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1、人教版 选择性必修二Period 3 Discovering useful structuresSubject ClausesUnit 2 Bridging Cultures1.EnabletheSstomastertheusageof1.EnabletheSstomastertheusageofsubjectsubjectclausesinthisunit.clausesinthisunit.2.EnabletheSstousethe2.EnabletheSstousethesubjectsubjectclausespatternsflexibly.clausespatternsflexib
2、ly.3.TraintheSstoapplysomeskillsby3.TraintheSstoapplysomeskillsbydoingtherelevantexercises.doingtherelevantexercises.Jacks story is moving.What Jack did is moving.主语在句中充当主语的从句叫做主语从句。主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前；或由形式主语it代替，而本身放在句子末尾。1.What seemed strange before now appears quite normal to Xie Lei.2
3、.What surprised Xie Lei was that she found herself speaking up in class after just a few weeks.3.It is important that Xie Lei keeps a balance between her studies and her social life.5.How the book will sell depends on its author.6.It 6.It is important that we all should attend the meeting.is importa
4、nt that we all should attend the meeting.划划出下列句子中的主语从句出下列句子中的主语从句主语从句的连接词That he will win is certain.Whether hell join us in the discussion is of great importance.1.从属连词：that：只起引只起引导导作用，本身无作用，本身无实际实际意意义义，不充当任何，不充当任何成分，但成分，但不能省略不能省略。whether：意为“是否”，不充当从句的任何成分。2.连接代词who,what,which,whoever,whatever,whic
5、hever引导主语从句，包含意思，并在从句中充当成分。Who will meet him is not decided.What you told me just now was really a surprise.Which class will win the football game is not clear.Whoever breaks the law should be punished.Whatever he says is of no importance.Whichever of you comes first will receive a prize.1)_ you sai
6、d yesterday is right.1)_ you said yesterday is right.2)_ she is still alive is a consolation2)_ she is still alive is a consolation（安慰）（安慰）.3)_ he lost the bike worried him a lot.3)_ he lost the bike worried him a lot.4)_ 4)_ caused caused the the accident accident remains remains unknown.unknown.5)
7、_ made matters worse was_ night began to fall.5)_ made matters worse was_ night began to fall.6)_ we cant get seems better than _ we have.6)_ we cant get seems better than _ we have.WhatWhatThatThatThatThat注：what 与 that在引导主语从句时的区别what 在从句中充当句子成分，如主语、宾语、表语，而that 则不然。WhatWhatWhat thatWhat thatWhat wha
8、tWhat whatWhere we will hold the basketball game tomorrow is not important.When she will be back is still a question.Why he came here is not known.How we can protect the grain from damp needs to be discussed.3.连接副词when,where,why,how等引导主语从句，包含意思，并在从句中充当成分，不可省略。为了为了避免句子头重脚轻，通常把避免句子头重脚轻，通常把形式主语形式主语it i
9、t放在主语放在主语位置，真正主语置于句末。位置，真正主语置于句末。(1)it作形式主语，从属连词that引导的从句作真正的主语。Itbe形容词(obvious，true，natural，surprising，good，wonderful，funny，possible，likely，certain，probable等)that从句。It isnt likely thatIshouldacceptsuchanofferasthat.我不可能接受像那样的帮助。Itbe名词词组(nowonder，anhonor，agoodthing，apity，nosurprise等)that从句。Its no wo
10、nder thathedidntwanttogo.难怪他不想去。用it 作形式主语的结构1.(_ is needed for success)is your hard work.2.(_ _can join in the sport meet)is decided by the teacher.3.(_ it will rain or not)is not clear.4.(_ the earth is becoming warm)is a good topic for research.5.(_ the earth is a solid ball)is known to us all.重难点
11、突破重难点突破分析句分析句子成分子成分缺主宾缺主宾表定表定缺状缺状语语用连接代用连接代词词 用连接副用连接副词词 根据语意缺什么根据语意缺什么补什么都不缺用补什么都不缺用that或或whether1._ makes dogs identify patients with cancer is a mystery.2._ he succeeded in applying for the position made his family happy.3.Its not sure _team will win the match.that、what、which区别区别that 在从句中在从句中不作成分
12、，只起不作成分，只起连接作用，无意连接作用，无意义；义；what在从句中在从句中作主宾表或定作主宾表或定语，语，“what 什什么么,或所或所”which在从句中在从句中作主宾表或定语，作主宾表或定语，which“哪一个哪一个”有选择范围。有选择范围。1.It is a good idea that/an honor/my pleasure that 2.It is natural/strange/essential/important.that sb.should do 3.It seems/appears/happened that 4.It is reported/said that 据
