或一些固定搭配来确定。
“介词+关系代词”(关系代词一般指的是which/whom)引导的定语从句，有以下几种情况:
1.“介词+which”在定语从句中作时间､地点､原因状语，相当于关系副词。如:
(1)This is the reason for which(=why) he left the company.
这就是他离开公司的原因。
(2)He will never forget the day on which (=when) he went there.
他永远忘不了去那儿的那一天。
(3)Is this company the one in which (=where) you worked half a year ago?这就是半年前你在那儿工作的公司吗?
2.“介词+which/whom”在定语从句中作目的､方式状语。如:
(1)Can you tell me for whom you are working?
你能告诉我你现在为谁工作吗?
(2)There is a big hole on the wall through which he can see what’s happening inside.
墙上有一个大洞，通过这个洞他能看到里面所发生的一切。
(3)The train by which he is travelling is arriving.
他乘坐的那辆火车就要到了。
(4)In the dark street，there wasn’t a single person to whom she could turn for help.在漆黑的街上，没有一个人她可以求助。
3.“不定代词､数词或名词+of which/whom”在定语从句中充当主语。如:
(1)There are sixty students in our class，all of whom are working hard.
班上有60 名学生，他们都在努力学习。
(2)He paid the boy ten yuan for cleaning the windows，most of
which hadn’t been cleaned for at least a year.
他给了那个男孩十元钱擦那些至少一年未擦的窗户。
4.“形容词最高级+介词+关系代词”在定语从句中充当主语。如:
(1)There are sixty students in the class，the tallest of whom is Li Ming. 班上有六十名学生，其中最高的是李明。
(2)There are seven continents in the world，the largest of which is
Asia. 全球有七大洲，最大的是亚洲。
5.“the+n.+of+which”引导的定语从句，相当于whose引导的定语从句。如:
(1)We took a photo of a rocket，the length of which was about 30
meters.=We took a photo of a rocket，whose length was about 30
meters. 我们给火箭拍了照，火箭大约长30米。
(2)Recently I bought an ancient Chinese vase，the price of which
was very reasonable.=Recently I bought an ancient Chinese vase，
whose price was very reasonable.
最近我买了一个中国古代花瓶，价格非常合理。
6.“介词+whose”修饰后面的名词。如:
He is the very man in whose pocket I found my lost money.
他就是那个我在他的口袋里找出我丢掉的钱的人。
7.“介词+which+不定式”此结构相当于一个简化了的定语从句。如:
(1)He found something about which to write(=he could write).
他发现有些事是可以写的。
(2)The poor man has no house in which to live.=The poor man has no house in which he can
live. 这个穷人没有房子住。
8.介词的选用要根据句意或一些固定搭配决定。其中的介词可以是in，on，about，from，for，with，at，of，without，to。如:
(1)Galilia built a telescope through which he could study the sky.
伽利略建起了望远镜，通过望远镜他可以研究天空。
(2)The cloth of which this coat is made is produced in Shanghai.
这件外套的布料是由上海制造的。
(3)He wrote many articles in which he expressed his love for
his motherland.
他写了许多文章，在文章中他表达了对祖国的热爱。
但有些含介词的短语动词一般不能拆开，介词仍放在动词的后面。
如:listen to，depend on，take care of，pay attention to，look at等。
This is the boy whom she has taken care of.
这就是那个她照顾的非常好的男孩。
That is a problem we should pay close attention to.
这是一个我们应该密切关注的问题。
强调句与定语从句的区别是：在定语从句中一般使用关系代词that, which，who, whom或关系副词when, where，why等,先行词(中心词)一般是名词或名词短语，而在强调句中，可以用副词、介词短语或从句来作被强调的内容。；而在强调句中则主要使用that，who；
有时强调句在形式上和定语从句、状语从句很相似。我们除了从意思上进行区分外，还能根据强调句的结构特点来进行判断，如能去掉It was...that...后，句子仍然通顺，就是强调句。这一点很重要.
试比较：
①It is a question that needs careful consideration.
②It is novels that Miss Williams enjoys reading.
