名词性从句在句子中起名词作用的句子叫名词从句。名词从句的功能相当于名词词组,它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。名词性that-从句1）由从属连词that引导的从句叫做名词性that-从句。That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主语、宾语、表语、同位语和形容词宾语。例如：主语：Thatheisstillaliveissheerluck.他还活着全靠运气。宾语：JohnsaidthathewasleavingforLondononWednesday.约翰说他星期三要到伦敦去。表语：Thefactisthathehasnotbeenseenrecently.事实是近来谁也没有见过他。同位语：Thefactthathehasnotbeenseenrecentlydisturbseveryoneinhisoffice.近来谁也没有见过他，这一情况令办公室所有的人不安。形容词宾语：Iamgladthatyouaresatisfiedwithyourjob.你对工作满意我感到很高兴。2）That-从句作主语通常用it作先行词，而将that-从句置于句末。例如：Itisquiteclearthatthewholeprojectisdoomedtofailure.很明显，整个计划注定要失败。It'sapitythatyoushouldhavetoleave.你非走不可真是件憾事。if,whether引导的名词从句1）yes-no型疑问从句从属连词if,whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同。例如：主语：Whethertheplanisfeasibleremainstobeproved.这一计划是否可行还有等证实。宾语：Letusknowwhether/ifyoucanfinishthearticlebeforeFriday.请让我们知道你是否能在星期五以前把文章写完。表语：Thepointiswhetherweshouldlendhimthemoney.问题在于我们是否应该借钱给他。同位语：Theyareinvestigatingthequestionwhetherthemanistrustworthy.他们调查这个男人是否值得信赖。形容词宾语：She'sdoubtfulwhetherweshallbeabletocome.她怀疑我们是否能够前来。介词宾语：Iworryaboutwhetherhecanpassthroughthecrisisofhisillness.我担心他是否能度过疾病的危险期。2）选择性疑问从句选择性疑问从句由关联词if/whether…or或whether…ornot构成。例如：Pleasetellmewhether/iftheyareSwedishorDanish.请告诉我他们是瑞典人还是丹麦人。Idon'tcarewhetheryouliketheplanornot.我不在乎你是否喜欢该计划。练习一、单项选择。1.Evidencecameup_____specificspeechsoundsarerecognizedbybabiesasyoungassixmonthsold.A.whichB.whatC.thatD.when2.Ihaven’tdecided_____hoteltostayat.A.whichB.whatC.atwhichD.where3.______surprisesmostofus.A.WolvesareafraidofusB.ThefactthatwolvesafraidmenC.ThefactthatwolvesareafraidofmenD.Wolves’afraidofmen4.Theannouncement______allflightwerecancelledbecauseofbadweathergreatlydistressedthewaitingpassengers.A.thatB.whichC.whyD.ofwhich5.Thequestionis______canbeputintopractice.A.howyouhavelearnedB.howwhatyouhavelearnedC.thatwhyyouhavelearnedD.howthatyouhavelearned6.Ahingejointis_______permitstheforwardsandbackwardmovementofadoor.A.thatB.whatC.thoseD.which7.OnereasonwhyHamletissuchasuccessfulplayisthat_______.A.itappealsdifferentlytopeopleB.differentpeopleareappealedC.itappealstomanydifferentpeopleD.peoplefinditappealingtothemverymuch8.Amoreimportantquestionis______theseideasarewellorillfounded.A.whereB.whenC.howD.whether9.Ithinkitis_____youaredoingtoomuch.A.becauseofB.becauseC.becausethatD.becausefor10.Noonecouldunderstand_______.A.thathewastalkingaboutB.whathewastalkingaboutC.hewastalkingaboutD.whichhewastalking11.Iknewnothingabouthisjourney______hewaslikelytobeawayforthreemonths.A.ifB.inthatC.exceptthatD.which12.Thefact______doctorsrecommendthatchildrenwithhypertensiondrinkcoffeeissurprising.A.whatB.isthatC.thatD.of13._______i...
