浅谈关系代词as,which在非限制性定语从句中的用法比较
which与as引导非限制性定语从句的异同
which与as引导非限制性定语从句的异同which与as一样,都可以引导非限制性定语从句,它们既有相同之处,也有差别。
因此在实际运用中容易混淆。
它们的某些用法在高考中也会考查。
一.相同点。
两者引导非限制性定语从句时,可指代主句中的部分或整个句子的内容,在从句中做主语,宾语或表语,位于主句之后有时可互换。
The meeting was put off, as /which was exactly what we wanted.He was a doctor, as/which I knew from his manner.二.不同点1. as可指其前后主句提到的事实或情况,因此引导的非限制性从句位置比较灵活,which可以放在主句前后,也可插入主句之中;而which 引导的非限制性从句只能位于主句之后。
As is known to all, fish can’t live without water.Air, as we know, is gas.2.在非限制性从句中,which后的be动词不可省;as而后的be动词可以省略。
She told me she won the match , which was a lie.The material is elastic, as (was) shown in the figure.3. which在非限制性定语从句做主语时可用各类动词做谓语;而在非限制性定语从句做主语时,谓语常用连系动词,如be, seem, become 等,一般不用其他行为动词。
He saw the girl, which delighted him.He didn’t say anything at the m eeting , as/which seemed very strange. 4. 如果主句中叙述的事情与从句所涉及的意向一致,多用as,用以对主句的意义进行补充;如果不一致,就用whichShe has married again, as was expected.He broke the rules again, which was unexpected.5.如表示“如同。
非限制性定语从句which和as的用法汇总一篇
非限制性定语从句which和as的用法汇总一篇非限制性定语从句which和as的用法 1非限制性定语从句which和as的用法一、相同之处当从句位于主句之后，引导词指代整个主句所表达的全部意义时，as 和which可以互换。
如：The elephant is like a snake,as/which everybody can see.大家都看得出，这头大象像条蛇。
A big earthquake occurred there last night,as/which was reported on TV.据电视报道，昨夜那里发生了大地震。
She is from Shanghai,as/which I know from her accent.她来自上海，那是我从她的口音知道的。
二、不同之处1、as引导非限制性定语从句时，位置比较灵活，可位于主句之前，也可位于主句之中或之后;而which引导非限制定语从句只能位于主句之后，不能位于主句之前。
如：_______ is known to everybody,the moon travels round the earth.A.ItB.AsC.ThatD.Which答案：B_______ is mentioned above,the number of the students in senior highschools is increasing.A.WhichB.AsC.ThatD.It答案：BAir,as we know,is a gas.众所周知，空气是一种气体。
He is very careful,as his work shows.他的工作表现表明他非常谨慎。
as引导非限制性定语从句常有“如同.那样”的含义，因此在一些固定结构中，如：as we know;as is known to all(众所周知)as we all can see(正如我们大家都能看到的那样)as has been said before/above(正如前面所述)as might be imagined(可以想象得到)as might be expected(正如所预料的那样)as is often the case(情况通常是这样)以上种种固定搭配，一般不能用which代替as。
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。
as和which引导非限制性定语从句的区别
As与which引导非限定性定语从句辨析1.as引导非限制性定语从句，只代表主语或主句的一部分所表达的意思(不能指代某个名词或代词)，可以放在主句前，后或中间，在从句中作主语或宾语、例如：As is known to all, he is the best student in our class. (as指代整个句子，作主语，置于句首)He opposed the idea, as could be expected. (as 指代整个句子，作主语，置于句末)As we all know, he studies very hard. (as 指代整个句子，作宾语，置于句首) Taiwan is, as you know, an inseparable part of China. (as指代整个句子，作宾语，置于句中)2.在非限制性定语从句中，which和as引导定语从句时的区别：a. which引导的从句不能放在主句前，而as引导的从句则既可以放在主句前，也可以放在主句后。