简析：句①是含有定语从句的句子，在此It是指示代词，It is a question是个"主语+系动词+表语"结构，如果去掉It is...that,句子结构就不完整了。句②是强调句，在此It是个引导词，没有具体含义，如果去掉It is...that，把语序稍加调整，句子结构仍然是完整的。
区分定语从句与强调句区分定语从句和强调句可用还原法，因为强调句的基本句式为It is (was)+被强调部分+that+句子的其余部分，因此只需将it is(was) 后面的部分还原到原来的句子中，如果成份完整，则为强调句，如果成份不完整则为定语从句。
1) It is this street _______I happened to meet him.
It is in this street _______I happened to meet him.
A．that
B．where
C．which
D．from which 首先，我们看到主句部分为it is…结构，可能是定语从句可能是强调句，
利用还原法，将两部分分别还原，得出1．I happened to meet him this street. 2．I happened to meet him in this street. 1句子成份不完整，为定语从句，用where；2句子成份完整为强调句，选that。
2) Where did you meet him?
It is in the cinema_______ I met him.
It is in the cinema_______ door faces west.
A．that
B．where
C．whose
D．which 仍然采取还原法，得出1．I met him in the cinema. 2．Door faces west in the cinema. 1句子成份完整，确定为强调句，用that选A；2明显不是一个意思表达清楚的句子，其实本句是一个省略句，全句为：It is in the cinema _______door faces west that I met him. 强调句部分已经省略，而句中door faces west 是一个定语从句，表示门朝西开的电影院，因此选C，whose 在做题中我们经常可以看见带有定语从句的强调句，这时仍可用还原法加以辨别：(1) Was it in the cinema _______Smith met you _______you saw the film? A．that, that B．whom, then C．where, that D．which, where (C) (2) Where did you found XingMing? It was in the office _______he worked. A．this B．which
在定语从句中one of 后的先行词若是可数名词的复数，谓语动词就用复数形式，the only one of 后的谓语动词用的是单数形式。
e.g. Tom is one of the boy students in our class who are often late.
Tom is the only one of the boy students in our class who is often late.
5. 代词/名词＋定语从句，从句谓语动词的单复数与所修饰的词一致。
I , who am wrong, should apologize to him. 我错了，应该向他道歉。
She came across a former classmate who is very wealthy.
注意：在“ one of +复数名词＋定语从句”，定语从句一般看作修饰复数名词，从句中的谓语动词用复数；在“the only one of＋复数名词＋定语从句”结构中，定语从句应视为修饰单数名词，从句谓语动词用单数。
This is one of those cars that were damaged in the accident.
这是事故中被损坏的车中之一。
She is the only one of the girls who is interested in literature.
她是这些人中唯一喜欢文学的女孩。
as引导定语从句的用法
as引导定语从句的用法 as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which 引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思 (1) As is known to all, China is a developing country. (2) He is from the south, as we can see from his accent. (3) John, as you know, is a famous writer. (4) He has been to Paris more than several times, which I don’t believe. ================================ 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 a lways 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。
as在定语从句中的用法
关系代词as 引导的定语从句 1、as 可以在定语从句中做主语或宾语，代表前面整个句子。如： He married her, as was natural. 他跟她结婚了，这是很自然的事。 He is honest, as we can see. 他很诚实，这一点我们看得出来。 2、as 引导的非限制性定语从句可以放在主句之前、主句之后，甚至还可以分割主句。另外，as 常 常有“正如、正像”的含义。如： As is known to all, China is a developing country. 众所周知，中国是发展中国家。 He is from the south, as we can know from his accent. 他是南方人，从他的口音我们就可以知道。 John, as you know, is a famous writer. 正如你所知，约翰是个著名作家。 3、当先行词受such, the same 修饰时，关系词常用as。如： I’ve never heard such stories as he tells. 我从未听过象他讲的这样的故事。 He is not such a fool as he looks. 他可不象他看上去的那样傻。 This is the same dictionary as I lost last week. 这部词典跟我上星期丢失的一样。 注意： 当先行词受the same 修饰时，偶尔也用 that引导定语从句，但与as引导的定语从句意思有区别。如：She wore the same dress that she wore at Mary's wedding. 她穿着她在玛丽婚礼上穿过的那个同一条连衣裙。 She wore the same dress as her younger sister wore. 她穿就像着跟她妹妹所穿的一样的连衣裙。
as在定语从句中的用法
一.as在定语从句中做关系代词,在从句中充当主语,宾语,或表语,as 做表语习惯省略be动词. as在限制性定语从句中 1.such+名词+as从句 such用来修饰名词 I don't like such a man as talks big.我不喜欢吹牛的人. Such house as she could find was expensive .凡是他能找到的房子都很贵. 注意区别下面两句话 This is such an interesting book as everyone likes.定语从句 as 做宾语这是一本每个人都喜欢的书. This is such an interesting book that everyone likes it. 结果状语从句这是一本有趣的书以至于每个人都喜欢.(such 修饰名词,so修饰形容词或副词) such+名词+as 表列举 I like such animals as dogs ,cats. such +n+as to do sth I am not such a fool to believe her .
