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SubjectClause主语从句Unit4Grammar0102030405定义引导词形式主语结构语序及时态主谓一致SubjectClause定义找出每个句子中的主语1.Janeisgoodatplayingthepiano.2.Shewentoutinahurry.3.Toseeistobelieve.4.Smokingisbadforhealth.5.Whathehassaidistrue.Tips：（1）主语是句子说明的人或事物，一般放在______.（2）在句子中充当_______的从句就是主语从句。（名词）（代词）（不定式）（动名词）（从句）句首主语1.Thathewillpasstheexamiscertain.2.Whetherhewillpasstheexamisuncertain.3.Whowillgomakesnodifference.4.Whatweneedismoretime.5.WhichbookIshallchoosehasn’tbeendecided.找出下列句子中的主语从句语序和时态e.g.:1.Whenwillhecomeisnotknown.Tips:主语从句一律用陈述语序(主语+谓语)。主语从句的时态受主句的时态影响和限制。→Whenhewillcomeisnotknown.2.Thathefinisheshisworkontimewasagreatsurprisetousall.→Thathefinishedhisworkontime…主语从句的语序、时态引导词9从属连词that,whether；连接代词who,whom,whose,what,which;wh+ever；连接副词when,where,how,why。主语从句的引导词e.g.:Thathewillcomeiscertain.Thattheyarebadlyinneedofhelpisquiteclear.Whetherhewillcomeisuncertain.Tips:_____在从句中不做成分，起连接作用，本身无意义，不能省略但主句内容表肯定。________不做成分，起连接作用，意思是“______”，不能省略但主句意思表不确定。that是否1.从属连词that和whether：whether(1)________hemadeanimportantspeechatthemeetingwastrue.(2)__________we’llgocampingtomorrowdependsontheweather.(3)_________theywillsellthehouseisnotyetdecided.(4)________shecouldcometohelpusmadeusveryhappy.练习：填空-从属连词(that,whether)ThatWhetherThatWhetherWhowillgomakesnodifference.Whatweneedismoretime.WhichbookIshallchoosehasn’tbeendecided.Tips:连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。2.连接代词who,whom,what,which,whosewh+ever词:whatever,whoever,whomever,whichevere.g.:Whoevercomestoourschooliswelcome.Whateverhesaidwasn’ttrue.Whicheverbookyouchooseisyours.Tips:“wh+ever”与“wh-词”的用法一样，只是语意较强，含有“凡是、无论……”之意，泛指任何一个，其引导从句时无疑问意义；而“wh-词”多有疑问意义。练习：填空-连接代词（1）________willhostthemeetinghasn'tbeendecided.（2）___________comestoourschooliswelcome.（3）________sidewillwinisnotclear.（4）__________Ihaveisyours.WhoWhoeverWhichWhatevere.g.:Whenwewillleavehasn’tbeendecided.Howshekeepshealthyisasecret.Whyhecriesisnotclear.Wherethemeetingwillbeheldisnotknown.Tips:连接副词引导主语从句并在从句中作状语。3.连接副词when,where,how,why(1).________hedidn’tcomeyesterdayisstillunknown.(2).______________wewillsetupthefactoryshouldbediscussed.(3).___________thishappenedisnotclear.(4)._____Jacklookedsoexcitedisnotclear.WhyWhy/HowWhen/Where练习：填空-连接副词Why根据主语从句中成分是否缺失和主句意义是否完整来选择相应的引导词。总结如何选择主语从句中引导词：主谓一致主语从句中的主谓一致(1).单个主语从句做主语时，主句谓语动词用单数。e.g.:Whenwewillholdoursportsmeeting_____(have)notbeendecidedyet.(2).由两个或者多个引导词引导单个主语从句时，主句谓语动词用单数。e.g.:Whenandwherewewillholdoursportsmeeting____(have)notbeendecidedyet.hashas(4).和表语一致的情况(3).由and连接两个或两个以上主语从句做主语时，主句谓语动词用复数。e.g.:Whentheywillstartandwheretheywillgo______(have)notbeendecidedyet.have主语从句中的主谓一致e.g.:WhatIwantisthebook.WhatIwantaresomebooks.what引导的从句做主语时，谓语的单复数取决它的________.表语WhatIneed___money.WhatIneed____books.isare形式主语结构→Itiscertainthathewillwinthematch.e.g.:Thathewillwinthematchiscertain.注解：一般来说主语从句都是放在,但有时为了使句子,避免”头重脚轻”,常用作，从而把主语从句放在．句首保持平衡it形式主语后面主语从句中用it作形式主语的结构形式主语Thatwecan’tgotoseethemovieisapity.Itisapitythatwecan’tgotoseethemovie.形式主语主语从句中用it作形式主语的结构(1).It+be+名词＋that从句Itisapitythat…很遗憾…Itisafactthat…事实是…(3).It+be+形容词＋that从句Itisobviousthat……显然...Itisimportantthat….重要的是…(2).It+be+过去分词＋that从句Itissaidthat...据说...Itisknownthat…众所周知…(4).It+不及物动词+thatIthappenedthat...碰巧……Itoccurredtomethat…我突然想起…形式主语常用句型1.______________(是个惊喜)thathechangedhismind.2.______________(据推测)thatshewillcomebacktomorrow.3.______________(有必要)thatweshouldlearnEnglish.ItisasurpriseItispredictedItisnecessary练习主语从句和强调句型的区别：e.g.:1)ItisapitythatMr.Smithcan’tattendthemeeting.2)Itisbetterfoodandmoresunshinethatthepatientneeds.(主语从句）(强调句）强调句型:“Itis（/was）+强调部分+that(/who)…”.判断是否为强调句：去掉Itis（或was）…that（或who）…框架后，剩余部分为一个完整的句子。1.(_____isneededforsuccess)isyourhardwork.2.(__________theywillarrive)hasbeentoldtotheteacher.3.(_____canjoininthesportmeet)isdecidedbytheteacher.4.(________itwillrainornot)isnotclear.6.(______theearthisasolidball)isknowntousall.WhatWhen/HowWhoWhetherThat5.(____theearthisbecomingwarm)isagoodtopicforresearch.Why7.(________leavestheroomlast)oughttoturnoffthelights.8.(__)isourhope(thatthetwosideswillworktowardspeace).WhoeverIt巩固练习Thanks