as和which引导定语从句的异同

1、as和which引导定语从句的区别一、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.注： which 代表整个句子，还可用于in which case, at which point, on which occasion 等。I may have to work late, in which cas

2、e I ll telephone you.我可能得晚点下班，那样我会给你打电话的。The machine may be out of order, in which case it will be repaired at once.Ten years of hard work changed her greatly, for which reason he could hardly recognize her at first sight.二、不同点：.在限制性定语从句中，当先行词被the same, such ,as ,so修饰时，要用as代替who ,whom ,which或者that引导

3、定语从句。Such men as heard him were deeply moved.听过他说话的人，都会深受感动。（as在定语从句中作 heard的主语）Ive never heard such stories as he tells.我从未听过像他讲的这样的故事。（as在定语从句中作tell的宾语）He lifted so heavy a stone as no one else can lift.他搬起别人都搬不起的大石头。（as在定语从句中lift的宾语）注息：在the same as结构中，as也可用that代替。但严格地说，the same as强调相同，the same th

4、at 注重同一。She wore the same dress as her younger sister wore.她穿着跟她妹妹所穿的一样的衣裙。（as指的是与先行词相似的同类事物）She wore the same dress that she wore at Marys wedding.她穿着她在玛丽婚礼上穿过的同一条连衣裙。（that指的是与先行词同一事物）定语从句 such/asas与结果状语从句 such/asthat 的区别：as在所引导的定 语从句中作主语，宾语；that在结果状语从句中不做成分He has such a good laptop as I want to bu

5、y.He has such a good laptop that I want to buy one.He lifted so heavy a stone as no one else can lift.He is so young a boy that he can t go to school.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。As is known to all, China is a developing country.He is from the south, as we can see from his accent.John, as

6、you know, is a famous writer.Li Ming is late, as is often the case.t believe.He has been to Paris more than several times, which I don3. as有芷如，正像”的意思, as is often the caseas was expectedas often happensas has been said beforeas is mentioned aboveas everybody/we can seeas is known to all=as we all kn

7、ow而 which则没有。常用的句型有：（这是常有的事）（不出所料）（正如经常发生的那样）（如上所述）（正如上面所提到的）（正如大家/我们所看至U的）（众所周知）4. 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。（即 as引导的定语从句在意义上不是否定的。）He married her, which was unexpected.他和她结婚了，这是出乎意料的。（不可用as）He failed in the experiment, which was unexpected.The owner of the cinema needed to make a lot o

8、f improvements and employ more people to keep it running,meant spending tens of thousands of pounds.A. whoB. thatC. asD. whichJim passed the driving test,surprised everybody in the office.A. whichB. thatC. thisD. itThe road conditions there turned out be very good,was more than we could expect.A. it

9、B. whatC. whichD. thatMark was a student at this university from 1999 to 2003,he studied very hard was made Chairman of the Students Union.A. during which timeB. for which timeC. during whose timeD. by that timeThe Science Museum, we visited during a recent trip to Britain, is one of London s touris

10、t attractions.A. whichB. whatC. thatD. whereThe Beatles,many of you are old enough to remember, came from Liverpool.A. whatB. thatC. howD. asexplained on the phone, your request will be considered at the next meeting.A. WhenB. AfterC. AsD. Since8.is often the case, we have worked out the production plan.A. WhichB. WhenC. WhatD. As9.has been announced, we shall have our final