【课件】Unit+5+Discover+useful+structures+课件人教版（2019）选择性必修第一册

选择性必修一Unit5

Discoverusefulstructures-

Subjectclauses主语从句的定义：在句中充当主语的从句叫做主语从句,有时为了避免头重脚轻，常用it作形式主语。.Summer主语Hisjobisimportant.Whathedoesisimportant.主语Thenews

makesushappy.Thathebecamethechampionmakesushappy.2Heconsideredhimselfafarmer.Yuan’sinnovationhashelpedtofeedmorepeople.UsingsaltylandinChinaforriceproductionwashislatestvision.Howthiscouldbedonewasachallengingquestionatthetime.WhatconcernedYuanLongpingmostwasthatfarmersoftenhadpoorharvests.Itwastruethathehadjustreturnedhishomeland.Findthesubjectofthefollowingsentences找主语3ThatYuanLongpingcaredlittleforcelebrityormoneywastrue.Whetheritwaspossibletodevelopthehybridricewasindebate.Whowillsolvethesoilproblemisunknown.Whichoneisthebesttoexpandoutputisnotclear.WhenYuanwouldretiretoalifeofleisurewasnevermentioned.Wherethehybridricecanbeplantedisaquestion.WhyYuandevelopedseawaterricewastofeedmorepeople.找出主语从句有哪些不同的连接词4连接代词——What/who/which/whoever1.Whattherefugeeshavegonethroughisbeyondourimagination.2.WhowouldgettheopportunitytotraveltoBeijingisunknown.3.Whichstudentwouldbethevolunteerisnotclear.4.Whoeverbreaksthelawwillbepunished.Conclusion2:引导主语从句的连接代词，主要有谁“

”、无论谁“

”什么“

”无论什么“

”、谁的“

”、哪一个“

”；在句中可以充当

、

、表语、

。whowhoeverwhatwhateverwhosewhich主语宾语定语5连接副词——When/how/why/whereWhenwewillleavehasn'tbeendecided.Howshekeepshealthyisasecret.Whyhecriesisnotclear.Wherethemeetingwillbeheldisnotknown.Conclusion3:引导主语从句的连接副词，在句中做“

”。主要包括：怎么样“

”，为什么“

”在/去什么地方“

”，什么时候“

”。状语howwhywherewhen6That/whether1.ThatIloveEnglishisreal.2.Thatyoucantravelaroundtheworldisamazing.3.Whetherhewillcomeisuncertain.4.Whethertheboycouldwinmademecurious.Conclusion1:that在句中

（有/无）含义，

（充当/不充当）句子成分，

（可/不可）省略。Whether

(充当/不充当）句子成分；意思是“

”。当主语从句在句首时，whether一般

（能/不能）被if替换。无不充当不可不充当是否不能7Thatallcountriesworktogetherisimportant.

探寻规律：

主语从句太长怎么办？用一个It来解决问题！Itisimportantthatallcountriesworktogether.

It＋be＋形容词/名词短语/过去分词/不及物动词＋that从句Itiscertainthat

themedicinewillnotbringaboutsideeffect,becausethousandofpatientshavetakenit.形容词(necessary/likely/important/certain等名词(短语)(apity/ashame/nowonder等)Itisapitythatyoumissedsuchagoodchance.It’ssaidthathehasgonetoShanghai.过去分词(said/told/reported等)Itappearsthatheisworryingaboutsomething.不及物动词(seem,appear,happen,matter等)1)Itis/系动词+adj.+从句常见的形容词有：

It’scertainthat…肯定…

Itispossiblethat...可能……

Itis(un)likelythat...不可能……Itisobviousthat…很明显…Itisnecessary/important/natural/clear/right/strange/surprising/interesting/essential/...that…_________________(可能)shewillcomebacktomorrow._______________(很明显)thismeasureiseffective.+(should)+do…ItispossiblethatItisobviousthat

2)Itis/系动词+n.+从句

Itisapity/shamethat...遗憾的是……

Itisasurprisethat…令人惊奇的是…

Itisafact/aproblem/awonder/anhonour/asurprise/nowonder（难怪）/goodnews/agoodthing/aquestion/that…

Itiscommonknowledgethat……是常识_______________(很遗憾)welostthematch.______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthatItisreportedthatItissuggestedthat3)It+be+过去分词+从句Itissaid/told/heardthat...据说……Itiswellknowntoall...众所周知……Itisreported/announced...据报道……Itisfoundout...

