主语从句精品课件

{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。Thesubjectclause主语从句主语从句+谓语主语从句的句序：it（形主）+that（真主）1Thathewillcomeiscertain.2Whetheritwillpleasethemisnoteasytosay.3Whatseemseasytosomepeopleseemsdifficulttoothers.4Whichsidewillwinisnotclear.5Whyhediditremainsamystery.6Whentheywillstartisnotknownyet.7Howhebecameagreatscientistisknowntousall.8Whowilltakepartinthemeetinghasnotbeendecided.9Whoeverbreaksthelawwillbepunished.10Wheresheisfromisunknown.Findthesubjectclausesinthefollowingsentences,andthinkaboutwhataretheconnectors(连接词).•主语从句的引导词：•连词that,whether•连接代词who(ever),whom(ever),•which(ever),what(ever)•连接副词where,when,why,howWhat与that引导主语从句规则：what引导名词性从句时在从句中充当句子成分,如主语,宾语,表语,而that则不然,它在句子中只起连接作用，但不能省略。(1)_____yousaidyesterdayisright.(2)_____sheisstillaliveisagreatnewstoallofus.WhatThat主语从句的规则：注意:由that引导的主语从句有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面。例如:1.Thathewillrefusethispieceofadviceisimpossible.______________________________________________________________________________2.Thattheyshouldlikeeachotherisnatural._____________________________________*it为形式主语Itisnaturalthattheyshouldlikeeachother.Itisimpossiblethathewillrefusethispieceofadvice.这样就构成了下面一些常用句型:1)Itis+n.+从句Itisapity/shamethat...遗憾的是……Itisasurprisethat…令人惊奇的是…Itisafactthat……是事实Itiscommonknowledgethat……是常识*_______________(很遗憾)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat2)Itis+adj.+从句It’scertainthat…肯定…Itispossiblethat...很可能……Itisunlikelythat...不可能……Itisobviousthat…很明显…Itisnecessary\important\natural\...that…*_________________(很可能)shewillcomebacktomorrow.*_________________(很明显)thismeasureiseffective.+(should)+do…ItispossiblethatItisobviousthat.Itwasnotclearwhetherthesolidshapewouldlastornot.SubjectClauseSubjectFormedSubjectWhetherthesolidshapewouldlastornotwasnotclear.Real引导主语从句在句首只能用whether,有it作形式主语的whether/if都可以.Conclusion:ifIf×主语从句的规则：例3.Whenhewillcomeareapuzzle.正：Whenhewillcomeisapuzzle.规则四:含主语从句的主句谓语动词多用单数第三人称形式。主语从句的规则：找出下列句子中的错误，并总结规律例1.Whenwillhecomeisnotknown.规则一:主语从句一律用陈述语序，即主语在前，谓语在后。正：Whenhewillcomeisnotknown.2.Wherewillhegoisnotyetfixed.正：Wherehewillgoisnotyetfixed.3.WhywasLilylateisnotimportant.正：WhyLilywaslateisnotimportant.主语从句的规则：1.Whatheneedsisthatbook.2.Whatheneedsaresomebooks.规则四:what引导的主语从句，可根据表语决定主句动词的单复数形式。（what用法较特殊，需要记住。）Consolidation------学法指导依据“缺什么补什么”原则确定正确的连词。所谓“缺什么补什么”是指从句与连词之间的关系。如果句子中缺主语，指人用who，指物用what；如缺宾语，指人用whom，指物用what；如缺时间状语用when；地点状语用where；原因状语用why；方式状语用how；定语用what或which；什么都不缺用that。Wether表“是否”。1.用that/whether/if//where/how/when/why/who/what/which/howmuch/etc.来连接主语从句.Summary:SubjectClause3.引导主语从句在句首只能用whether,有it作形式主语的whether/if都可以.2.That在主语从句中不能省略.4.有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面.4种句型。5.主语从句作主语时，谓语动词一般用单数形式。1.Whatyouleftareonlyseveraloldbooks.2.Whatyousaidisofgreatimportance.6）主语从句中用陈述语序,7）“what”引导主语从句时，谓语动词：常与其后的名词作表语一致，且根据句子的语境而定。eg：8).用于Itisimportant/natural/necessary/impossiblethat...句型中,主语从句应使用虚拟语气,用“should+动词原形”的形式,should有时可以省略。9).在It+be+suggested/advised/ordered/requested/insisted/required中,that从句的谓语也应该用“should+动词原形”的形式,should有时可以省略。Thankyou!Good-bye!