复合句名词从句疑问名词what1有疑问含义2在从句中充当一定成分3没有先行词（注：引导同位语从句有先行词）Idon'tknowwhatyousaidatthemeetingyesterday.

　　whoIwonderwhoyoumeant.

　　whomTellmewhomyougotoschoolwitheveryday.

　　whichTheyaretwins.Ican'ttellwhichiswhich.

　　疑问限定词whoseIwonderwhoseideaitwas.

　　whichSheaskedmewhichoneisthebest.

　　whatShedoesn'tknowwhatbookIlikebest.

　　疑问副词whereSheisanxioustoknowwheretheyhadbeenjustnow.

　　whenIwonderwhenandhowwecouldgetthere.

　　whyHeneverdisclosedwhyheshoulddothat.

　　howIdon'tknowhowIcouldgetintouchwithyou.

　　连接词whether有含义不充当成分Italldependsonwhethershelikesherbossornot.

　　if(只引导宾从)Icouldn'ttellifshewascryingorlaughing.

　　asif/though(补从)Helooksasifhewereaboss.

　　that无含义不充当成分Mymottoisthatcontentedwithlittleyetwishingformore.

　　Thatheisafoolisknowntoall.

　　形容词从句关系名词who1无疑问含义Hewholaughslastlaughsbest.

　　whom2有先行词sheisthegirlwhom(who)Ilovebest.

　　which3在从句中充当成分Ahousewhichoverlookstheparkwillcostmore.

　　what(无先行词)Thankyouforwhatyouhavedoneforme.

　　that4关系名词和关系限定词若有疑问含义就会变为疑问名词和疑问限定词Heknowsmostthatknowsheknowslittle.

　　asIwillprovideyouwithsuchthingsasyoumayneed.

　　thanDomorethanisexpected.Itwilldistinguishyoufromothers.

　　butThereisnomanbutlovespeaceintheworld.

　　关系限定词whoseHeisthemanwhosegrammarbookdelightsmillions.

　　whichHeislearningeconomics,whichknowledgeisveryimportant.

　　关系副词where5关系副词一旦失去先行词就会变为连接副词Whereveryouareismyhome,myonlyhome.

　　whenI'vealwayslongedforthetimewhenIshouldbeabletobeindependent.

　　whyThatisthereasonwhyshedidn'ttellyouthetruth.

　　thatThisistheway(reason/place/time)thatIdidit.

　　副词从句连接副词where,because1无疑问含义2无先行词Icangowherethewindblowsme.

　　when,while,asIalwaysfeelbetterwheneverIseeyou.

　　(so/such)thatHerheartbeatsothatshecouldhardlybreathe.

　　if,although,asifAlthoughIgaveherallIhad,yetshewasstillnotsatisfied.