Unit 1 Discover useful structures 表语从句（ppt课件）-2023新人教版（2019）《高中英语》选择性必修第二册.pptx

1、选择性必修二 Unit 1 Predicative Clause 理解:表语从句的结构及意义 掌握:表语从句的连接词及使用规则 运用:表语从句,去表达自己的想法 Learning AimsIt surprised all students.That I won the first surprised all students.Review what is subject clause?Sth句子做主语,被称为主语从句Review subject clause 1.What Yuan really cared about was not money or celebrity.2.That Yua

2、n had realised his dream of seawater rice surprised the whole world.3.It surprised the whole world that Yuan had realised his dream of developing seawater rice.句子做主语,被称为主语从句句子做表语,被称为表语从句1.One theory was that bad air caused the disease.2.Another was that cholera was caused by an infection from germs

3、in food or water.3.It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day.4.The truth was that the water from the Broad Street pump had been infected by waste.1.How to judge whether it is a predicative clause?主要依据：系动词后The problem is difficult.

4、The problem is that he can not speak English.Sth系动词有哪些？1.状态类:be动词;keep,remain,stay,2.感官类:look,feel(摸起来),smell,sound,taste3.变化类:become,grow,turn,get,go,come,run,fall4.像类:seem,appear,5.终止类:turn out 结果是,prove 证明是1.One theory was _ bad air caused the disease.2.Another was _ cholera was caused by an infe

5、ction from germs in food or water.3.It seemed _ the woman liked the water from the pump so much that she had it delivered to her house every day.4.The truth was _ the water from the Broad Street pump had been infected by waste.2.How to choose correct conjunction(连接词)?主语从句和表语从句的【连接词】类似连接词不同点共同点that没有

6、意义均不作句子成分whether是否，一般不用if替换as if/as though似乎，好像because因为表语从句的【从属连接词】注意1:表语从句的引导词没有if!只用whether,不用if的情况Whether to doWhetheror not介词后的宾语从句从句：句首的主语从句，表语从句，同位语从句2 because引导表语从句通常只用于“This/That/It is because”结构中。连接代词who,what,which,whose,whomwhoever,whatever,whichever主语宾语定语 连接副词when,where,how,why1.This is

7、_I want.2.My English is limited.This is _I hate reading English books.3.The village is _ I used to spend my holiday.4.It is _ I really love the way he behaves.5.The trouble is _ we are short of funds.6.My problem is _ coat is suitable for me.7.I d like to start my own businessthats _ I want to do if

8、 I had the money.8.What I want to know is _will support me.whatwherewhybecausethatwhichwhatwhoPractice表语从句的引导词连词在从句中不作句子成分连接代词在从句中作主语、宾语、定语等连接副词在从句中作状语whenwherewhyhowwhat/whateverwhich/whicheverwho/whoeverwhom,whose.that,whetheras if/as thoughbecauseSummary解题思路先根据句意选择不充当成分that,whether,as if/though,b

9、ecause连词充当状语when,where,why,how连接副词充当定语whose,what,which连接代词充当主语，宾语，表语其他再分析“充不充当句子成分”Matters need attention1.表语从句的【特殊句式】1.The reason why.is that.“.的原因是.”The reason is that.“原因是.”The reason _ I like English is _ it brings me happiness.The reason is _ English brings me joy.2.This/That/It is because.“这/那

10、是因为.”This/That/It is why.“这/那就是.的原因。”because引导表语从句，从句表原因。why引导表语从句，从句表结果。I like English.That is _ it brings me joy.English brings me joy.That is _ I like it.1.He is careless and irresponsible.That was _ he was fired.2.He was fired.That was _ he is careless and irresponsible.3.The reason _ he was fir

11、ed was _ he was careless and irresponsible.whybecausewhythat即学即练2.表语从句的【常见句式】1.It seems/appears that+句子“似乎.”2.It turns out/proves that+句子“结果、原来.”3.The chances are that+句子“可能.”1.It seems that we are going to be late 2.It turns out/proves that she was a friend of my sister.3.The chances are that he wi

