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{Hisjobisimportant.Whathedoesisimportant.主语从句的定义：主语在句中充当主语的从句叫做主语从句。导SubjectClauses主语从句•1.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.•2....itwasnotclearwhethertheshapewouldlastornot.•3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.•4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.•5.Whatmanyscientistbelieveisthatthecontinuedpresenceofwater...•6.Whytheysuddenlydisappearedstillremainsamystery.•7.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.Task1:Findthesentenceswhicharesubjectclauseinthereadingpassage,thenunderlinethesubjectclauses.思•从属连词that,whether，if•连接代词who(ever),whom(ever),which(ever),what(ever)，whose•连接副词where,when,why,howTask2：主语从句的引导词：考点一：连接词的选用[活学活用]①______weunderstandthingshasalottodowithwhatwefeel.【2015·北京】A.WhereB.HowC.WhyD.When②_____we'llgocampingtomorrowdependsontheweather.A.IfB.WhetherC.ThatD.Where③______we'llgocampingtomorrowhaskeptusallexcitedthewholeday.A.IfB.WhetherC.ThatD.Where④______makesmistakesmustcorrectthem.A.WhatB.ThatC.WhoeverD.Whatever议、展、评BCCB考点二：it作形式主语(1)It的用处：为了避免主语冗长和句子________,经常用it作________,主语从句放在____作真正的主语。Eg:Thathewillrefusethispieceofadviceisimpossible.（用it做形式主语改写句子）Itisimpossiblethathewillrefusethispieceofadvice.头重脚轻形式主语句末•①It+be+__________+that从句(obvious,true,natural,surprising,wonderful,possible,likely,certain,probable)•Eg:显然他撒谎了。________________________________________•特别注意：Itisimportant/natural/necessary/impossible/unbelievable/incredible/strangethat...句型中,主语从句应使用________语气,即用“(_______)+动词原形”的形式。•Eg:我们学好英语是必要的.____________________________________________(2)it作形式主语常见的结构形容词Itwasobviousthathetoldalie.虚拟shouldItwasnecessarythatwe(should)learnEnglishwell.②It+be+___________+that从句•(nowonder,anhonor,agoodthing,apity,nosurprise,etc.).•Eg:他很懒.。难怪他这次考试不及格。_________________________________________________名词或名词词组Heisverylazy.Itwasnowonderthathefailedintheexam.③It+be+__________+that从句(said,reported,thought,expected,decided,announced,arranged,etc.).Eg:据报道，有五个人被埋在废墟中。_______________________________________________________________特别注意:在It+be+suggested/advised/ordered/requested/insisted/required/demanded中,that从句的谓语也应该用_____语气,即用“(_______)+动词原形”的形式。Eg:人们建议应该采取更多措施来保护环境。____________________________________________________________________________过去分词V-edItwasreportedthatfivepeoplewereburiedintheruins.虚拟shouldItissuggestedthatmoremeasures(should)betakentoprotectourenvironment.④It+__________+(连接词不固定)从句（seem/happen/appear/matter/turnout/occurto/makesnodifference等）Eg:你今天来或者明天来都没关系。_______________________________________________不及物动词及短语Itdoesn'tmatterwhetheryoucometodayortomorrow.⑤It+______+_____+that从句Eg,Itsurprised/amazedmethatheshouldtalktohisteacherinsucharudemanner.(此处should表？)vt.(及物动词)O.(宾语)考点三：主从的语序陈述语序即__________________【活学活用]】①____________（他什么时候会来）isnotknown.②WhywasLilylateisnotimportant.（改错）连接词+主语+谓语+其它WhenhewillcomeLilywas★注意问题:(1)区分what和that•_____yousaidyesterdayisright.•_____sheisstillaliveisagreatnewstoallofus.•总结：what在从句中_____成分，如__________；that在从句中_____成分,只起____作用____意义___省略。ThatWhat无连接不充当主、宾、表充当不可(2)if与whether_______hewillgotoBeijingornotwasnotclear.Itwasnotclear__________hewillgotoBeijing.总结:如果whether从句位于_____，或者与_____连用时，不能用if替换如果句中借用了_____作形式主语，引导词可以用______替换whether。Whether/ifWhether句首ornotitif(3)主谓一致Whenhewillcome_______(be)apuzzle.Whentheywillstartandwheretheywillgo______(be)decidedsofar.Whenandwheretheywillgo_____(be)decidedsofar.Whatheneeds____thatbook.Whatheneeds____somebooks.areisisareis总结：①从句作主语时，谓语动词多用______形式。②如果由and连接两个或两个以上的主语从句作主语时，谓语动词用______形式；由两个或多个连接词引导一个主语从句时，谓语动词用________③what引导的主语从句，主句动词的单复数形式由________决定.（what用法较特殊)单数单数复数表语检1.__________hedidn'tattendthemeetingyesterdaywasn'tquiteclear.2.__________teamwillwinthematchisstillunknown.3.___________comestothepartywillreceiveapresent.4.It'sreported___________threepeoplewerekilledintheaccident5._____________hesolvedtheproblemsuccessfullyinterestedallofus.6.____________istobesenttheretosolvetheproblemhasn'tbeendecided.I.用适当的连接词填空，使句子意思完整。WhyWhichWhoeverthatHowWho/whatII.下列各句中均有一处错误，请改正。1.Thattheoldman'ssonwantedtoknowwaswherethegoldhadbeenhidden.2.Whetherthe2008OlympicGameswillbeheldinBeijingexcitedthewholenation.3.Whateverleavestheroomlastoughttoturnoffthelights.4.Howourspringsportsmeetwillbeheldornotthisweekisnotknownyet.WhatWhetherWhoeverThat5.It'sstrangewhenheshouldhavegoneawaywithouttellingus.6.Whenandwherethemeetingwillbeheldstillremainaquestion.7.Itwasrequestedthateveryonemadeaspeechatthemeeting.remainsmakethatIII单项选择1._________hashelpedtosavethedrowninggirlisworthpraising.A.WhoB.TheoneC.AnyoneD.Whoever2.Itwas________hesaid________disappointedme.A.what;thatB.that;thatC.what;whatD.that;what3.________wasthathecouldgobacktohishometown.A.ThatreallyexcitedhimB.WhatreallyexcitedhimC.WhichreallyexcitedhimD.Thatexcitedhimreally4._______hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD.How5.Itworriedherabit______herhairwasturninggr