英语中关系代词which和as的区别
as 和 which 的 区别
as 和which 的区别as 和which 都可用作关系代词来引导从句，它们两个到底有什么不同呢，这是同学们经常觉得困惑的地方。
下面详细讲讲它们之间的联系和区别，希望能解开大家心中的结。
一、as, which 指代整个句子或短语。
由as, which 引导的非限定性定语从句，相当于and this或and that。
在很多时候，表示说话人对话语的看法或态度，此时它们的先行词并不是具体的某个词，而是整个句子或短语：The Chinese government has decided to develop the west of China, which, I dare say, will benefit the people there, especially those who are still leading a poor life. 中国政府决定开发西部，我敢说，这将造福于西部的人民，特别是那些至今过着贫穷生活的人。
She has married again，which delighted us.她又结婚了，这使我们很高兴。
John said he’ d been working in the office for an hour，which was true.The result of the experiment was very good，which we hadn’t expected.Carol said the work would be done by October，which personally I doubt very much.二、as, which 用在句末的时候，有些情况下可以互换使用。
He was late for school，as/which was usual with him.他上学迟到，这是家常便饭。
He was a foreigner，as/which I knew from his accent.他是个外国人，我从他的口音中得知这一点。
定语从句中关系代词as与which的用法
学法新探关系代词as与which在定语从句中有时可以相互替换，但又有不同之处，稍不留心，极易使用不当，出现差错。
对此，笔者剖析了关系代词as与which在定语从句中的用法，以期能够帮助同学们准确把握和运用。
一、关系代词as与which在限制性定语从句中的用法关系代词as、which均可以用于限制性定语从句中，有时可以相互替换，但两者仍有着一定的差异，具体体现在：（1）当定语从句中的先行词为某物，且先行词前面有so,such,the same，as many/much等修饰语时，则只能用as引导限制性定语从句，不能用which引导。
比如：①It’s the same book as I bought yesterday.这本书和我昨天买的一样。
（不能用which代替as）②HongKong is so prosperous a city as is referred to as a shop-ping paradise.香港是一个繁荣的城市，被称为购物天堂。
(不能用which代替as)③These housed are sold atsuch a low price as people expected.这些房子按人们预料的那样低价出售了。
(不能用which代替as)（2）当先行词是表示某物的名词或代词时，且在从句中又做介词宾语时，则不可以用as引导限制性定语从句，只能用which引导限制性定语从句。
如：①Thisis the good car on which I spent all my money.这是我花了所有钱买的那辆好车。
（不能用as代替which）③This is the knife with which we cut the bread.这是我们切面包用的刀。
（不能用as代替which）③There is amountain of which the top is always covered with snow.有一座山顶总是覆盖着雪的山。
as which在定语从句中 区别
as和which引导非限制性定语从句的区别1.as引导的非限制性定语从句1)位置灵活，可以置于主句的句首、句中或句末；2)先行词不可是一个词，必须是整个主句或主句的部分内容；3)有“正如、像”等意思，表依据、评论（、态度、看法）等；如：a.This elephant is like a snake，as anybody can see．像任何人都能看见那样，这头象像条蛇。
b.He failed in the exam, as we had expected.c.Tom has passed the test, as everybody knows.正如每个人所了解的那样，汤姆通过了考试。
【比较：Bamboo is hollow，which makes it very light．竹子是空的，这就使得它很轻。
】4)常用以下谓语动词的主、被动语态：know, see, say, expect, imagine, hope, believe,announc e, suggest, report, point out…,例：a.主动（做宾）：as we all know, as you know,as everybody knows;as you see, as wecan see,as we have seen, as anybody can see; as was expected; as we canimagine,as we have imagined…a)As we all know, the earth is round.b)He was a foreigner, as I know from his accent.c)Mike, as we expected, attended the meeting．像我们所期望的那样，迈克参加了会议。
b.被动（做主）：as is known to everybody,as is known to all; as has been expected;as is often the case (with …)，as has been pointed out, as is usual with, as isreported in the newspaper…a)He is an honest man, as is known to all.b)As is often the case with young people, he was overconfident.c)He wasn't unconscious，as could be judged from his eyes．他并未失去知觉，这从他的眼神可以判断出来。
定语从句中关系代词 as, which的区别
关系代词as, which的区别
5.从句内容为否定意义时，常用which： The young lady married an old man with a lot of money， which is disgraceful（不光彩的）. 6.如从句中行为动词是含有复合宾语结构，一般 要用which作主语： Tom has made great progress, which mቤተ መጻሕፍቲ ባይዱde us happy.
