Unit 1 Science and Scientists Discover useful structures 表语从句（ppt课件）(2)-2022新人教版（2019）《高中英语》选择性必修第二册.pptx

1、Unit 1 Science and Scientists His diarrhoea seems severe.The two policies are contradictory.This is a water pump.His job is to handle the problem.What do the sentences have in common in their structures?表语是表语是用来说明主语的身份、性质、品性、特征和状态用来说明主语的身份、性质、品性、特征和状态的，表语的，表语常由常由名词、代词、数词、动词过去分词、动词的名词、代词、数词、动词过去分词、动词

2、的-ing-ing形式、副词、形式、副词、介词短语、形容词、不定式介词短语、形容词、不定式和和从句从句等来充当。等来充当。His diarrhoea seems severe.The two policies are contradictory.This is a water pump.His job is to handle the problem.contradictoryTheory one:_caused by bad air Theory two:_caused by germs One theory was that bad air caused the disease.The o

3、ther was that cholera was caused by an infection from germs in food and water._主语主语 系动词系动词 表语从句表语从句 表语从句是指_,紧跟在_之后，对主语进行解释、说明，使主语的内容具体化。从句在句子中充当表语从句在句子中充当表语系动词系动词1.状态系动词：be 2.感官系动词：feel,seem,look,appear,sound,taste,smell 3.持续系动词：stand,lie,remain,keep,stay4.变化系动词：become,get,grow,turn,go,come,run,fall

4、5.终止系动词：prove,turn out 是.起来保持变得证明是.结果是.可以接表语从句系动词有：The fact was that he had forgotten about it.Everything remained as it used to be in this room.She looks as if she were ill.The trouble was whether we could manage it ourselves or not.The problem is not who will go,but who will stay.This is how they

5、overcame the difficulties.He missed the lecture.It was because his flight was delayed.Predicative ClauseTask Two:Circle the conjuction of each predicative clause.Task One:Underline the linking verbs.连接词连接词连词连词:that,whether,as if,as though,because 连接副词连接副词:when,where,how,why,+ever连接代词连接代词:what,who,wh

6、om,whose,which,+ever引导词Conjunction words（在从句中不作成分）（在从句中不作成分）（在从句中作（在从句中作主语、宾语、表语、定语主语、宾语、表语、定语）（在从句中作（在从句中作状语状语）Summary:从属连词：that、whether(不能用if)1.My belief is _I will succeed by working hard.2.The most pleasant thing of the rainy season is _one can be entirely free from dust.雨季最令人愉快的事情是完全没有灰尘。3.The

7、problem is _we can find them there.whetherthatthatthat在从句中不做成分，也没有实际意义，但不可省略；whether也不能省略，意思为：是否。注意：as if/as though引导的表语从句如果是事实，就用陈述语气；如果与事实不符，就用虚拟语气。1.It sounds as if someone _ knocking at the door.(与事实相符)2.Tom likes to talk big as if he _ an important person.(对现在的虚拟，用一般过去时，be动词用were)3.He opens his

8、 mouth as if he _ say something./as if to say something (对将来的虚拟，用would/could/might+do)4.He talked about Rome as if he _ there.(对过去的虚拟，用had done)iswerewouldhad been连接副词：when、where、why、how1.This is _I dont agree with you.这就是我不同意你的地方。2.The question is _we can get in touch with him.问题是我们怎样才能和他联系上。3.That

9、 is _ I got wet through.那就是为什么我被淋湿了。when、where、why、how引导表语从句，在从句中作状语，表示时间、地点、原因、方式。wherehowwhy关系代词：who(ever)、whom(ever)、whose、what(ever)1.You can be _ you want to be.2.The question is _ caused the accident.3.The most important thing is _ responsibility it is.who(ever)、whom(ever)、whose、what(ever)在从句中

10、作主语、宾语、表语、定语。whoeverwhosewhat1.表语从句和其他从句一样都用陈述语序：连词+主语+谓语（连主谓）。2.that引导表语从句引导表语从句时时,在在句中只起连接句中只起连接作用作用,不不充当充当句句子成分子成分,无无实际实际意义意义,不能省略。不能省略。表语从句的注意点The grammar rulers of the predicative clause e.g.One advantage of playing the guitar is that it can give you a great deal of pleasure.e.g.The trouble is

11、that I have lost his address.表语从句的注意点The grammar rulers of the predicative clause3.表语从句的引导词没有if!The question is if it is worthwhile to do it.The question is whether it is worthwhile to do it.只用whether,不用if的情况 whether to do whetheror not 介词后的宾语从句。（介词后不用if)从句：句首的主语从句，宾语从句，同位语从句。(if不能位于句首）单句改错。表语从句的注意点

12、The grammar rulers of the predicative clause4:表语从句的虚拟语气My proposal is that we(should)start early tomorrow.My advice is that we(should)get there by train.My suggestion is that we(should)go and help him.1)在表示“一坚持（insist)二命令(order,command)三建议(advise,suggest,propose)四要求(ask,require,request,demand)”的名词 a

13、dvice,suggestion,request,proposal,idea 等后面的表语从句中，谓语动词用“should+动词原形”，should可省略表语从句的注意点The grammar rulers of the predicative clause2)as if/as though 引导的表语从句常跟在look,seem,sound,feel等后面语气：若表示真实情况，用陈述语气。若表示非真实情况，用虚拟语气。Dark clouds are gathering.It looks as if its going to rain.It sounded as if the night wo

14、uld never end.The grammar rulers of the predicative clauseSummary:This/That/It is/was because/that+原因 This/That/It is/was why+结果 The reason why+结果.is/was that+原因.I do so many things for you.It is because I love you.I am late this morning.That is because I left my bag on the subway.Your speech is exc

15、ellent.This is because you prepared it a lot.The reason why he was late was that he missed the early bus.The reason was that you dont trust her.He was ill.Thats why he was sent to the hospital.表语从句的注意点Summary：1.表语从句的结构:主语+系动词+引导词+简单句2.引导词:连词：that,whether,as,as if/though,because 连接代词：who,what,which,w

16、hom,whose.+ever连接副词：when,where,how,why,.+ever3.注意点:3）if 不引导表语从句。4）表语从句的虚拟语气。1）语序:连主谓。2）that引导表语从句时不能省略。表语从句1.The fact was .事实是他没有做真正的努力。2.The question is .问题是这部电影是否值得看。3.she had known Millie for years.看起来好像她认识米莉已有好多年了。4.My advice is as often as possible.我的建议是你尽可能经常地练习说英语。Complete the sentences.that

17、he didnt really trywhether the film is worth seeingIt seemed as though/ifthat you(should)practise speaking English5.Thats .那就是我第一次遇见她的地方。6.The problem is .问题是谁才真正适合做这份艰苦的工作。7.That is .那就是我想让你在这儿工作的原因。8.I was late for school this morning.last night.今天早上我上学迟到了。那是因为我昨晚睡得太晚了。where I first met herwho is really fit for the hard jobwhy I want you to work hereThats because I stayed up too lateAssignments1.整理笔记到积累本上2.预习Using language 课文3.完成课时作业七