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1、Grammar1.主语从句除了连接词that外，还有whether,what,which,who,whom,whose,when,where,why,how,whatever,whoever等。eg:Whetherhewillgothereisnotknown.Whathesaidisnottrue.Whobrokethewindowhasnotbeenfoundout.Howheescapedisstillamystery.Wherehedidthemoneyistobefoundout.Whoevercomesiswelcome.注意：wha
2、t引导主语从句时，主句谓语动词一般用单数，但如果表语是复数名词，主句谓语动词用单复数.eg:Whatweneedismoretime.WhatIhavenowis/aretwobooks.2.宾语从句除了that外，还可用whether,if,who,whom,whose,what,which,when,where,how,why等引导。eg:Heaskedwhosehandwritingwasthebest.I’mnotinterestedinwhathe’ssaying.Thisdependsonwhetherheisinterested(o
3、rnot).Heaskedif/whetheryouhavereceivedhisletter.Sheaskedmewhyhehadchosenthatone?if/whether(1)引导主语从句，表语从句，同位语从句只用whether.eg:Thequestioniswhetheritisworthdoing.(2)做介词的宾语时eg:I’mworriedaboutwhetherhecanarriveintime.(3)引导宾语从句紧跟ornot时，eg:Pleasetellmewhetherornotyouagree.(4)与不定式连用时e
4、g:Idon’tknowwhethertoacceptorrefuse.discuss后引出宾从,或宾从是否定句时eg:Let’sdiscusswhetherweshallgobyplane.Idon’tcarewhetherhedoesn’tcome.(6)在条件从句中，用if而不用whethereg:Ifyoudon’tagreetodoit,Iwillaskanother.注意：（1）某些动词如insist,suggest,ask,demand,order,advise等，其后宾语从句用虚拟语气，即should+动原.eg:Weallins
5、istthatwemotrestuntilwefinishthework.Itwasdemandedthatweshouldsetoffbeforedaybreak.(2)否定前移。eg:Idon’tbelieveshecanmarrytheyounglawyer.3.表语从句在句中作表语，一般在连系动词后，引导词有:that,whether,asif,asthough,who,whom,whose,what,which,when,where,how,why等eg:Theimportantthingiswhatamandoes,notwhathe
6、says.Thetroubleiswhocansolvetheproblem.That’swhatweshoulddo.4.同位语从句常用that,whether,how,when,where,why等。eg:Ihavenoideahowhedidit.注意：除that外，其余连词在从句中都具有各自的意义和成分。eg:Hemustanswerthequestionwhetherheagreestoitornot.状语YouhavenoideahowworriedIwas.状语AfterYangLiweisucceededincirclingthe
7、earth,____ourastronautsdesiretodoiswalkinginspace.A.whereB.whatC.thatD.how2.Amoderncityhasbeensetupin___wasawastelandtenyearsago.A.whatB.whichC.thatD.where3.Heraisedaquestion____theworkwasworthdoing.A.ifB.thatC.whetherD.which4.Wecannotfigureout____quiteanumberofinsects,birds,
8、andanimalsaredyingout.A.thatB.asC.whyD.when5.Theseflowersaresospecia