12、ll recover from his injury in time for the next game.3.表语从句中的【虚拟语气】主语是表示“建议”“命令”“要求”的名词，表语从句应使用虚拟语气，即：(should)+动词原形u建议:suggestion,advice,proposal,ideau命令:order,command,u要求:request,requirement1.My suggestion is that we _(go)to hospital at once.2.When a pencil is partly in a glass of water,it looks as

13、 if it _(be)broken.3.My idea is that we _(get)more people to attend the conference.4.The little girl talked as if she _(be)a grown-up.5.She looks as if she _(be)ten years younger.should gowereshould gethad beenwere即学即练1.My idea is that you _(recite)50 English words every day.2.My suggestion is that

14、you _(build)up your vocabulary.3.My order is that all students _(pay)more attention to English learning.Examples4.as if/as though引导表语从句的【两种语气】1.若表陈述语气，就用陈述语气；2.若与客观事实不符，就用虚拟语气；u若跟现在事实不符：过去式（be动词用were）u若跟过去事实不符：had doneu若跟将来事实不符：would/could+动词原形1.It seems as if it _(be)spring already.2.It seems as if

15、 I _(be)flying in the sky.3.All this was 20 years ago,but it is as if it _(be)only yesterday.Exampleshad been could behad been5.表语从句用陈述语气，且连接词均不可省略。_ he wants is a book._ he wants to go there is obvious._ impressed me most was his committed determination._ touched me most was her heart of gold._ he

16、wants to improve English is exciting._ we need to do now is to improve English.that or what?表语从句的引导词连词在从句中不作句子成分连接代词在从句中作主语、宾语、表语、定语连接副词在从句中作状语whenwherewhyhowwhat/whateverwhich/whicheverwho/whoeverwhom,whose.that,whetheras if/as thoughbecauseSummary如何选引导词先根据句意选择不充当成分that,whether,as if/though,because

17、连词充当状语when,where,why,how连接副词充当定语whose,what,which充当主语，宾语，表语其他再分析“充不充当句子成分”EXAMPLEWhat Was it that John Snow showed to the world?What John Snow showed to the world was how cholera could be overcome.1.What was Snows discovery in two particular streets in London?Snows discovery in two particular streets

18、 in London was that_more than 500 people died in ten days.P5 2.Answer the following questions using the information from the reading passage as well as the predicative clauses.2.What was Snow determined to find out during the 1854 outbreak of cholera in London?What Snow was determined to find out wa

19、s why _3.What were the exact places(Snow marked on the map?)The exact places Snow marked on the map were where_4.What was the finding that Snow announced?Snows finding was that_ the cholera outbreak was so severe in the two particular streets.all those who died had lived the pump water carried chole

20、ra germs.P5 3.David is talking to Maria about their scientific research project.First complete Davids lines(A-E,using the words in the box.Then put Davids lines in the correct order and practice the conversation.A:Absolutely!You may not believe it,but that was _ happened at the initial stage of our

21、groups research on developing a vaccine for malaria.B:Yes,it is.And it seemed_all the theories were useful,but the fact was_we couldnt persuade one another that one theory was better than another.C:Exactly The problem was not about_all our theories were equally good,but in deciding._theory to depend

22、 upon.D:We realised that what we cared about was not_aspect we needed to develop a theory in,but rather _we can reduce the cost of a vaccine without reducing its effect!E:Youre right.At last,we became focused on the key issue,which was _we had to Cary out the research in the first place.as if that w

23、hat who when How why whose which whetherMaria:This mix of theory and data is one of the key characteristics of what we call science.David:_A_Maria:With your theoretical framework?David:_Maria:Deciding on a theory is definitely of critical importance.David:_Maria This was when you should have calmed down and got down to doing some sold work.David:_Maria:So what happened in the end?David:_Thank You!