Unit2Period3Discoveringusefulstructures（課件）-高中英語新教材（人教版選擇性）(共32張PPT)

人教版選擇性必修二Period3DiscoveringusefulstructuresSubjectClausesUnit2BridgingCulturesTeachingGoals1.EnabletheSstomastertheusageofsubjectclausesinthisunit.2.EnabletheSstousethesubjectclausespatternsflexibly.3.TraintheSstoapplysomeskillsbydoingtherelevantexercises.自我探究；發(fā)現(xiàn)規(guī)律

{Jack'sstoryismoving.WhatJackdidismoving.

主語在句中充當(dāng)主語的從句叫做主語從句。什么是主語從句？主語從句是在復(fù)合句中充當(dāng)主語的從句，通常放在主句謂語動詞之前；或由形式主語it代替，而本身放在句子末尾。1.WhatseemedstrangebeforenowappearsquitenormaltoXieLei.2.WhatsurprisedXieLeiwasthatshefoundherselfspeakingupinclassafterjustafewweeks.3.ItisimportantthatXieLeikeepsabalancebetweenherstudiesandhersociallife.5.Howthebookwillselldependsonitsauthor.6.Itisimportantthatweallshouldattendthemeeting.劃出下列句子中的主語從句主語從句的連接詞Thathewillwin

iscertain.Whetherhe’lljoinusinthediscussion

isofgreatimportance.1.從屬連詞：that：只起引導(dǎo)作用，本身無實際意義，不充當(dāng)任何成分，但不能省略。whether：意為“是否”，不充當(dāng)從句的任何成分。2.連接代詞who,what,which,whoever,whatever,whichever引導(dǎo)主語從句，包含意思，并在從句中充當(dāng)成分。1)_____yousaidyesterdayisright.2)_____sheisstillaliveisaconsolation（安慰）.3)_____helostthebikeworriedhimalot.4)_____causedtheaccidentremainsunknown.

5)_____mademattersworsewas____nightbegantofall.6)_____wecan’tgetseemsbetterthan______wehave.WhatThatThat注：what

與that在引導(dǎo)主語從句時的區(qū)別what在從句中充當(dāng)句子成分，如主語、賓語、表語，而that則不然。

WhatWhatthatWhatwhatWherewewillholdthebasketballgametomorrowisnotimportant.Whenshewillbeback

isstillaquestion.Whyhecamehere

isnotknown.Howwecanprotectthegrainfromdamp

needstobediscussed.3.連接副詞when,where,why,how等引導(dǎo)主語從句，包含意思，并在從句中充當(dāng)成分，不可省略。為了避免句子頭重腳輕，通常把形式主語it放在主語位置，真正主語置于句末。(1)it作形式主語，從屬連詞that引導(dǎo)的從句作真正的主語。①It＋be＋形容詞(obvious，true，natural，surprising，good，wonderful，funny，possible，likely，certain，probable等)＋that從句。Itisn'tlikelythatIshouldacceptsuchanofferasthat.我不可能接受像那樣的幫助。②It＋be＋名詞詞組(nowonder，anhonor，agoodthing，apity，nosurprise等)＋that從句。It'snowonderthathedidn'twanttogo.難怪他不想去。

用it作形式主語的結(jié)構(gòu)it做形式主語跟蹤練習(xí)重難點突破分析句子成分缺主賓表定缺狀語用連接代詞

用連接副詞

根據(jù)語意缺什么補(bǔ)什么都不缺用that或whetherwho___whetherWhyThatwhat1._______makesdogsidentifypatientswithcancerisamystery.2._______hesucceededinapplyingforthepositionmadehisfamilyhappy.3.It’snotsure_________teamwillwinthematch.that、what、which區(qū)別that在從句中不作成分，只起連接作用，無意義；what在從句中作主賓表或定語，“what什么,或所…”which在從句中作主賓表或定語，which“哪一個”有選擇范圍。WhatThatwhich1.________breaksthelawwillbepunished.

_______________breaksthelaw,he/shewillbepunished.2.______isknowntousallisthatsomestudentscheatinexamsatschool.

______isknowntousallthatsomestudentscheatinexamsatschool.______isknowntousall,

somestudentscheatinexamsatschool.WhoeverNomatterwhoWhoeverWhatItAs對比訓(xùn)練1.Itisagoodideathat/anhonor/mypleasurethat…2.Itisnatural/strange/essential/important..thatsb.shoulddo…3.Itseems/appears/happenedthat…4.Itisreported/saidthat…據(jù)報道…Itisrequired/suggested

thatsb（should）do…用it作形式主語的句型:主謂一致1.Whenhewilldotheexperiment______(have)notbeendecidedyet.2.Whatwebadlyneed______enoughtimetosleep.3.Whattheboywants________somebooksofgreatbenefit.hasisare從句做主語謂語一般用單數(shù)

what從句根據(jù)它所指代的內(nèi)容確認(rèn)謂語單復(fù)數(shù)。1.______thedelayedflightwilltakeoffdependsmuchontheweather.2.It’suncertain_____sideeffectthemedicinewillbringabout,althoughabouttwothousandpatientshavetakeit.3._______wasmostimportanttoher,shetoldme,washerfamily.4.______LiBai,agreatChinesepoet,wasbornisknowntothepublic,butsomewon’tacceptit.WhenwhatWhatWherePractice改錯1.Italldependsoniftheywilldotheirbest.

2.Isthatyoutoldtrue?3..Firstofall，weshouldpreventhimfromdoingitisthemostimportant.4.Weallthoughtitisapitywhichtheconcertwasputoff.whetherwhatthatthat－－－＾寫作練習(xí)李華收到美國朋友Mike的來信，聽說港珠澳大橋已全線通車，這是建筑史上一大奇觀。想向李華了解具體詳情。請你回信作個簡要介紹。DearMikke,Ihaveheardfromyou.YouwouldliketolearnabouttheHongkong-Zhuhai-MacaoBridge.1.Hereissomerelevantinformationaboutit.Itstotallengthis49.97kilometers.ItstratedinDecember2009.2.It'stheworld'slongestsea-crossingbridge,whichamazestheworld.3.Atthebeginning,thepassagemoneyconcernedsomepeoplealot.4.Besides,peopledidn'tknowwhethertheprojectwouldaffectwhitedolphins.Thesehadattractedthechiefengineers'attention.Beforetheconstruction,manymeetingshadbeenheld.RewriteDearMikke,Ihaveheardfromyou.YouwouldliketolearnabouttheHongkong-Zhuhai-MacaoBridge.1.

Hereissomerelevantinformationaboutit.Itstotallengthis49.97kilometers.ItstratedinDecember2009.2.It'stheworld'slongestsea-crossingbridge,whichamazestheworld.3.Atthebeginning,thepassagemoneyconcernedsomepeoplealot.WhatIwanttotellyouhereThattheworld'sthelongestsea-crossingbridgeisopenedamazestheworld.Whatconcernedsomepeoplemostwasthepassagemoney.Whethertheprojectwouldaffectthewhitedolphinshadattractedthechiefengineers'attention.Howthebridgewouldbeconstructedhadbeendiscussedformanytimes.7.Theexpertspredictthelifespanofthebridgeissetat120years.

8.ItreducestraveltimefromHongkongtoMacauorZhuhaifromoverthreehourstojusthalfanhour.

9.Thebridgemakesitconvenientforpeopletotravel.

Thanksyouforyourcloseattention.