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1、一、定语从句关系副词when,where,why,how的含义相当于"介词+which"结构，因此常常和"介词+which"结构交替使用，例如：1.Thereareoccasionswhen(onwhich)onemustyield. 2.Beijingistheplacewhere(inwhich)Iwasborn. 3.Isthisthereasonwhy(forwhich)herefusedouroffer? 4.I'msurprisedthewayhow(bywhich)heworksouttheproble
2、m.as，than，but也可以用作关系代词：☆Thetwobrothersweresatisfiedwiththisdecision,aswasagreedbeforehand.☆Thetelephone,asweknow,wastheinventionofAlexanderGrahamBell.☆Ineverheardsuchstoriesashetells.☆Herattitudetohimwasquietthesameasithadalwaysbeen.☆Youspendmoremoneythanwasinte
3、ndedtobespent.☆Thereareveryfewbutadmirehistalent.(but=whodon’t)二、状语从句方式状语从句通常由as,(just)as…so…,asif,asthough引导。1.Justaswesweepourrooms,soweshouldsweepbackwardideasfromourminds.2.Theycompletelyignorethesefactsasif(asthough)theyneverexisted.3.Heclearedhisthroatasif
4、tosaysomething.目的状语从句可以由that,sothat,inorderthat,lest,forfearthat,incase等词引导：1.Youmustspeakloudersothat/inorderthatyoucanbeheardbyall.2.Hewrotethenamedownforfearthat(lest)heshouldforgetit.3.Bettertakemoreclothesincasetheweatheriscold.结果状语从句常由so…that或such…that引导:1
5、.Theboyissoyoungthathecan'tgotoschool.2.Heissuchayoungboythathecan'tgotoschool.条件状语从句的连接词主要有if,unless,as/solongas,onconditionthat等：1．Let'sgooutforawalkunlessyouaretootired.让步状语从句的连接词主要有though,although1．Althoughit'sraining,theyarestillworkinginthefield.其他注意点：1．ev
6、erif,eventhough 即使We'llmakeatripeventhoughtheweatherisbad.2．whether…or 不管……都Whetheryoubelieveitornot,itistrue.43．"nomatter+疑问词"或"疑问词+后缀ever"Nomatterwhathappened,hewouldnotmind.Whateverhappened,hewouldnotmind. 替换：nomatterwhat=whatever nomatterwho=whoever no
7、matterwhen=whenever nomatterwhere=wherever nomatterwhich=whichever nomatterhow=however注意：nomatter不能引导主语从句和宾语从句。对比下面两组句子：Nomatterwhatyousayisofnousenow.(False)Whateveryousayisofnousenow.Prisonershavetoeatnomatterwhatthey'regiven.(False)Prisonershavetoeat
8、whateverthey'regiven. 三、名词从句名词从句包括主语从句、宾语从句，其中有介词与形容词的宾语从句、表语从句和同位语从句。同位语从句一般用that,whether等词引导，常放在fact,news,idea,truth,hope,problem,information等名词后面，说明该名词的具体内容。Thenew