据查明......Itisestimated...据估计……Itisbelieved//hoped/thought/considered...人们相信……Itissuggestedthat+(should）do...人们建议……Itmustbeadmitted…必须承认……Itcannotbedenied…不可否认……Itmustbepointedout…需指出的是……*_________________(据报道)20peoplewerekilledintheaccident.*__________________(建议)weshouldeatmorevegetableanddomoreexercise.4)It+不及物动词+从句

Ithappenedthat...碰巧……

Itoccurredtomethat…我突然想起…Itseems/appearsthat...看起来...*________________(刚好)Icameintotheofficeatthattime.*____________________(我突然想起)Iforgettosendtheletter.IthappenedthatItoccurredtomethatQuizz1.However,_____concernedhimmostwas_____farmersoftenhadpoorharvestsandsometimesevenhadaseriousshortageoffoodtoeat.2._____thiscouldbedonewasachallengingquestionatthetime.3.However,________itwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.4.______impressespeoplemostaboutYuanLongpingishisongoingabilitytofulfilhisdreams.whatthatHowwhetherWhat14主语从句的引导词类别连接词说明从属连词that，whether两者在从句中均不作成分，只起连接作用；that无实义，whether表示“是否”。连接代词who，what，which，whoever，whatever等在从句中作主语、宾语、表语、定语等成分。连接副词when，where，how，why在从句中作时间、地点、方式、原因状语等成分。主语从句的语序1.HowmuchdidIpayfortheviolinisasecret.2.HowmuchIpaidfortheviolinisasecret.3.Itisn’tclearwhetherhewillcomeornot.4.Itisn’tclearwhetherwillhecomeornot.5.Wherewewillhaveapicnicshouldbediscussed.6.Wherewillwehaveapicnicshouldbediscussed.7.Howwegoforapicnicshouldbediscussed.8.Howdowegoforapicnicshouldbediscussed.√√××√√××Rule1:主语从句的从句部分要用______语序16陈述句16主谓一致1.WhereLiBai,agreatChinesepoet,wasborn_____(be)knowntopublic,butsomewon’tacceptit.(2015江苏卷)2.Whenthepersonwasmurderedandwhyhewasmurdered_____(be)stillunknownnow..3.It_____(be)stillnotexactlysuretoscientistshowgenesinfluenceaging,buttheybelievethattheydo.(2016四川卷)4.Whatheneeds_____(be)somebooks.5.Ifirsthavetoremovealltherottenparts,andsometimes,whatisleft____(be)notenoughformydesign.(2020河南天一大联考)isareareisisRule2:forms+主句谓语verb单个主从多个主从并列It作形式主语What引导主从单数复数单数表/宾语决定17What/that区分1._____shebecameanartistmayhavebeenduetoherfather’sinfluence.2.Thetravelerlosthiswayinthewoods,and____madethingsworsewasthatitwasgettingdark.(2020山东青岛联考)3._____Iwasconcernedaboutwaswhetherhewouldreachthedestinationontime.4.______lifewaslikeforslavesintheancientworldisdifficulttoimagine.(2014山东卷)5.Therefore,itisadvisable_____youshouldvalueandtreatthemwithcare.(2020福建龙岩五校联考)ThatwhatWhatWhatthatRules3elementsmeaningthatwhat不作成分无实际意义作主语、宾语、表语什么;所…的18Who/whoever区分1._______willberesponsiblefortheaccidentisstillunderinvestigation.2.Everyyear,________makesthemostbeautifulkitewill