定语从句中关系代词 as, which的区别
关系代词as, which的区别
1.放句首或句中引导从句，只能用as; 从句在句末，无其他限制条件时，既可用 which，也可用as。 句型模式为：as …,主语＋ 谓语； 主语， as…， 谓语； 主语＋ 谓语，as/which… 2.当从句和主句语义一致时，用as，反之则用 which: She has married again, as was expected. She has married again, which was unexpected.
关系代词as, which的区别
[备注] (1)the same ...as ...表示相似的东西 the same ...that ...表示同一人或物 This is the same knife as I lost. 这把小刀和我丢的那把一样。 This is the same knife that I lost. 这把小刀就是我丢的那一把。 （2）such ...as 像……那样(定语从句) so/such ...that 如此……以至于…… (结 果状语从句)
关系代词as, which的区别
4.固定搭配：
在引导词＋be ＋done 结构中省略be时，只能 用as： The material resists heat （耐热），as shown in the experiment. 常见固定用法as is well known, as is often the case, as often happens, as has been said before, as has been pointed out, as can be seen等常用as，意为“正如” ： The air show（航空展 ） being held in Zhuhai is fantastic, as can be seen. It never rains but pours in this area, as is often the case.
非限制性定语从句中的关系代词which和as用法辨析
龙源期刊网 非限制性定语从句中的关系代词which和as用法辨析作者：邵玉金来源：《新高考·高三英语》2013年第03期请看下面两道题：① He has won the game， was expected.② He has won the game， was unexpected.A. thatB. whichC. itD. as以上两题选项中均含有关系代词which和as，该选哪一个呢？现就以下几个方面来谈一谈它们的区别（本文所谈的which和as是指引导非限制性定语从句中的关系代词which和as）。
一、位置关系：关系代词which不能放在句首；关系代词as 既可以放在句首也可以放在句末，甚至还可以放在句中。
1. As is known to all， he studies very hard.（不可用which）2. New concept English is intended for foreign students， which is known to all of us.（which不可放在句首，这里也可以用as）3. He， as you know， is clever.二、内涵关系：as有“正如”、“就像”之意，即主从句意义一致；which 则没有此意。
He is a foreigner from North America， as I know from his accent. （as表示“正如”之意）Tom is so busy that he has to work at weekends，which he doesn’t like.三、先后关系：as引导的多为经常性行为，或先于主句发生的动作；which引导的多表示发生在主句之后的行为。
定语从句中as与which用法异同 (1)
定语从句中as 与which用法异同摘要：定语从句作为高考必考的语法项目之一，受到同学和教师的关注。
为了使同学们在高三学习及以后的复习阶段有章可循，不盲目，不失分，本文就定语从句中as和which 的用法作一简单比较。
关键词: as 与which 异同定语从句在高中语法的学习中是一个难点，也是高考必考的语法项目之一，为了使同学们在高三学习及以后的复习阶段有的放矢，现将定语从句中as和which的用法做一比较，供大家参考。
一、在限定性定语从句中as 和which 作为关系代词用法有差异：⑴、as 常与such, the same, as, so等词连用构成定语从句。
as 在定语从句中作主语、宾语、表语，这时作宾语的as 不可以省略。
as 在从句中指前面提到的人或物。
Such people as (people such as) you describe are rare nowadays.(你所描述的人现在已很少见了。
)I have the same trouble as you ( have ).(我和你有同样的困难。
)张道真 1995 实用英语语法［M］北京外语教学与研究出版社（7）：573-574He is as great a man as ever lived.注意：①the same ---as 引导的定语从句和the same ---that 引导的定语从句不相同。
the same---as 表示的是“和---一样的”所指的是同一类事物。
the same---that表示的是“如---一样的”所指的是同一个事物。
下面试比较：I bought the same dictionary as you bought.（我买了一本和你的一样的词典。
