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1、名词性从句主语从句（subjectclause）宾语从句（objectclause表语从句（predicativeclause）同位语从句（appositiveclause）Whathesaysisimportant.主语从句Thisiswhathedoeseveryday.表语从句Idon’tknowwherehewent.宾语从句Idon’tknowaboutthefactthatheisateacher.同位语从句判断以下句子是属于什么从句Whetherhewillworkthereisnotcertain.主语从句Thefac
2、tthatshewonthegamesurprisedus.同位语从句Itisknowntoushowhebecameawriter.主语从句Shealwaysthinksofhowshespentherchildhoodinthevillage.宾语从句Thathegotthefirstprizeisexciting.主语从句Itlooksasifitisgoingtorain.表语从句连接代词what,whatever,who,whoever,whom,whomever,whose,which,whichever连接副词when,
3、where,how,why,whenever,wherever,however连接词that(不充当从句的任何成分,一般不省略掉）whether,if（是否）asif/asthough（好象）引导名词性从句的关联词连接代词在句中充当名词的功能，如Idon’tknowwhatIshoulddo.what充当do的宾语。连接副词在句中充当状语，如Idon’tknowwherehewillgo.连接词在句中不充当成分，只起连接主句和从句的作用，如IknowthatheisfromChina.1.Idon'tknow______hispare
4、nts’jobsare.AthatBwhatCwhyDwhichThetroubleis____Ihavelosthisaddress.AthatBwhichCwhatDwhereThisis_____theyoncelived.AwhereBwhatCwhichDwhenMyquestionis____heleftornot.AwhetherBwhenCifDwhyWhich和what,that区别That不充当成分,what充当名词指物which指“哪一个”常有个范围.Iwillgototheshop,butIdon’tknow_
5、__ishouldbuy.IwillgototheshoptobuysomebooksbutIdon’tknow____oneIshouldbuy.IwillgototheshopandIknow___Iwillbuyabook.whatwhichthatthat不能省略的情况:一,引导主语从句,表语从句,同位语从句的时候一般不省略,引导宾语从句一般可以省略,但以下情况中也不能省略.1.有两个宾语从句.第一个that可以省略,第二个不能省略.如Ithink(that)itwouldrainthisafternoonandthatwes
6、houldtaketheumbrella.2.跟在宾语从句中介词后面一般不省略如:Iknownothingabouthimexceptthathelovesbasketball.3.that引导的宾语从句,主从句中间有插入语.如Hesaid,inpeople’sopinion,thatweshouldlearnfrommistakes.4it充当形式宾语时候也不省略如Hemadeitclearthatweshouldn’tleaveuntil5o’clock.ItoldhimthatIhadalreadyboughthimaticke
7、tand____themoviewouldstartatseven.AwhatBwhichCthatDwhere只能用whether不能用if的情况.1.在主语从句,表语从句和同位语从句中只能用whether.2.碰到不定式也只能用whether.如:Hedoesn'tknowwhethertostayornot.3.介词后面也只能用whether,如:Itdependsonwhetherheisready.4.碰到ornot的时候也只能用whether,如Idon'tknowwhetherornottheywillcometohel
8、pus.Whetherif可互换的时候在宾语从句中跟在及物动词后面可互换.如:Idon'tknowwhether/iftheywillcometohelpus.Theproblemis____weshouldputoff
