【初中英语】定语从句as和which的用法(1)

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。

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.。

as和which引导定语从句的区别as和which引导定语从句的区别导语：As 和which都可以引导非限定性定语从句，在用法上有一些区别。

欢迎阅读！1.as 和which都可以在定语从句中作主语，宾语，既可修饰一个词也可修饰前面的整个句子。

A.She accepted his proposal, as(which)was natural.她接受了她的求婚，这是自然而然的。

B.The boy is pretty handsome, as(which)we can see in our classroom.这个男孩非常的帅气，正如我们在教室看到。

2.as 在非限定性定语从句中的使用2.1 as可以放在主句之前，主句之后，也可以放在句中，可以说位置很灵活。

但是which常用在主句之后A.As we know,technology just like a engine to push the development of economics.众所周知，技术就像是引擎推动着经济的'发展。

B.The diva,as you know, is famous throughoutthe world.这个女歌剧演唱家，正如你知道的，在全世界都出名。

C.He has stood her up, which I don`t believe.他没有赴约，这事我不相信。

2.2 as与the same，such 连用时，用as。

A.This is the same phone as I have borrowed from my sister.这个手机和我向我姐姐借的一样。

B.I have never had such a chance to make a speech as I always imagined.我从没有这样一个机会去演讲，正如我一直想象的那样。

2.3在从句中谓语动词为被动语态，缺少主语时用as，不用which。

关系代词as和which在非限制性定语从句中，as和which可代替整个主句，相当于and this或and that。

二者的区别主要在于：(1) as引导的非限制性定语从句既可以在主句前，也可以在主句后，有时还可以插入句中，常带有“正如……，正像……”的意思。

而which引导的非限制性定语从句只能放在主句之后，翻译成“这”，如：(17)。

(2) 主句中出现the same, as, such, so修饰先行词，需选择as做关系代词在定语从句中作主语或宾语，如：(17)As we know, smoking is harmful to one's health.(18)This house is not such as I expect.(such为代词，作先行词；as在从句中作宾语)s, which 非限定性定语从句由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。

例如：As we know, smoking is harmful to one\'s health. 如我们所知，吸烟有害健康。

The sun heats the earth, which is very important to us. 太阳使地球暖起来，这对我们人类很重要。

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。