名师原创：Unit5 单元语法详解课件

Unit5Workingtheland

单元语法详解人教版新教材选择性必修一

原创Cao

本单元重要语法

→主语从句◆原句再现However,whatconcernedhimmostwasthatfarmersoftenhadpoorharvestsandsometimesevenhadaseriousshortage…(教材P50)b.Howthiscouldbedonewasachallengingquestionatthetime.(教材

P50)c.However,whetheritwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.(教材

P50)d.Today,itisestimatedthatabout60percentofdomesticriceconsumptioninChinaiscomprisedofcropsgeneratedfromYuan’shybridstrains,…..(教材

P50)e.WhatimpressespeoplemostaboutYuanLongpingishisongoingabilitytofulfilhisdreams.

(教材

P51)f.ItissurprisedthewholeworldthatYuanLongpinghadrealizedhisdreamofdevelopingseawaterrice.(教材P53)◆主语从句的概念●主语从句在复合句中作主句的主语。它可以放在主句谓语动词之前，但多数情由it作形式主语，而把主语从句放在主句之后，请观察下面的句子Itiscommonknowledgethatthewhaleisnotafish.

鲸不是鱼，这是常识。(这里，it为形式主语,真正的主语是后面的主语从句thatthewhaleisnotafish.◆主语从句的表现形式

●由从属连词whether和that引导的主语从句,请观察以下句子a.Thattheearthturnsaroundthesunisknowntoall.地球绕着太阳转这一点是众所周知的.a.Whetherhewillcomeornotisnotyetknown.他是否要来还不知道。b.Whethertheywouldbeinformedornotwasnotdecided.是否会通知他们还没决定。※悄悄告诉你：that虽然在其引导的主语从句中无实际意义，也不充当句子成分，但不可省略；whether意思是“是否”，在句中不充当句子成分●

由连接代词who,whoever,what,whatever,which,whichever引导的主语从句，请观察以下句子a.Whowillcometodinnerhasbeendecided.谁来吃饭已经定了。b.Whatweneedaremorebooks.我们所需要的是更多的书。c.Whateverhesaidheremustbekeptsecret.他在此所说的一切必须保密。d.Whoeverisheregetsaprize.不管谁来，都能获得奖。e.Whichbookswillbetakentothevillagehasnotbeendecided.哪些书本要运往那个村子还没有决定。f.Whichevergoodsaresoldshouldbecheckedaheadoftime.凡是出售的货物都要提前检查。●

由连接副词when,where,why,how,whenever,wherever,however引导的主语从句，请观察以下句子a.Whenwewillhaveameetingisn'tknowntous.我们并不知道什么时候开会。b.Whyhefailedthephysicsexamwasn'tclear.他为什么没通过物理考试还不清楚。c.Wherehehasbeenisstillapuzzle.他曾去过什么地方仍是个谜。d.Howhewillcomeisnotclear.他将怎样来还不太清楚。e.Howmanypeoplewillcomeisunknown.有多少人会来还不清楚。●引导词it指代主语从句由于主语从句位于句首，句子常显得笨重，因此常把它移至句子后部，句首用引导词it作形式主语。常有这几种主要形式※

Itis+名词+that…..Itisapitythat...遗憾的是…Itisashamethat...可耻的是…Itisawonderthat..令人惊讶的是....Itisnowondertat...毫无疑问是…Itisaquestionthat..问题是….Itisafactthat..事实是..请观察以下句子a.Itisapitythatshehasmadesuchafoolishmistake.真遗憾，她犯下这样愚蠢的错误。b.Itisnowonderthatheshouldhavepassedtheexam.难怪他通过了这次考试。c.Itisashamethathecheatedinthefinalexamyesterday.可耻的是他在昨天的期末考试中作弊了※Itis+形容词+that….

Itistruethat...“….是真实的Itisclearthat….…是很清楚的Itiswell-knownthat....….是众所周知的Itislikelythat...…是可能的Itisobviousthat...….是明显的Itis(im)possiblethat…….是(不)可能的Itisrightthat....….是正确的Itisnecessarythat...….是必要的请观察以下句子a.Itwasclearthatshehaddonewell.

很明显，她做的很好。b.Itisquiteobviousthathedidn'tdoithimself.显然他没有亲自去做。c.Itislikelythathewillgoabroad.他可能出国。d.Itiswellknownthatsheisafamousscientist.众所周知，她是个著名的科学家。e.Itisnecessarythatthestudentsshouldgotothecountrysideforsometrainingandpractice.学生们去乡下进行一些锻炼和实践是必要的※

Itis+过去分词+从句Itisestimatedthat….据估计….Itisreportedthat….据报道….Itissaidthat…据说….Itisprovedthat……被证明…Itisbelievedthat….据信…..a.It'ssaidthattherewasnobias.据说那里没有偏见。b.It'sreportedthat20peoplewerekilledinthetrafficaccident.

据报道，那次交通事故中有20人丧命。c.Itishopedthattheywillallpassthedrivingtestthistime.希望他们这次都通过驾驶考试。d.Itisestimatedthatabout30peoplewereinjuredintheaccident.据估计，大约有30人在这次事故中受伤。Itisthoughtthat...据认为….Itisexpectedthat....预期....Itisannouncedthat...据宣布….Itishopedthat...希望…请观察以下句子

※

It+动词+从句

Itdoesn'tmatterif/whether….…..没关系Itappearsthat….看来好像.....Itseemsthat...看来似乎....Ithappens/happenedthat…..碰巧Itmakesnodifferencethat….….无区别请观察以下句子a.Itdoesn'tmatterwhetherhewillcomeornot.

他来不来都没有什么关系。b.Itseemsthatourbasketballteamwillwinthematch.看来我们的篮球队将赢得那场比赛。c.IthappenedthatIdidn'ttakeanymoneywithme.我碰巧身上没带钱。◆考点训练1.________makesmistakesmustcorrectthem.

A.WhatB.ThatC.WhoeverD.Whatever2.Itworriedherabit_________herhairwasturninggrey.

A.whileB.thatC.ifD.for3.Whenandwhyhecamehere________yet.

A.isnotknownB.arenotknown

C.hasnotknownD.havenotknown4.________isnoreasonfordismissingher.

A.Becauseshewasafewminuteslate

B.Owingtoafewminuteslate

C.Thefactthatshewasafewminuteslate

D.BeingafewminuteslateCBAC5.________Tomlikedtoeatwasdifferentfrom________.

A.That…thatyouhadexpected

B.What…thatyouhadexpected

C.That…whatyouhadexpected

D.What…whatyouhadexpected6.________wegoswimmingeveryday________usalotofgood.

A.If...doB.That...doC.If...doesD.That...does7.It________Bobdrivesbadly.

A.thinksthatB.isthoughtwhatC.thoughtthatD.isthoughtthat8.It'suncertain________theexperimentisworthdoing.

A.ifB.thatC.whetherD.how9.________theboydidn'ttakemedicinemadehismotherangry.

A.ThatB.WhatC.HowD.WhichDDDCA10._______wecan'tgetseemsbetterthan____wehave.

A.What,whatB.What,thatC.That,thatD.That,what11._______youdon'tlikehimisnoneofmybusiness.

A.WhatB.WhoC.ThatD.Whether12._______we'llgocampingtomorrowdependsontheweather.

A.IfB.WhetherC.ThatD.Where13._________isgoingtodothejobwillbedecidedbythePartycommittee.

A.ThatB.WhyC.HowD.Who14._______we'llfinishtranslatingthebookdependsonthetime.

A.WhenB.WhyC.WhatD.That15.________hewon'tgothereiscleartoallofus.

A.WhereB.W