）I met the same person that I saw yesterday.（我遇见了昨天你看见得那个人。
）马德高，朱崇军 2008 高中英语语法全解［M］北京中国社会出版社 (7):252②such--- as---中，as 引导定语从句，as 在从句中作主语、宾语等; such--- that ---中的that 引导的是结果状语从句。
as和which在非限制性定语从句中的区别
as和which在非限制性定语从句中的区别作者：王艳霞来源：《新课程·教师》2010年第10期在非限制性定语从句中as和which是经常使用的关系代词,他们都可以指代整个主句,相当于and this或and that,但它们还是有各自的使用规则,有所区别。
一、从意义上看,as一般指代人们日常生活中都知道的常识性的东西,因而常被译成“正如”;而which代指前面主句的内容,意为“这一点”。
二、从位置上看,as引导的非限制性定语从句,既可放在主句前又可置于主句后,有时还可插入主句中,而which引导的非限制性定语从句只能置于主句之后。
例如:The weather turned out to be very good,which was more than we could expect.结果天气非常好,这一点我们没有料到。
As is known to everybody, the moon travels round the earth once every month.The moon travels round the earth once every month,as/which is known to everybody.众所周知,月亮每月绕地球转一次。
三、当定语从句放在主句后面时,一般用as和which都可以,但也不总是这样,例如:1.当非限制性定语从句是否定句或表示否定意思时只能用which。
如:He came here very late,which was unexpected(not expected).他迟到了,这是意料之外的。
2.当as在从句中作主语时,后面常接动词的被动语态,如be known、be said、be reported、be announced等。
如果从句是主动语态,一般用which作主语,如:She has been absent again,as is expected.她又缺席了,这在意料之中。
高中英语定语从句：As 和which 引导定语从句精讲精练
关系代词as和which 引导的定语从句as和which引导非限制性定语从句，有相同之处也有不同之处。
具体情况是：1. As和which都可以在定语从句中做主语或者宾语，代表前面整个句子。
He was honest, as/which we can see.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which 指代整个句子不可置于句首只能位于主句后。
1. They didn’t come to school on time, which made the teacher angry.2. The sports meeting was put off, which astonished (吃惊）us greatly.3. His father died last year, which made it impossible for him to go to school.4. He didn’t pass the exam, which disappointed his parents.as 引导定语从句，位置灵活，可位于句首、句中和句末。
As we all know, China is a developing country.The number of the visitors, as we had expected, was over 200.China is a great country with a long history, a s is known to all.注意:当主句和从句存在逻辑上的因果关系时,主句与从句有因果或并列，从句谓语动词是“系动词+adj" 使用whichOur class has won the volleyball match, which is inspiring.Tom suddenly fell ill, which made us sad. Tom突然病倒，这使得我们很伤心。
关系代词as与which引导的非限制性定语从句的区别
关系代词as与which引导的非限制性定语从句，其先行词都可以是整个主句，指代主句的整个意思。
但as和which具有不同的词义、句法和用法。
1. as引导的从句表示说话人的看法、态度、解释或评论引导定语从句时，as仍具有“正如，像，由……可知”等意思，翻译时有时可不必译出。
as定语从句常含有这些动词：see, know, hear, watch, remember, say, tell, show, expect, guess等，这类动词与as连用几乎成了一种固定搭配。
as引导的此类从句可以置于句首、句中或句尾。
如：The famous magician Liu Qian, as we all know, is from Taiwan. 众所周知，著名魔术师刘谦是台湾人。
There is a net bar around here, as I remember. 我记得这儿附近有一家网吧。
As is often the case, girls like dolls while boys like guns. 女孩子喜欢玩具而男孩子喜欢枪，这是常见的情况。
