Unit1FacevaluesUsinglanguageGrammar主语从句课件高二英语外研版（2019）选择性

Unit1FacevaluesUsinglanguage(Subjectclauses)Pleasecirclethesubjectofeachsentence.Iseeacat,amirrorandalion.WhatIseeisacat,amirrorandalion.Howitlooksontheoutsideistotallydifferentfromwhat’sinside.Thatwecan’tjudgeabookbyitscoverisreallytrue.Itistruethatweneedtoacceptourselves.Ifasentenceservesasthesubject,wecallitsubjectclause.主语从句Meaningofsubjectclause在复合句中用作主语的从句叫作主语从句。主语从句可直接放在句首，也可用it作形式主语，而将主语从句后置。1.that引导的主语从句用于陈述一个事实或看法，由原来的陈述句充当。that在从句中不作成分，也没有实际词汇意义that引导主语从句时一般不可以省略Formsofsubjectclausethat引导的主语从句位于句首Thatlighttravelsfasterthansoundintheairistrue.Thatyoudidn’tattendthatlectureyesterdayisnoneofmybusiness.形式主语it代替主语从句主语从句可以用it代替，真正的主语从句后置，以保持句子匀称。ItisobviousthatTomlookshappytoday.Itisreportedthattheexperimentwasasuccess.常见的it作形式主语的句式主要由以下几种（1）Itbe+形容词+that从句常见形容词：necessary,right,likely,unlikely,certain,clear,obvious,strange,possible等注意：在“Itisnecessary/important/strange/natural…+that从句”中，从句谓语常用“should+动词原形”结构，其中should可以省略Itisimportantandnecessarythatone(should)mastertheskillsofoperatingcomputers.（2）Itbe+名词+that从句Itisapitythatyoudidn’tgowithus.常用于这种句型的名词（词组）有：apity一会,ashame遗憾、耻辱,goodnews好消息,afact事实,awonder奇迹,nowonder难怪,nosurprise不奇怪（3）Itbe+过去分词+that从句Itissaidthattheuglyducklingturnedouttobeaswan.常见的这种结构：Itissaidthat据说itisheardthat听说itisreportedthat据报道Itisthoughtthat有人认为itisannouncedthat据宣布itisbelievedthat有人认为

在Itissuggested/advised/ordered/requested/insisted/required/decided..that从句中，谓语动词用（should）+动词原形（4）It+特定动词+that从句Itseemstomethatyouobjecttotheplan.在我看来，你似乎反对这个计划。IthappenedthatshewasoutwhenIvisited.我拜访时她碰巧不在家。Itoccurredtomethathemightlendusahand.我突然想起他或许会帮忙。Itreallymattersthatshehasn’tturnedup.她还没来，这的确很关键2.whether引导的主语从句表达疑问概念，由原来的一般疑问句充当。whether表示“是否”,有实际词汇意义，不可以省略whether引导的主语从句常位于句首，也可以用形式主语it,把真正主语后置Whetherwewillattendthelecturehasnotbeendecidedyet.我们是否去听讲座还没有决定。Itmakesnodifferencetomewhetheritrainsornot.下不下雨对我来说都没有区别。如果用it作形式主语，则可以用if代替whether引导主语从句。Itmakesnodifferencetomeifitrainsornot.3.wh-word引导的主语从句表达相应的疑问概念，由原来的特殊疑问句充当。从句使用陈述句语序Whowilltakechargeofthisprojecthasnotbeendecidedyet.谁来负责这项工程还没有决定。Whosehandwritingthisishasnotbeenidentified.这是谁的笔记还没有确认。Whatweshoulddonextisnotdecided.我们下一步该做什么还未作出决定。WhichreportIshouldwritefirstisaquestion.我应该先写哪一份报告是个问题。Whysheleftisasecret.她为什么离开是一个谜。4.疑问词+-ever引导的主语从句whatever,whoever,whomever,whichever,whenever,wherever等Whoeverdoesbestwillgettheprize.谁做得最出色谁就得奖。WhateverIhaveisyours.我有的任何东西都是你的。Whicheveryouwantisyours.你要哪一个，哪一个就是你的。Summary类别规则连接词1.that：无词义，不充当成分，不可以省略2.whether：表示“是否”3.连接代词：who,whom,whose,what,which,whoever,whatever等4.连接副词：when,where,why,how,however,wherever等语序陈述语序（主语+谓语），不能倒装主谓一致主语从句作主语时，谓语动词通常用单数，若连接词what引导的从句表示复数概念，谓语可用复数形式主语itit作形式主语，主语从句后置it+be+adj./n+that从句it+be+p.p+that从句It+特定动词+that从句(1)Itisatruththatweshouldneverjudgeapersonbyhisorherappearance.(2)Whatweoftenfailtorealizeisthataperson’sinnerqualitiesarefarmoreimportantthantheiroutwardlooks.(3)Forexample,therearemanypeoplewhoseemordinaryatfirstglancebutwhopossessextraordinarykindnessandwisdom.(4)Itisthesequalitiesthattrulydefineaperson.(5)Thepersonwhohasabeautifulheartistheonewhoistrulyworthyofourrespectandadmiration.(6)Remember,itisnotwhatisontheoutsidebutwhatlieswithinthatmatters.1.Pleaseidentifythesubjectclauses.Why

subject

clause?TointroduceanabstracttopicTostressimportantinformationToaddexpressiveness表现力Tomakeatransitionmorenaturalthatwhether/ifwhat/who/whom/whose/whichwhen/where/why/howItis+n./adj./p.p+thatclauseIt+vt./vi+thatclauseMaXu,whoiswidelyrecognizedasChina’sfirstfemaleparatrooper,isafigurewhoselifestorycontinuestoinspiremany.

Whatimpressesmemost

arehercourage,skill,anddetermination.

Whethershecouldsucceedasaparatrooper

wasquestionedbymanyatthetime.

Whatshedidnext

waslearnparachutinginsecretthroughhardtraininguntilshecouldjumpaswellasanyothercandidate.

Itwasherperseverancethat

finallyledtothesuccessofherapplication.Overaperiodof20years,shecompletedmorethan140parachutejumps,whichremainsthehighestnumberforanyfemaleparatrooper