例如：As (正确)is often the case, he is absent.Which (错误)He saw the girl,as (正确)He had hoped.Which （正确）b.用能做关系代词，as和which都可以指代一个句子，但as有“正如”、“就像”之意，which则没有此含义。
He is a foreigner, as I know from his accent. (as指代一个句子，意为“正如”、“就像”)He has to work on Sunday, which he doesn’t like. (which指代一个句子，没有“正如”、“就像”)c.当从句的谓语动词是be或相当于联系动词的seem, become等时，可用as或which作主语。
但当从句的谓语是行为动词时，只能用which作主语。
英语as与which引导非限制性定语从句之区别
英语as与which引导非限制性定语从句之区别：练习题。
这类定语从句只能由which或as引导。
两者之间的区别在于：1. which引导的定语从句只能位于主句后，但as引导的从句可位于主句前、中、后。
如：David, as you know, is a photograopher. (不可用which)Li Ming is late, as is often the case. (不可用which)2. as在定语从句中作主语时，从句谓语通常要有be或别的系动词，但which不受此限制。
如：Li Ming was late, which (=and this) made Mr. Zhang very angry. (不可用as)3. as引导的定语从句只表示一个众所周知或意料之中的事，但which不受此限制。
如：He married her, which was unexpected. 他和她结婚了，这是出乎意料的。
(不可用as)4. as有“正如”之意，而which则意为“这(件事，一点)”，可用and this/that/it来代替。
5. as多用于固定搭配中：as is often the case(这是常有的事)，as was expected(不出所料)，as often happens(正如经常发生的那样)，as is known to all(众所周知)，as has been said before(如上所述)，as is mentioned above(正如上面所提到的)等。
注：which代表整个句子，还可用于in which case, at which point, on which occasion 等。
如：I may have to work late, in which case I’ll telephone you.As的高考知识点归纳1．as做关系代词，引导非限制性定语从句2．as引导非限制性定语从句时，指代逗号前的整个句子（即先行词），常翻译为“正如，正像”，可置于句首或句末。
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。
as, which 非限定性定语从句的用法
as, which 非限定性定语从句的用法以下是小编给大家整理的as, which 非限定性定语从句的用法，希望可以帮到大家由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. itB. thatC. whichD. 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. whatB. whichC. thatD. 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. thatB. whichC. asD. 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.。
非限制性定语从句中which与as的用法
学法新探在非限制性定语从句中，which 与as 两者既有相通之处，又有相异之点。
如果把握不到位，区别不恰当，极易出错。
对此，笔者就非限制性定语从句中which 与as 的用法差异进行了剖析，以期同学们能够准确辨析和运用。
辨析之一：观“位置”在非限制性定语从句中，which 与as 的位置有所不同。
一般地，which 引导的非限制性定语从句不能置于句首，多位于主句之后；而as 引导的非限制性定语从句的位置则十分灵活，不仅可以置于主句之中和主句之后，而且可以置于句首，即置于主句之前。
比如，①Jake passed the driving test ，which sur-prised everybody in the office.杰克通过了驾驶考试，这使办公室里的每个人都感到惊讶。
（which 引导的非限制性定语从句置于主句之后）②Paper ，as we know ，was first made in China.众所周知，纸是中国人发明的。
（as 引导的非限制性定语从句置于主句之中）③She comes from South ，as I know from his ac-cent.我从他的口音中知道她来自南方。
（as 引导的非限制性定语从句置于主句之后）④As is known to all ，China has developed quickly these years and it has become one of the most important countries in the world.众所周知，近年来，中国的发展十分迅猛，目前已成为世界上最重要的国家之一.（as 引导的非限制性定语从句置于句首）从上述几个例子可以看出，which 与as 引导的非限制性定语从句都可以置于主句之后，两者有时可以互换。
但需要注意的是，当在主句之后的非限制性定语从句为否定句或带有否定意味时，只能用which 引导，不能用as 。
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。