such as to do sth Met with disappointments such as to drive me mad . 2.such as从句 such是代词在主句中充当主语,宾语,表语 Such as you see is our house. such as 表列举 I know three languages, such as Chinese,English. such+n+as to =such+n+(that)从句 as such 意思是"本身" Money as such will seldom bring happiness. the same +名词 +as从句 I have the same book as he is reading. 定语从句 as做宾语我有一本和他正在读的一样的一本书.(两本书) I have the same book that he is reading. 定语从句 that做宾语我得到了他正在读的那本书.(同一本书) as(so)+adj+a+名词+as从句只能用名词单数
as 引导定语从句, 在定语从句中作主语、宾语、表语
as的用法: (as引导定语从句,在定语从句中作主语、宾语、表语) (1)如为限制性的，多用于the same …as ; the same as；such …as …; as many/muchas；so …as等结构中。如： 1. I have the same book as you (have).我有一本和你的一样的书。 Her attitude to him was quite the same as it had always been. (关系代词as和指示代词same连用,在从句中用作表语,先行词是same.) 2.---Why didn't you mention that in face of the police just now? --- I thought it was such a minor detail as was hardly worth mentioning. We will only discuss such problems as have something to do with our own interests.Don't do such things as you are not sure about. There is no such place as you dream of in all this world. 比较： I live in the same house that he used to live in. I'm wearing the same shirt as you wore yesterday. 比较： Here is so big a stone as no one can lift.（定语从句） Here is so big a stone that no one can lift it.（结果状语从句） (2)如为非限制性的，多单独引导一个定语从句，这种定语从句可置于句首，句中或句尾，译为"正如，这一点"。（动词常为know, see, expect, point out, etc.） 1. As we all know, smoking is harmful to one's health . (as作宾语) =As is known to all, smoking is harmful to one's health .（as作主语）
as和which的用法区别
非限制性定语从句中的as和which ■as 和which的相同点 (1) as 和which都可引导非限制性定语从句，放在主句之后；在非限制性定语从句中充当从句的主语、宾语或表语。如： Tom has found a good job, as / which we all hope. 汤姆找到了一件好工作，这正是我们大家所希望的。 (2) as 和which都可代表整个句子的内容或主句中的某一成分。如： His mother is ill, which makes him very sad. 他母亲病了，这件事情使他很难过。 He has made great progress, as / which makes us very happy. 他进步了，这使得我们很高兴。 以上两句中的as / which都指前面整个句子的内容。 Though he has lots of money, he still rides his old bike, which was bought ten years ago. 尽管他很有钱，但是他还骑着他的旧单车，这单车是十年前买的。 There you can meet many writers as you have ever read in books. 在那里，你可见到你在书中所读过的很多作家。 ■as与which的区别 (1) 当先行词前面有so + adj. + a / such + (a) + adj. , the same等词修饰时，引导词只能用as，而不用which。如： She is so nice a girl as we all like. 她是个我们大家都喜欢的如此好的女孩。 It is such an interesting book as we all want to read. 它是本我们大家都想读的有趣的书。上面两句中的as就不能用which替换。 (2) as 在从句中常作宾语；作主语时，从句的谓语动词常为系动词，即：系表结构或被动结构。如： As is said above, he has conquered the difficulty. 正如上面所说，他征服了困难。
定语从句用法总结