13、报道据报道 It is required/suggested that sb（should）do用用it 作形式主语的句型作形式主语的句型:主谓一致主谓一致1.When he will do the experiment _(have)not been decided yet.2.What we badly need _ enough time to sleep.3.What the boy wants _ some books of great benefit.hasisare从句做主语谓语一般用从句做主语谓语一般用单数单数 what从句根据它所指代从句根据它所指代的内容确认谓语单复数。的内
14、容确认谓语单复数。1 1._._ the delayed flight will take off depends much on the the delayed flight will take off depends much on the weather.weather.2.2.Its Its uncertain _ side effect the medicine will bring about,uncertain _ side effect the medicine will bring about,although about two thousand patients have
15、 take it.although about two thousand patients have take it.3.3._was most important to her,she told me,was her family.was most important to her,she told me,was her family.4.4._ _ Li Bai,a great Chinese poet,was born is known to the Li Bai,a great Chinese poet,was born is known to the public,but some
16、wont accept it.public,but some wont accept it.WhenwhatWhatWhere改错1.Italldependsoniftheywilldotheirbest.2.Isthatyoutoldtrue?3.First of all，we should prevent him from doing it is the most important.4.We all thought it is a pity which the concert was put off.whetherwhatthatthat写作练习李华收到美国朋友Mike的来信，听说港珠澳
17、大桥已全线通车，这是建筑史上一大奇观。想向李华了解具体详情。请你回信作个简要介绍。DearMikke,Ihaveheardfromyou.YouwouldliketolearnabouttheHongkong-Zhuhai-MacaoBridge.1.Hereissomerelevantinformationaboutit.Itstotallengthis49.97kilometers.ItstratedinDecember2009.2.Itstheworldslongestsea-crossingbridge,whichamazestheworld.3.Atthebeginning,thep
18、assagemoneyconcernedsomepeoplealot.4.Besides,peopledidntknowwhethertheprojectwouldaffectwhitedolphins.Thesehadattractedthechiefengineersattention.Beforetheconstruction,manymeetingshadbeenheld.5.Atthemeeting,thetimeofcompletionhadbeendecided.6.Leadershaddiscussedhowtoconstructthebridgeformanytimes.Wi
19、ththeworkersefforts,thebridgehadbeenopenedtotrafficinOctober,2018.7.Theexpertspredictthelifespanofthebridgeissetat120years.8.ItreducestraveltimefromHongkongtoMacauorZhuhaifromoverthreehourstojusthalfanhour.9.Thebridgemakesitconvenientforpeopletotravel.Thanksyouforyourcloseattention.yours,LiHuaRewrit
20、eDearMikke,Ihaveheardfromyou.YouwouldliketolearnabouttheHongkong-Zhuhai-MacaoBridge.1.Here issomerelevantinformationaboutit.Itstotallengthis49.97kilometers.ItstratedinDecember2009.2.Its the worlds longest sea-crossing bridge,which amazes the world.3.At the beginning,the passage money concerned some
21、people a lot.WhatIwanttotellyouhereThattheworldsthelongestsea-crossingbridgeisopenedamazestheworld.Whatconcernedsomepeoplemostwasthepassagemoney.4.Besides,people didnt know whether the project would affect the white dolphins.This had attracted the chief engineers attention.Beforetheconstruction,many
22、meetingshadbeenheld.5.At the meeting,the time of completion had been decided.6.Leaders had discussed how to construct the bridge for many times.Withtheworkersefforts,thebridgehasbeenopenedtotrafficinOctober,2018.Whether the project would affect the white dolphins had attracted the chief engineers at
23、tention.When the bridge would be completed had been decided at the meeting.How the bridge would be constructed had been discussed for many times.7.The experts predict the life span of the bridge is set at 120 years.8.It reduces travel time from Hongkong to Macau or Zhuhai from over three hours to ju
24、st half an hour.9.The bridge makes it convenient for people to travel.Thanksyouforyourcloseattention.yours,LiHuaIts predicted that the life span of the bridge is set at 120 years.That the Hongkong-Zhuhai-macao Bridge is built will reduce travel time from over three hours to just half an hour.That the bridge is built makes it convenient for people to travel.that whether what（ever）which(ever)who(ever)Whom(ever)whose when where how why whenever wherever however 连接词连接词连接连接代词代词连接连接副词副词无意义无意义是否是否不做成分不做成分作主、宾、表作主、宾、表 、定语、定语作状语作状语主语从句三要素谓语一般用单数从句用陈述语序不能省略关联词
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