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名词性从句用法讲解与专项练习题及答案名词性从句包括主语从句、宾语从句、表语从句和同位语从句。高考常从连接词的选择、语序、语气、时态等方面来考查。名词性从句中的连接词有连词that/whether/asif，连接代词what/who/which/whose/whatever/whoever/whomever/whichever，连接副词where/when/why/how/wherever/whenever。第1讲引导名词性从句的连接词考点1.引导名词性从句的连接词有哪些有学生认为，引导同位语从句只能用that,这句话对吗？先看下面几个句子。①Ihavenoquestionthathewillcome.②Ihaveaquestionwhetherhewillcome③Ihaveaquestionwhenhewillcome.我们可以看出：上面三个句子中question后面都是同位语从句，都是说明question的内容的。在句①中，同位语从句的原句是陈述句，由that引导；在句②中，原句是一般疑问句，由whether引导；在句③中，同位语从句的原句是特殊疑问句，特殊疑问词也起着连接作用。其实，所有名词性从句的连接词都有上面的三种情况。宾语从句：Idon’tknowthathewillcome.Idon’tknowwhether/ifhewillcome.Idon’tknowwhenhewillcome.表语从句：WhatIdon’tknowisthathewillcome.WhatIdon’tknowiswhetherhewillcome.WhatIdon’tknowiswhenhewillcome.主语从句Thathewillcomeisobvious.Whetherhewillcomeisn’tknownyet.Whenhewillcomeisn’tknownyet.1.【2010浙江】Itisuncertain______sideeffectthemedicinewillbringabout,althoughabouttwothousandpatientshavetakenit.A.thatB.whatC.howD.whether2.【2012全国新课标】Itisbynomeansclear______thepresidentcandotoendthestrike.A.howB.whichC.thatD.what3.【2012山东】Itdoesn’tmatter______youpaybycashorcreditcardinthisstore.A.howB.whetherC.whatD.why4.【2013陕西】Itremainstobeseen______thenewlyformedcommittee’spolicycanbeputintopractice.A.thatB.whichC.whatD.whether5.【2009天津】Itisobvioustothestudents______theyshouldgetwellpreparedfortheirfuture.A.asB.whichC.whetherD.that6.【2012江西】Itsuddenlyoccurredtohim______hehadlefthiskeysintheoffice.A.whetherB.whereC.whichD.that考点2.引导词that的省略问题主语从句、表语从句、同位语从句中连词that不能省略。ThattheyaregoodatEnglishisknowntousall.Theproblemisthatwedon’thaveenoughmoney.SheexpressedherhopethattheywouldcometoChinaoneday.只有宾语从句中的连接词that可省略，但在以下几种情况中that也不能省略：A.当that从句和主句谓语动词之间有插入词语或者从句主语之间有插入语时，that不可省略。Hejudgedthat,becausehewasachild,hedidnotunderstand.B.当两个名词性从句并列作宾语时，后面的that不能省。Everyoneknewwhathappenedandthatshewasworried.C.当that作介词宾语时，that不可省掉。Thereasonliesinthatsheworksharderthantheothersdo.7.______weneedmorepracticeisquiteclear.A.WhenB.WhatC.ThatD./8.______fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspect.A.WhatB.ThatC.ThisD.Which9.【2010上海】Onereasonforherpreferenceforcitylifeis______shecanhaveeasyaccesstoplaceslikeshopsandrestaurants.A.thatB.howC.whatD.why10.ThereasonwhyIdidn’tgotoShanghaiwas______anewjob.A.becauseIgotB.becauseofgettingC.IgotD.thatIgot11.【2011全国I】Thenextthinghesawwassmoke______frombehindthehouse.A.roseB.risingC.toriseD.risen12.Havingcheckedthedoorswereclosed,and______allthelightswereoff,theboyopenedthedoortohisbedroom.A.whyB.thatC.whenD.where13.Iknownothingabouttheyounglady—______sheisfromBeijing.A.exceptB.exceptforC.exceptthatD.besides14.Humanbeingsaredifferentfromanimals___theycanuselanguageasatooltocommunicate.A.forthatB.inthatC.inwhichD.forwhich(如果不理解本题，可以参看P.错误!未定义书签。错误!未找到引用源。)考点3.whether与if引导名词性从句时的区别A.在主语从句、表语从句、同位语从句中只能用whether,不能用if。Whetherthemeetingwillbeputoffhasnotbeendecidedyet.Thequestioniswhethertheyhavesomuchmoney.Weoughttodiscusscarefullythequestionwhetherwecandoitornot.B.在宾语从句中whether和if可以互换，但：i.作介词宾语时连接词一般用whether。如：Italldependsonwhethertheywillcomeback.ii.后面直接跟ornot时用whether。如：Ididn’tknowwhetherornothehadarrivedinWuhan.C.whether也可与动词不定式连用，但if不能。Ihavenotdecidedwhethertogoornot.D.whether常与or连用表示一种选择，if不能这样用：Thequestionofwhethertheyaremaleorfemaleisnotimportant.E.whether可引导一个让步状语从句表示“不管”、“无论”，而if不能。如：Whetherhecomesornot,wewillbeginourpartyontime.F.discuss后通常用whether。15.______youcansucceedintheendwillmainlydependon______youdoand______youdoit.A.If;what;whyB.Whether;what;howC.Whether;how;whyD.That;whether;how16.【2009上海】Itisnotimmediatelyclear______thefinancialcrisiswillsoonbeover.A.sinceB.whatC.whenD.whether17.Theydiscussed______theycouldsettletheproblemwithoutothers’help.A.ifB.thatC.whatD.whether18.Whatthedoctorisuncertainaboutis______mymotherwillrecoverfromtheseriousdiseasesoon.A.whenB.howC.whetherD.why19.Mr.Hopkinshasnotyetansweredmyquestion______Icangowithhimto______hecallstheUndergroundTreasureHousenextweek.A.that;whichB.that;whereC.whether;thatD.whether;what20.Ihavenoidea______ornothehasfinishedthework.A.ifB.thatC.whetherD.which考点4.question与doubt后跟同位语从句时的连接词问题doubt，question用于肯定结构时，后面用whether引导名词性从句；用于否定结构或疑问结构时，后面用that引导名词性从句。besure用于肯定句或疑问句时，后接that引导的名词性从句；用于否定句时，后接whether/if引导的名词性从句。21.Ihavenoquestion______hewillsucceed.A.whetherB.thatC.whenD.how22.ThenIhadaquestion______aspore（孢子）couldquicklygetaroundandformmould(霉菌).A.whyB.thatC.thathowD.if23.Thequestioncameupatthemeeting______wehadenoughmoneyforourresearch.A.thatB.whatC.whichD.whether24.Idon’tdoubt______he’llcome.A.thatB.ifC.whatD.whether25.Afterthreedays’waiting,therewasalittledoubtinthemother’smind______thepolicecouldfindherlostchild.A.howB.thatC.whereD.whether考点5.名词性从句是复合句时，不要忘了带that(双连接词)改错:①Thequestionwasthatwhetherhecouldgetajobatthecenter.②Youhavenoideathathowbusywewerethosedays.③Itiswellknownwhatapersoneatscauseschangesinthebody.答案及解析：①去掉that,。后面whether本身就起着连接作用。②去掉that。who,how,when,what等本身就有两个作用：作从句的成分；起连接作用。③在what前面加that。what只是把主语从句的两个分句连接起来，但其作为一个整体来作主语从句时还需要用that引导。26.Fathermadeapromise______Ipassedtheexamhewould