定语从句用法总结 一.定义：定语由一个句子来充当，那么这个句子就叫做定语从句。 eg: The old town has narrow streets and small houses that are built close to each other.其中划线部分为定语从句。 二.分类：分为限制性定语从句和非限制性定语从句，还有间隔性定语从句。 eg: is the school (that/which)we visited last year. （限制性定语从句） weather turned out to be very good,which was more than we could expect. （非限制性定语从句） days are gone when physical strength was all you needed to make a living.（间隔性定语从句） ] 注：定语从句和非限制性定语从句的区别 限制性定语从句无逗号隔开、不可缺少、起修饰限制作用；而非限制性定语从句有逗号隔开、可有可无、起补充说明作用。 三.构成：定语从句有先行词、引导词和从句构成。 先行词是定语从句所修饰限制的名词或代词。 引导词是用来引导定语从句的关系代词或关系副词。 eg: The old town has narrow streets and small houses that are built close to each other. 此句中先行词为：narrow streets and small houses, ( 引导词为：that，定语从句为：that are built close to each other 四．基本原则 定语从句中不能出现与先行词在意义上相一致的词 is the book that I like it best .(it 与book指同一物，所以要去掉。) 五．定语从句中常见考点：
As引导的定语从句(含配套练习与答案)
As引导的定语从句（配练习与答案） 一、Review定语从句 1. 定语从句的基本用法 2. 限制性定从的基本用法 a. 作用：起限定作用, 不可省，使句意不完整。 b. 位置：位于先行词之后，不用逗号。 c. 翻译：用形容词的形式去翻译。 d. 修饰：先行词。 ! Eg: He has two sisters who are working in the city. （他有两个在城市里工作的妹妹。） 3.非限制性定从 a.作用：起补充说明, 可省。 b.位置：位于先行词之后，用逗号隔开。 c.翻译：译成两个并列句。 Eg: He has two sisters , who are working in the city. (他有两个妹妹，都在城市里工作。) d.不能用“that”引导非限制性定从。 e.修饰：先行词或整个句子。 (which可指代整个句子) f.^ g.Eg: He missed the show, which was a great pity. (他错过了那个节目，真是太遗憾 了。) h.表达先行词部分或全部的数量的结构为：先行词为人：some/all + of +whom 先行词为物：some/all + of +which Eg: Here are the questions , some of which I thought are very easy. 二、as 引导限制性定从 1. as 作关系代词, 可指人也可指物, 在从句中可作主语和宾语。 2. 固定搭配: such as (例如, 象这样)，as…..as (和…..一样)，the same as (与…..相同) Eg: Such people as had made great contributions should be respected. (主语) # Eg: You can take as many books as you need. （宾语） 三、As引导的非限定性定从句
定语从句用法归纳
定语从句用法归纳 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： ?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 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。
(完整版)定语从句as的用法
as 引导定于从句： 1、as用作关系代词和关系副词引导限定性定语从句，并在从句中做主语、表语和状语，构成the same ...as, such...as等结构。 Eg: I have got into the same trouble as you. 2、as引出非限定性定语从句时，代替整个主句，对其进行说明。但通常用于：（as we all know, as it is known, as is known to all, as it is, as is said above, as always mentioned above, as is usual, as is often the case, as is reported in the newspaper) . as在非限定性定语从句中作主语、表语或宾语，且引出的从句位置比较灵活，可位于句首或句末，也可置于主句中间。通常均由逗号将其与主句隔开。 as有“正如……，就像……”之意。 Eg: As is known to the United States, Mark Twain is a great American writer. 美国人都知道,马克·吐温是一位伟大的美国作家（as在从句中作主语）He forgot to bring his pen with him, as was often the case. 他忘了带笔，这是常事。（as在从句中作主语） He is absorbed in work, as he often was. 他正在全神贯注地工作，他过去经常这样。（as在从句中作表语）As we all know, the earth is round. 众所周知，地球是圆的。（as在从句中作宾语）
As引导各种从句归纳
As引导的从句 一、As引导让步状语从句 为了帮助同学们全面掌握让步状语从句的倒装 用法，本文将这类语法现象归纳为以下五种句型： 1、名词+ as / though +主语+动词 King as he was，he was unhappy. 他虽是国王，但他并不幸福。 Child as he is，he knows to help other. 他虽是个孩子，却知道帮助别人。 【说明】其中的动词通常为连系动词，也就是说位于句首的名词是其后连系动词的表语。另外，要特别注意位于句首的名词前习惯上不用冠词，即使其前有形容词修饰也不用冠词。比较： Boy as ［though］he is，he likes to play with girls.=Though he is a boy，he likes to play with girls. 他虽是男孩，却喜欢与女孩子玩。 Strong man as ［though］he is，General Botha has been severely put to the test during the
