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1名词性从句专项复习主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词因此，这四种从句通称为名词性从句。引导名词性从句的连接词可分为三类：连接词that，whether,if（不充当从句的任何成分）连接代词：what,whatever,who,whoever,whom,whose,which.连接副词：when,where,how,why名词性从句连接词的选用(一)that和what的选用：that和what都可引导所有的名词从句。但是，what除起连接作用外，还在名词性从句中充当成分，可做从句的主语、宾语、或表语。而that在名词性从句中不充当任何成分，只起连接作用。that/what1.______hewantsisabook.2.______hewantstogothereisobvious.3.Theresultis______wewonthegame.4.Thisis_____wewanttoknow.5.Is_____hetoldustrue?6.Weshouldpayattentionto______theteacherissaying.7.Ihavenodoubt_____hewillcome.8.Ihavenoidea_____hedidthatafternoon.(二）if和whether的选用不能使用if的情况：a.主语从句b.表语从句c.同位语从句d.介词后的宾语从句e.whethertodo做动词宾语不能用iftodo.f.whetherornot连在一起引导宾语从句时不用if.1.Iaskedher__________shehadabike.2.______wewillholdapartyintheopenairtomorrowdependsontheweather.3.We’reworriedabout________heissafe.4.Idon’tknow___________heiswellornot.5.Idon’tknow________ornotheiswell.6.Thequestionis_________heshoulddoit.7.Thedoctorcanhardlyanswerthequestion______theoldmanwillrecoversoon.8.Idon’tknow_______togo.（三）其它连接代词和副词的连用主要根据名词性从句中的具体意义,正确的选择who、which、when、where、why、how等连接词，这些连接词既具有疑问含义，又起连接作用，同时在从句中充当各种成分。我们何时举行运动会还没有决定。________weshallholdoursportsmeetingisnotdecided.我不知道昨天谁打破了玻璃。2Idon’tknow_________broketheglassyesterday.我不知道他长的什么样子。Ihavenoidea_________helookslike.这就是我忘记眼镜的地方。Thisis_________Ileftmyglasses.（四）引导词that的省略that可省略的情况：单个宾语从句中的that可省略that不可省略的情况：a.主语从句b.表语从句c.同位语从句d.用it做形式宾语的宾语从句e.并列的宾语从句中的后几个从句的,引导词that不能省略1.Idon’tthink________sheiscoming.2.Itisapity________hehasmadesuchamistake.3.Thereasonis_________heiscareless.4.Thenews________ourteamwonthematchinspiredus.5.Idon’tthinkitnecessary_________youshouldreadEnglishaloud.6.Hetoldme__________hisfatherhaddiedand__________hehadtomakealivingalone.五、同位语从句的引导和辨别1.同位语从句的格式：n.+连接词+从句2.能接同位语从句的名词有：fact、idea,news,information,order,belief,suggestion,advice等.3.连接词通常是that,也可根据含义选用whether,what,when,where等来引导同位语从句.1.Ihavenoidea_________hecomesfrom.2.Hecan’tanswerthequestion________hegotthemoney.3.Hegaveusmanysuggestions________weshouldgetupearlierandtakemoreexercise.4.Ihavenodoubt________hewillwin.5.Ihavesomedoubt________hewillwin.（六）同位语从句和定语从句的区别1.定语从句是先行词的修饰语，它不涉及先行词的具体内容。定语从句中that不但起连接作用，而且在定语从句中充当一个句子成分，充当从句的宾语成分时可省略。2.同位语从句对中心词的内容作进一步的解释和说明，表明中心词的具体内容。引导同位语从句的that在同位语从句中不做任何成分,只起连接作用,无具体含义,且不可省略.1.Weexpressedthehopethattheyhadexpressed.2.WeexpressedthehopethattheywouldcometoChinaagain.1.Theinformationhasbeenannouncedthatmoremiddleschoolgraduateswillbeadmittedinto3university.2.Theinformationthatherevealedatthemeetingisofgreatvalue.（七）名词demand,suggestion,proposal,advice等词后的同位语从句的语气要用虚拟语气,结构为should+do,should可省略HegavemeasuggestionthatI(should)becalmnow.(八）宾语从句的时态呼应1.如果主句时态是现在时或将来时,从句谓语可根据句意需要而选用任一种时态.a.他相信他的梦想总有一天会实现的.Hebelieves_________________________.b.请告诉我你昨天这个时候在干什么.Pleasetellme_________________________.Practice:1.Itnowappears______theyareinneedofhelp.A.thatB.whichC.whatD.how2.Itisgoodnews______theywillarriveinafewdays.A.whichB.whatC.thatD.how3.Thisis______shewasborn.A.whereB.whichC.thatD.what4.Thequestionis______wecan’tgotheretoday.A.thatB.whatC.whichD.when5.Thequestionis______itisworthdoing.A.ifB.whetherC.whichD.what6.Thereasonhehasmadesuchgreatprogressis_______hehasneverwastedhistime.A.becauseB.whyC.thatD.what7.Mysuggestionis______weshouldturnthelandintoricefields.A.whatB.thatC.whichD.where8.Hisproposalisthatthedam______atthefootofthemountain.A.buildB.willbuildC.bebuiltD.willbebuilt9.Weallknowthetruth_____theearthgoesroundthesun.A.thatB.whichC.whatD.whether10.Weheardthenews______ourteamhadwon.A.whichB.thatC.whatD.where11.Theproblem______itisrightorwronghasnotyetbeendecided.A.whichB.thatC.whetherD.if12.Youmustdowell______theteacherasksyoutodo.A.whichB.whatC.thatD.where提高题1.acertaindoubtamongthepeopleastothepracticalvalueoftheproject.4A.IthasB.TheyhaveC.ItremainsD.Thereremains2.Sheisverydeartous.Wehavebeenpreparedtodoittakestosaveherlife.A.whicheverB.howeverC.whateverD.whoever3.Thefacthasworriedmanyscientists______theearthisbecomingwarmerandwarmertheseyears.A.whatB.whichC.thatD.though4.CouldIspeaktoisinchargeofInternationalSalesplease?A.whoB.whatC.whoeverD.whatever5.Thebow-tobookcanbeofhelptowantstodothejob.A.whoB.whomeverC.nomatterwhoD.whoever6.Oneofthemostimportantquestionstheyhadtoconsiderwasofpublichealth.A.whatB.thisC.thatD.which7.Asanewdiplomat,heoftenthinksofhecanreactmoreappropriatelyonsuchoccasions.A.whatB.whichC.thatD.how8.Newscamefromtheschooloffice_______WangLinhadbeenadmittedtoBeijingUniversity.A.whichB.whatC.thatD.where9.Itisobvioustothestudents______theyshouldgetwellpreparedfortheirfuture.A.asB.whichC.whetherD.that10.——Isthereanypossibility______youcouldpickmeupattheairport?——Noproblem.A.whenB.thatC.whetherD.what11.Weshouldconsiderthestudents’request___theschoollibraryprovidemorebooksonpopularscience.A.thatB.whenC.whichD.where12.ManyyoungpeopleintheWestareexpectedtoleave______couldbelife’smostimportantdecision—marriage—almostentirelyuptoluck.A.asB.thatC.whichD.what13.Thelittlegirlwhogotlostdecidedtoremain_________shewasandwaitforhermother.A.whereB.whatC