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1、定语从句考点透析1.as引导限制性定语从句先行词必须有such或thesame或用于as/so…as结构Suchteachersasheknowsareallkindtohim.Iwanttobuythesamepenasyouareusing.Letstudentsreadsuchbooksaswillmakethemlearnmoreknowledge.Hecanliftsoheavyastoneasnooneelsecan.对比：ThisisthesamewatchasIlostyesterday.Butitisnotmine.Thi
2、sisthesamewatchthatIlostyesterday.It’smine.such…as…such…that…Heissuchalearnedmanasweadmire.Heissuchalearnedmanthatweadmirehim.Heissolearnedaman_____weadmire.Heissolearnedaman_____weadmirehim.缺成分用as,不缺成分用that定语从句结果状语从句asthat2.as引导非限制性定语从句Yantaiisfamousforapples,asweallknow.
3、=Asweallknow,Yantaiisfamousforapples.=Yantai,asweallknow,isfamousforapples.As引导非限制性定语从句，代表主句所表达的整个内容，译为“正如……”，可放在句首，句中，句末。常见的as固定短语asissaid/reported/mentionedabove正如以上所说/报道/提到的一样asisoftenthecase像一般情况一样asitis正如现在的这个样子asweknow/asisknowntoall/asiswellknown正如我们所知aswecansee正如我们
4、看见的asithappens碰巧，偶然asthesayinggoes俗话说对比：Asiswellknown,Yantaiisfamousforapples.ItiswellknownthatYantaiisfamousforapplesWhatiswellknownisthatYantaiisfamousforapples.As引导非限制性定语从句It作形式主语，that引导主语从句What引导主语从句即时练习：______isreported,thetalksbetweenthetwocountriesaremakingprogress.
5、______isreportedthatthetalksbetweenthetwocountriesaremakingprogress.______isreportedisthatthetalksbetweenthetwocountriesaremakingprogress.AsItWhat（1）限制性定语从句对先行词起到限定，区分的作用，并与先行词有着不可分割的关系，如省去，剩下部分意义就会不完整或不清楚。Thosewhowanttogopleaseputupyourhands.Amanwhodoesn’ttrytolearnfromot
6、herscan’thopetoachievemuch.3.限制性与非限制性定语从句(2)非限制性定语从句只对先行词作进一步的说明和描述，如省去，剩余部分仍然意义完整，表达清楚。非限制性定语从句的前后往往有逗号与其余部分隔开。译成汉语时，可译成两句话,that不能引导非限制性定语从句。Dr.Brown,wholivesnextdoor,comefromAmerica.Hiswife,whoworksinQingdao,willbebackhometomorrow.WewillspendthissummerinKunming,whereitis
7、warminwinterandcoolinsummer.(3)限制性定语从句与非限制性定语从句所表达的含义不同。Ichosethebookswhichhavepicturesinthem.我只选了有插图的书。Ichosethebooks,whichhavepicturesinthem.这些书都有插图，我全都选了。Hisbrotherwhois18isasoldier.他十八岁的弟弟是个士兵。（不止一个弟弟）Hisbrother,whois18isasoldier.他弟弟十八岁，是个士兵。（只有一个弟弟）(4)Which引导非限制性定语从句，
8、还可以代表主句所表达的整个内容，也可以代表主句的一部分内容，这时which可译成“这一点……”,只能放在句末（主句之后）。Theboyfailedtopassthecollege