past few weeks.= Though he is a strong man，General Botha has been severely put to the test during the past few weeks. 波赛将军虽然坚强，但在过去的数周里也受到了严峻的考验。 2、形容词+ as / though + 主语+ 动词 Successful as he is，he is not proud. 他虽然成功，但不骄傲。 Improbable as it seems，it’s true. 虽然看起来不太可能，但却是真的。 Stupid as it sounds，I was so in love with her that I believed her. 尽管听起来很愚蠢，我是如此爱她竟然相信了她的话。 Patient as he was，he didn’t like waiting that long. 他虽说有耐心，也不愿等这么长。 Beautiful though the necklace was，we thought it was over-priced. 那条项链虽然很漂亮，我们认为价钱太高。
as引导定语从句时的特殊用法
as引导定语从句时的特殊用法 关系代词as既可以引导限制性定语从句，也可以引导非限制性定语从句。as可以在从句中作主语、宾语或表语。 1. as引导限制性定语从句 as引导限制性定语从句，置于先行词之后，与其词义关系密切，不可分割。如： He is such a good boy as everyone likes.他是大家都喜欢的好孩子。 Such machines as are used in our workshop are made in China.我们车间使用的机器是中国制造的。 as 常见搭配： 1） such+（不定冠词+）名词+as引导的定语从句，意思是“像……一样的”。如： The little boy realized that there was no such a tank as he dreamed of after he got to the museum. 那个小男孩儿到了博物馆后才知道没有他所想象的那种坦克。 2） the same+名词+as引导的定语从句，意思是“同一类事/物”。如： Lao Li bought the same computer as I did. 老李买的电脑跟我买的一模一样。 1. as引导非限制性定语从句
as引导的非限制性定语从句，既可以放在主语之前，也可以放在主语之后。通常用于下列句型：as is know to all，as is said，as is reported，as is announced，as we know，as I expected 如： As I expected, he got the first place again in this mid-term examination. 正如我所预料的那样，他在这次期中考试中又得了第一名。 2. as引导非限制性定语从句时与which的区别 1） 当非限制性定语从句置于主语之前时，只能用as。如： As is known to us, the moon travels round the earth. 2） 从句置于主语之后，且从句有否定词或表示否定意义时，只能用which。如： Tom was late for school this morning, which was unexpected. 汤姆今天迟到了，这让人觉得意外。 He drinks a lot every day, which his wife doesn’t like at all. 每天他都喝很多酒，他的妻子一点都不喜欢他这样。 3) 非限定性定语从句中出现expect , think , suppose 等表示猜测、想象、预料等时，只能用as She succeeded in her doing the research work , as we expected . 4)固定搭配：such/the same+as Exercises: 1.The British are not familiar with different cultures and other ways of doing things, ________is often the case in other countries. A) as B) what C) so D) that
as的用法总结
㈠、so that、so…that、such that、such…that引导状语从句的区别。so that 作为一个整体，充当一个连词引导状语从句，其前的主句完整。such that好像大多情况下跟在系动词后面，such可以理解为作系动词的表语，而that引出状语从句。 例：The difference is such that all will perceive it. I did very well in English so that I was praised by Miss Green. so…that 、such…that中so是副词，修饰后面的副词性、动词、形容词性的成分。such是形容词，修饰名词性成分。连词that引出状语从句。例：He is so honest that he will not tell a lie. ㈡、as 引导的定语从句，用在如下句型中：(先行词可是人或物) ①“as/so…as”，此结构中，第一个as或so它们都是副词，修饰主句的形容词或副词的原形，后一个as是关系代词，引导限制性定语从句。 例：In the city, I saw so grand a National Day celebration as I never dreamt of.(本句中so修饰形容词grand，as作为关系代词引导定语从句且在从句中作of的宾语。) ②such…as(这个句型中，such是代词，作名词的定语，修饰其后的名词，as是关系代词，参见《大学英语语法》P120)，“such as”连用这种结构与分开的结构式一样的，只是把such与as放在一起而已。Such people as were recommended by him were reliable.（such作people 的定语，as引导定语从句，在从句中作主语，先行词为people。） I’ve never seen such a talented young man as he is.(such作a man的定
