人教版選擇性必修二Period3DiscoveringusefulstructuresSubjectClausesUnit2BridgingCulturesTeachingGoals1.EnabletheSstomastertheusageofsubjectclausesinthisunit.2.EnabletheSstousethesubjectclausespatternsflexibly.3.TraintheSstoapplysomeskillsbydoingtherelevantexercises.自我探究；發現規律

{Jack'sstoryismoving.WhatJackdidismoving.

主語在句中充當主語的從句叫做主語從句。什么是主語從句？主語從句是在復合句中充當主語的從句，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：只起引導作用，本身無實際意義，不充當任何成分，但不能省略。whether：意為“是否”，不充當從句的任何成分。2.連接代詞who,what,which,whoever,whatever,whichever引導主語從句，包含意思，并在從句中充當成分。1)_____yousaidyesterdayisright.2)_____sheisstillaliveisaconsolation（安慰）.3)_____helostthebikeworriedhimalot.4)_____causedtheaccidentremainsunknown.

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

與that在引導主語從句時的區別what在從句中充當句子成分，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等引導主語從句，包含意思，并在從句中充當成分，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作形式主語的結構it做形式主語跟蹤練習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

根據語意缺什么補什么都不缺用that或whetherwho___whetherWhyThatwhat1._______makesdogsidentifypatientswithcancerisamystery.2._______hesucceededinapplyingforthepositionmadehisfamilyhappy.3.It’snotsure_________teamwillwinthematch.that、what、which區別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對比訓練1.Itisagoodideathat/anhonor/mypleasurethat…2.Itisnatural/strange/essential/important..thatsb.shoulddo…3.Itseems/appears/happenedthat…4.Itisreported/saidthat…據報道…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

what從句根據它所指代的內容確認謂語單復數。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.