高中英语学习材料（灿若寒星*制作整理）主语从句概念引入Thatyouwillwinthemedalseemsunlikely.你想获得奖牌看起来是不可能的。Whethersheiscomingornotdoesn’tmattertoomuch.她来不来都无关紧要。WhatIwanttoknowisthis.我想知道的就是这事。Whentheplaneistotakeoffhasnotbeenannounced.飞机何时起飞还没有宣布。语法讲解什么是主语从句？【高清课堂：367100名词性从句（一）主语从句】在复合句中由一个句子作主句的主语的从句叫主语从句。Whatmattersisnotwinningbutparticipating.Idon’tknowwhyheisalwaysfindingfaultwithme.Myhometownisnolongerwhatitusedtobetenyearsago.HeexpressedhishopethathewouldcometoChengduagain.其中划横线的部分就是名词性从句。主语从句引导词：1.由what等代词引导的从句,表示“所⋯⋯的(东西)”，实际上等于一个先行词加上一个定语从句，也可以由-ever等代词引导。比如:Whattheyaretalkingaboutisnothingvaluable.WhatIreallywantistohaveagoodrest.Whatevershedidiswrong.比较：Whatevershedid,sheiswrong.Whoeverpassestheexamcanget50yuan.比较：Whoeverpassestheexam,Iwillgivehim50yuan.比较：Whopassestheexamisstillnotclear.2.由that引导的主语从句,通常用形式主语it来代替。Thathehasdisappearedworrieshisparents.Itworrieshisparentsthathehasdisappeared.Itisnotlikelythathecanwinthelottery.Itisabigsurprisethatheisstillalive.3.由连接代词、连接副词或whether引导的从句。Whenshewillbebackisstillaquestion.Wheretheyhadputthefilestroubledthespy.Whetherhewilltakepartintheplayisunclear.WhetherornothewillgotoJapanisuptoher.在下面5种情况下，只能用whether表示“是否”：1)Whetherhewillcomeherestillneedstotalkabout.Itisnotclearwhetherhewillcomehere.2)Iamnotsurewhetherornothewillcomeherenextweek.Nobodyknowswhetherthesingerwillcomeoutornot.引导主语从句的连接词有三类：(1)连词that、whether:(从属连词）在从句中不作任何成分Whetherwegobytrainorbyboatmakesnodifference.Whetherhe’llcomehereisn’tclear.Thatpricewillgoupiscertain.Whetherwecangotopicnictomorrowisstillaquestion.Thatthewoundedsoldierisstillaliveisawonder.ThatMr.Zhouwillcomeiscertain.Whethertheworkcanbecompletedontimeisdoubtful.(2)连接代词what,who,whom,whose,which,whoever,whatever,whichever等.连接代词在从句中充当主语，宾语,表语或定语，不能省略。Whatshedidisnotyetknown.Whowillwritethepoemhasnotbeendecidedyet.Whateverhedidisright.Whoeverbreakstheruleshouldbepunished.Whowillgomakesnodifference.Whomshelovesisclearenough.她爱的是谁已经够清楚了。Whosewalletwasstolenmustbemadeclear.谁的钱包被偷了必须被搞清楚。（3)连接副词when,where,why,how,whenever,wherever,however等。它们在句中充当状语，不能省略。此类主语从句也可以用带有形式主语it的句子转换。Howthishappenedisnotcleartoanyone.Whenhewillbebackdependsontheweather.Howthepyramidswerebuiltisstillamystery.主语从句后置:为了避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语.例:thatweshallbelateiscertain.--It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.2.Thatyoumissedthechanceisapity.用it作形式主语的结构A.It+系动词+形容词(obvious,true,natural,surprising,good,wonderful,funny,possible,likely,unlikely,certain,probable,necessary,right,wrong,important,certain,clear,strange，etc.)+that从句。如：Itiscertainthatshewilldowellinherexam.B.It+系动词+名词词组+that从句(nowonder,nowonder,anhonor,agoodthing,apity,nosurprise,ashame,goodnews,afact,etc.)+that从句。如：It’snowonderthatyouhaveachievedsomuchsuccess.真可惜你没出席昨天的讲座。It’sapitythatyoudidn’tattendthelectureyesterdayC.It+be+过去分词(said,told,reported,though...