as引导的定语从句
"As”可以用作关系代词引导定语从句。 一：as可以代替整个句子或一件事，引导非限制性定语从句，在从句中作主语、宾语或表语，意为“正如……，就像……，据……”；从句位置可置于主句之前或之后，有时也可作为插入语置于句中，一般用逗号和主句隔开。 as的这种用法常见于以下这些结构:as we can see, as can be seen, as we know, as is （well） known,as may be imagined,as often happens,as has been said before,as was mentioned above,as is often the case,as/indeed it is,etc. 多看一些例句:As is well known，great changes have taken place in China.or:Great changes,as is well known,have taken place in China.众所周知，中国发生了巨大的变化。( as在定语从句中作主语。) This experiment is very simple，as indeed it is.实验非常简单，事实上也确实如此。(as在定语从句中作表语。) 注意：① which在引导非限制性定语从句时，也有和as一样的功能，可以代替整个句子，但which只能用在主句之后。 ②在as所引导的非限制性定语从句中，如果运用的是被动语态结构，be动词可以省略；但which没有此用法，be动词不可省。例如:She married him，which was unexpected.＝She married him as（was） unexpected.她嫁给了她，这一点大家都没有料到。（作主语，代替前面的句子；用which时was不可省。） 二 as除了代替整个句子，也可以代替主句中一个特定的词。as在它引导的定语从句（限制性或非限制性）中可以充当主语，宾语和表语；在这种用法中它经常和such, so, the same 等词搭配使用；且当先行词中有such, so, the same等词修饰时，关系代词通常必须用as。
as的用法总结
as的用法总结 as是英语考试中用得比较多的一个词，也是很多学生反映较难掌握的一个词。as的词性较多，用法也较复杂，因此掌握该词会对英语学习很有帮助。下面笔者就对as的用法作一个简单的归纳。 一、as作为从属连词，可以引导下列从句： 1、as引导时间状语从句，意为“正当……的时候”、“一面……一面……”、“随着……”，从句可放主句之前或主句之后。 As I was coming here, I met your brother. As he walked on, he felt himself getting more and more tired. 【知识拓展】：as与when, while都是引导时间状语从句的从属连词，含义都是"当……的时候"。但它们有区别：用when时，从句的动作可以与主句的动作同时发生，也可以先于主句的动作发生；用while时，从句的动作为一过程，主句动作与从句动作同时进行或在从句动作过程中发生；用as时，主句和从句的动作同时发生，具有延续的含义。例如： It was snowing when he arrived at the construction site.他到达工地时，天正在下雪。 He was watching TV while his mother was cooking.他母亲做饭时他在看电视。 You will grow wiser as you grow older.你会随着年龄的增长而越来越聪明。 2、as引导原因状语从句，意为“由于”大多位于主句之前，偶尔在前或后。 As this question is of great importance, we will discuss it once again. Water, as it occurs in nature, is never very pure. We couldn‘t send the children to school as life was very hard in those days.【知识拓展】：as, because, since都可以表示因果关系，连接原因状语从句，含义是“因为，由于”，但它们有区别：because表示的语气最强；as 一般放在句首，语气较弱，较口语化；since常常用在书面语中，表示多为对方已知的、或稍加分析便可得知的原因，有时可译作“既然”。例如： He will succeed because he is in earnest.他一定会成功，因为他很认真。 Since you are so sure of it he’ll believe you.既然你对此如此有把握，他会相信你的。 As rain has fallen, the air is cooler.因为下过雨，空气比较清爽。 3、方式状语从句，意为“如同”、“按照……的方式、样子、办法”。As 从句总跟在主句之后。 You must try to hold the tool as I do. 象我那样拿住工具。 Leave things as they are. 让那些东西保持原样。 3、as引导让步状语从句，意为“虽然”，多在主句之前，且多用倒装。（应将从句主要成分的形容词、副词、原形动词、不加冠词的单数名词
as在定语从句中的详细用法
