aswhich引导非限制定语从句时的区别课件.pptx

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1、The earth is round._ is known to all.The earth is round,_ is clear to us._ is known to all,the earth is round_ is known to all that the earth is round.Itwhich/as AsIt2.as 具有正如之意，与之搭配的动词一般是固定的，如：具有正如之意，与之搭配的动词一般是固定的，如：as you know/as you see/as we planned/as we expected1.非限制性非限制性定语从句在句首时只能用定语从句在句首时只能用

2、as。主语从句主语从句 as,which as,which引导非限制定语从句时的区别引导非限制定语从句时的区别关系代词关系代词as,whichas,which引导非限制定语从句时的区别引导非限制定语从句时的区别1.1.位置不同位置不同as和和which都可指主句的整个意思，而不是主句中都可指主句的整个意思，而不是主句中的某一个词。两者均可引导非限制性定语从句，的某一个词。两者均可引导非限制性定语从句，有时可以互换。有时可以互换。as引导的非限制性定语从句，可在句首、句中、句引导的非限制性定语从句，可在句首、句中、句末；而末；而which引导的非限制性定语从句不能位于主引导的非限制性定语从句不能

3、位于主首，可在句中、句末。首，可在句中、句末。3.as/which引导非限制性定语从句的区别如下列习惯用语中：如下列习惯用语中：as anybody can see 正如人人都能看到的那样正如人人都能看到的那样as is well known=as is known to all 众所周知众所周知as we had expected 正如我们所预料的那样正如我们所预料的那样as often happens 正如经常发生的那样正如经常发生的那样as has been said before 如上所述如上所述as is mentioned above 正如上面提到的正如上面提到的2.含义不同含义不

4、同as 具有正如、好像之意，而具有正如、好像之意，而which没有此意义。没有此意义。且与且与as搭配的动词一般是固定的。搭配的动词一般是固定的。Go on Please!3.与主句语义是否一致与主句语义是否一致当从句和主句语义一致时，用当从句和主句语义一致时，用as，反之则用，反之则用which。e.g.She has married again,as was expected.She has married again,which was unexpected.Go on please!4.常用语态不同常用语态不同 as在从句中在从句中作主语作主语时，后面常接行为动词的被动时，后面常接行为

5、动词的被动语态，如语态，如be known，be said，be reported等，等，如从句中行为动词是主动语态，一般要用如从句中行为动词是主动语态，一般要用which 作主语。作主语。e.g.She has been late again,as was expected.Tom has made great progress,which made us happy.as 引导的非限制性定语从句其他用法引导的非限制性定语从句其他用法(1)This is the same pen as I lost.This is the same pen that I lost.Please compar

6、e:这本书和我丢的那本一模一样。这本书和我丢的那本一模一样。这本书就是我丢的那本。这本书就是我丢的那本。the sameas 引导的限制性定语从句引导的限制性定语从句其他用法其他用法(2)This is such an interesting book _ we all like.This is so interesting a book _ we all like.This is such an interesting book _we all like it.This is so interesting a book _we all like it.asthatPlease complet

7、e the following sentences and compare:asthat这是大家都喜欢的如此有趣的一本书。这是大家都喜欢的如此有趣的一本书。(定语从句定语从句)这本书如此有趣，大家都喜欢。这本书如此有趣，大家都喜欢。(结果状语从句结果状语从句)suchso 1.as1.as引导定语从句可放在句首，句中，句末，而引导定语从句可放在句首，句中，句末，而which which 引导定语从句不能放在句首。引导定语从句不能放在句首。2.as2.as译为正如（常用于固译为正如（常用于固定搭配），定搭配），which which 则没有此义。则没有此义。3.3.与主句语义一致时，用与主句语义

8、一致时，用asas引导；不一致时，则用引导；不一致时，则用whichwhich引导。引导。4.as4.as可以使用被动可以使用被动语态，语态，whichwhich常用于主动语态。常用于主动语态。1._ everyone knows,it is necessary to build a hospital.2.It is necessary to build a hospital,_ is clear to us.3.Our department will hold the meeting,_ is known by us.Asas/whichas1.Watch the girl and her

9、dog _ are crossing the bridge!A.which B.who C.they D.thatD D2.He is the only one of the three _ got the new idea.A.who have B.whom have C.who has D.whose had3.As a teacher,I seldom give my students so difficult a problem _ they can not work out.A.that B.if C.in order that D.as4._ we know now,bats(蝙蝠

10、蝙蝠)come out at night.A.As B.Which C.That D.What5.In the school there are one thousand students,and 45%of _ are girls.A.which B.those C.whom D.them6.The reason _ he didnt do his homework was _ he wasnt told to.A.why;that B.which;because C.which;that D.why;because7.You can hardly imagine the difficult

11、y she had _ enough evidence(证据证据)to prove the case.A.collected B.to collect C.collecting D.to have collected8.Can you think of a scene _ this word can be used?A.where B.which C.while D.why 9.He is the same teacher _ spoke at the meeting on the opening ceremony.A.as B.whom C.that D.who10.This is the

12、point _ they met some difficulty.A.when B.in which C.at which D.that11.The film brought the hours to me _ I was taken good care of in that faraway village.A.until B.that C.when D.where12.Was it in the village _ we used to live in _ the accident happened?A.where;that B.which;that C.that;where D.where;which