2. which引导的从句对主句所叙述的事情进行补充说明，表明事物的状态或结果which此时指前面主句所提到的这件事，常译为“这一点，这件事”等。
这时它所引导的从句与主句之间常含有并列、因果关系。
注意，它引导的从句不像as那样位置灵活，它只能位于主句的后面。
如：He changed his mind again, which made us all angry. 他又改变了主意，这使我们大家都生气了。
She tore up my photos, which (=and that) upset me.她撕碎了我的照片，这使我很不安。
3. 在从句中作定语或介词的宾语时，要用which，不用asJenny might come, in which case I'll ask her. 詹妮可能会来，要是那样的话我就去问她。
定语从句aswhich区别
定语从句aswhich区别定语从句as which区别as和which作为关系代词都可以用来引导非限制性定语从句，指代整个主句所表达的内容，在从句中作主语或宾语，但它们在用法上有区别，这一点许多学生往往搞不清楚。
下面我们来了解一下定语从句as which区别吧!第一、在限制性定语从句中的区别：as 的用法：其通常和such the same连用，代指物在从句中做主语或宾语This is the same pen as I bought yesterday。
这种笔和我昨天买的笔一样(同样的但不是同一个)。
引导定语从句的关系词在从句中做宾语，因先行词被the same所修饰所以用as引导注意：上句与下句的区别This is the same pen that I used yesterday.这就是昨天我使用的那一支钢笔(指的是同一个)。
I studied in the same school as she did in Beijing.我和他在北京的同一所学校就读。
引导定语从句的关系词在从句中做宾语，因先行词被the same所修饰所以用as引导I want to have such a dictionary as he has.我想要一本和他的一样的字典。
引导定语从句的关系词在从句中做宾语，因先行词被such所修饰所以用as引导which的用法：关系代词，在从句中做主语或宾语，做宾语时通常可以省略(直接做介词的宾语时除外，不能省。
)The radio which he bought yesterday doesn't work now.他昨天买的收音机现在坏了。
引导定语从句的'关系代词在从句中做宾语，代指物，故用which.Can you lend me the book which was written by Lun Xun..你能借我那本由鲁迅所写的书吗?引导定语从句的关系代词在从句中做主语，代指物，故用which.This is the park which is the most beautiful one in our city.这是我们这个城市最漂亮的公园。
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英语中关系代词which和as的区别
我们都知道，which和as都可以引导非限制性定语从句，有时可以互换使用。
但两者的用法又有所不同。
何时用which，何时又必须用as?是不是有些傻傻分不清?!来来来，今天就把这个问题一次拎清~~~
(1)位置上，as可放在句首、句末，也可插入主句中;which一般放在主句之后(有时也可用as)：
As we all know, reading is very important.
Reading is very important, which we have already known when we were very young.
(2)意义上，as有正如、按照、正像之意，一般用在肯定句中;which可用于含肯、否定意义的句子中：
He failed in the exam again, as was expected.
He failed in the exam again, which was unexpected.
(3)当定语从句所修饰的主句内容是谓语动词的对象时，常用as，如：
Jack was admitted into the university, as we had expected.
(4)固定结构，用as：
as has been said before as often happens
as is well known as we all can see
the same...as such...as
(5)当关系代词代表主句引起的结果，又做主谓宾补(SVOC)结构中的主语时，多用which：
He passed the exam, which made him delighted.
(6)在从句中作介词宾语时，用which，如：
They went to the zoo, after which they saw a film.
(7)在从句中代表主句中的谓语的整个概念时，常用which，如：
He can write a letter in English, which I cannot.
(8)指代主句中某一名词时，多用which，如：
Beijing, which he was born, is our capital.
(9)代替主句中的形容词时, 常用which，如：
Lily thought me clever, which she herself was.
在定语从句中，相比于which VS that，who VS that，我们对which与as两者区别的关注度要少很多，在遣词造句或是口语表达中，也常常是“跟着感觉走”。