as引导的定语从句 (1) as引导的定语从句修饰表人或物的先行词，即先行词可以是人也可以是物；在定语从句中可以做主语、宾语或表语；常用于the same…as…/such…as…/as(so)…as…句型，as不论在定语从句中作何成分，均不能省略。 ①Such teachers as know Tom think him bright. 先行词为人such teachers，as作主语 ②I’ll buy the same bike as I lost yesterday. 先行词为物the same bike，as作宾语,指同一类事物 ※此时注意和the same …that …引导的定语从句的区别 It’s the same bike that I lost yesterday. that引导定语从句，作宾语，指同一个事物 ※She wore the same dress that she wore at Mary's wedding. (the same…that…特指同一个) 她穿着她在Mary婚礼上穿过的同一条裙子。 She wore the same dress as her young sister wore. (the same…as …泛指同一类) 她穿着和她妹妹所穿的一样的裙子。 That is the same watch as I lost. 那块手表和我丢失的一模一样。(the same…as …泛指同一类) That is the same watch that I lost. 那就是我丢失的那块手表。(the same…that…特指同一个) ③The school is just the same one as it was 10 years ago. 先行词为物the same one (school), as作表语 It’s so heavy a box as no one can lift. 先行词为物so heavy a box，as作宾语 此时应注意as引导的定语从句和结果状语从句such / so…that…的区分 It’s so heavy a box that no one can lift it. 结果状语从句so…that…如此…以至于… ※He is such a good student as is liked by everyone. (定语从句，as在从句中作主语) He is such a good student that he is liked by everyone. （结果状语从句such…that…）that在从句中不充当任何成分，故不是定语从句，而是结果状语从句 (2) as引导的非限制性定语从句可以修饰整个主句, 可以放在主句前，主句后或插入主句中间。此时as含有“正如…”之意。常用的as引导的非限制性定语从句固定表达有： as we all know / as everyone knows / as is known to all / as is well-known (众所周知)/ as I can remember(正如我所记得的) / as we expect / as was expected (正如预料的那样)/ as often happens / as we all can see / as can be seen / as has been said before (如前所述)… As everyone knows, Shakespeare is a famous writer. Shakespeare is a famous writer, as everyone knows. Shakespeare, as everyone knows , is a famous writer. (3)注意which引导的非限制性定语从句也可以修饰整个主句, 但不能放在主句前，常译为“这一点、这件事…”。 She is working hard, which everyone can see. which引导的非限制性定语从句不能放在主句前 She is working hard, as everyone can see.﹦As everyone can see, She is working hard. (4)注意当修饰整个主句时，as引导的非限制性定语从句含“正如”之意，因此在意义上不能和主句相抵触；which引导的非限制性定语从句则无此限制。如： Our team lost the game, which was unexpected. 我们的球队输了比赛，这一点是未预料到的。此时不 能用as。 Our team won the game, as was expected. 我们的球队赢了比赛，正如预料的那样。
as和which的用法区别
■as 和which的相同点 (1) as 和which都可引导非限制性定语从句，放在主句之后；在非限制性定语从句中充当从句的主语、宾语或表语。如： Tom has found a good job, as / which we all hope. 汤姆找到了一件好工作，这正是我们大家所希望的。 (2) as 和which都可代表整个句子的内容或主句中的某一成分。如： His mother is ill, which makes him very sad. 他母亲病了，这件事情使他很难过。 He has made great progress, as / which makes us very happy. 他进步了，这使得我们很高兴。 以上两句中的as / which都指前面整个句子的内容。 Though he has lots of money, he still rides his old bike, which was bought ten years ago. 尽管他很有钱，但是他还骑着他的旧单车，这单车是十年前买的。 There you can meet many writers as you have ever read in books. 在那里，你可见到你在书中所读过的很多作家。 ■as与which的区别 (1) 当先行词前面有so + adj. + a / such + (a) + adj. , the same等词修饰时，引导词只能用as，而不用which。如： She is so nice a girl as we all like. 她是个我们大家都喜欢的如此好的女孩。 It is such an interesting book as we all want to read. 它是本我们大家都想读的有趣的书。 上面两句中的as就不能用which替换。 (2) as 在从句中常作宾语；作主语时，从句的谓语动词常为系动词，即：系表结构或被动结构。如： As is said above, he has conquered the difficulty. 正如上面所说，他征服了困难。 (3) 当非限制性定语从句放到主句的前面时，引导词只能用as，而不用which。如：