【課件】Unit+5+Discover+useful+structures+課件人教版（2019）選擇性必修第一冊

選擇性必修一Unit5

Discoverusefulstructures-

Subjectclauses主語從句的定義：在句中充當主語的從句叫做主語從句,有時為了避免頭重腳輕，常用it作形式主語。.Summer主語Hisjobisimportant.Whathedoesisimportant.主語Thenews

makesushappy.Thathebecamethechampionmakesushappy.2Heconsideredhimselfafarmer.Yuan’sinnovationhashelpedtofeedmorepeople.UsingsaltylandinChinaforriceproductionwashislatestvision.Howthiscouldbedonewasachallengingquestionatthetime.WhatconcernedYuanLongpingmostwasthatfarmersoftenhadpoorharvests.Itwastruethathehadjustreturnedhishomeland.Findthesubjectofthefollowingsentences找主語3ThatYuanLongpingcaredlittleforcelebrityormoneywastrue.Whetheritwaspossibletodevelopthehybridricewasindebate.Whowillsolvethesoilproblemisunknown.Whichoneisthebesttoexpandoutputisnotclear.WhenYuanwouldretiretoalifeofleisurewasnevermentioned.Wherethehybridricecanbeplantedisaquestion.WhyYuandevelopedseawaterricewastofeedmorepeople.找出主語從句有哪些不同的連接詞4連接代詞——What/who/which/whoever1.Whattherefugeeshavegonethroughisbeyondourimagination.2.WhowouldgettheopportunitytotraveltoBeijingisunknown.3.Whichstudentwouldbethevolunteerisnotclear.4.Whoeverbreaksthelawwillbepunished.Conclusion2:引導(dǎo)主語從句的連接代詞，主要有誰“

”、無論誰“

”什么“

”無論什么“

”、誰的“

”、哪一個“

”；在句中可以充當

、

、表語、

。whowhoeverwhatwhateverwhosewhich主語賓語定語5連接副詞——When/how/why/whereWhenwewillleavehasn'tbeendecided.Howshekeepshealthyisasecret.Whyhecriesisnotclear.Wherethemeetingwillbeheldisnotknown.Conclusion3:引導(dǎo)主語從句的連接副詞，在句中做“

”。主要包括：怎么樣“

”，為什么“

”在/去什么地方“

”，什么時候“

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

（有/無）含義，

（充當/不充當）句子成分，

（可/不可）省略。Whether

(充當/不充當）句子成分；意思是“

”。當主語從句在句首時，whether一般

（能/不能）被if替換。無不充當不可不充當是否不能7Thatallcountriesworktogetherisimportant.

探尋規(guī)律：

主語從句太長怎么辦？用一個It來解決問題！Itisimportantthatallcountriesworktogether.

It＋be＋形容詞/名詞短語/過去分詞/不及物動詞＋that從句Itiscertainthat

themedicinewillnotbringaboutsideeffect,becausethousandofpatientshavetakenit.形容詞(necessary/likely/important/certain等名詞(短語)(apity/ashame/nowonder等)Itisapitythatyoumissedsuchagoodchance.It’ssaidthathehasgonetoShanghai.過去分詞(said/told/reported等)Itappearsthatheisworryingaboutsomething.不及物動詞(seem,appear,happen,matter等)1)Itis/系動詞+adj.+從句常見的形容詞有：

It’scertainthat…肯定…

Itispossiblethat...可能……

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

2)Itis/系動詞+n.+從句

Itisapity/shamethat...遺憾的是……

Itisasurprisethat…令人驚奇的是…

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

Itiscommonknowledgethat……是常識_______________(很遺憾)welostthematch.______________(這是事實)hecheatedintheexam.ItisapitythatItisafactthatItisreportedthatItissuggestedthat3)It+be+過去分詞+從句Itissaid/told/heardthat...據(jù)說……Itiswellknowntoall...眾所周知……Itisreported/announced...據(jù)報道……Itisfoundout...

據(jù)查明......Itisestimated...據(jù)估計……Itisbelieved//hoped/thought/considered...人們相信……Itissuggestedthat+(should）do...人們建議……Itmustbeadmitted…必須承認……Itcannotbedenied…不可否認……Itmustbepointedout…需指出的是……*_________________(據(jù)報道)20peoplewerekilledintheaccident.*__________________(建議)weshouldeatmorevegetableanddomoreexercise.4)It+不及物動詞+從句

Ithappenedthat...碰巧……

Itoccurredtomethat…我突然想起…Itseems/appearsthat...看起來...*________________(剛好)Icameintotheofficeatthattime.*____________________(我突然想起)Iforgettosendtheletter.IthappenedthatItoccurredtomethatQuizz1.However,_____concernedhimmostwas_____farmersoftenhadpoorharvestsandsometimesevenhadaseriousshortageoffoodtoeat.2._____thiscouldbedonewasachallengingquestionatthetime.3.However,________itwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.4.______impressespeoplemostaboutYuanLongpingishisongoingabilitytofulfilhisdreams.whatthatHowwhetherWhat14主語從句的引導(dǎo)詞類別連接詞說明從屬連詞that，whether兩者在從句中均不作成分，只起連接作用；that無實義，whether表示“是否”。連接代詞who，what，which，whoever，whatever等在從句中作主語、賓語、表語、定語等成分。連接副詞when，where，how，why在從句中作時間、地點、方式、原因狀語等成分。主語從句的語序1.HowmuchdidIpayfortheviolinisasecret.2.HowmuchIpaidfortheviolinisasecret.3.Itisn’tclearwhetherhewillcomeornot.4.Itisn’tclearwhetherwillhecomeornot.5.Wherewewillhaveapicnicshouldbediscussed.6.Wherewillwehaveapicnicshouldbediscussed.7.Howwegoforapicnicshouldbediscussed.8.Howdowegoforapicnicshouldbediscussed.√√××√√××Rule1:主語從句的從句部分要用______語序16陳述句16主謂一致1.WhereLiBai,agreatChinesepoet,wasborn_____(be)knowntopublic,butsomewon’tacceptit.(2015江蘇卷)2.Whenthepersonwasmurderedandwhyhewasmurdered_____(be)stillunknownnow..3.It_____(be)stillnotexactlysuretoscientistshowgenesinfluenceaging,buttheybelievethattheydo.(2016四川卷)4.Whatheneeds_____(be)somebooks.5.Ifirsthavetoremovealltherottenparts,andsometimes,whatisleft____(be)notenoughformydesign.(2020河南天一大聯(lián)考)isareareisisRule2:forms+主句謂語verb單個主從多個主從并列It作形式主語What引導(dǎo)主從單數(shù)復(fù)數(shù)單數(shù)表/賓語決定17What/that區(qū)分1._____shebecameanartistmayhavebeenduetoherfather’sinfluence.2.Thetravelerlosthiswayinthewoods,and____madethingsworsewasthatitwasgettingdark.(2020山東青島聯(lián)考)3._____Iwasconcernedaboutwaswhetherhewouldreachthedestinationontime.4.______lifewaslikeforslavesintheancientworldisdifficulttoimagine.(2014山東卷)5.Therefore,itisadvisable_____youshouldvalueandtreatthemwithcare.(2020福建龍巖五校聯(lián)考)ThatwhatWhatWhatthatRules3elementsmeaningthatwhat不作成分無實際意義作主語、賓語、表語什么;所…的18Who/whoever區(qū)分1._______willberesponsiblefortheaccidentisstillunderinvestigation.2.Everyyear,________makesthemostbeautifulkitewill