Unit 1 Discover Useful Structures 表语从句 课件ppt --（2023新教材）高中英语人教版（2019）选择性必修第二册.pptx

1、UNIT 1 DISCOVER USEFUL STRUCTURES 表语从句MISS LIN2023.3.13目录目录 1、LEAD IN:课文例句与系动词回顾课文例句与系动词回顾 2、CONCEPT:表语从句的概念与引导词表语从句的概念与引导词 3、IMPORTANCE AND DIFFICULTIES:表语从句的重难点表语从句的重难点 4、EXERCISE IN THE TEXTBOOK:教材练习教材练习 5、EXTENDED TRAINING:扩展训练扩展训练The truth was that the water from the Broad Street pump had been

2、infected by waste.predicative clause表语从句表语从句事实/真相 的内容是.回顾：系动词的分类状态类：状态类：be动词，动词，seem,appear,keep,remain,stay感观类：感观类：look,smell,taste,sound,feel变化类：变化类：become,get,turn,grow,fall,come,goLinking verbs找出下列句子中的表语判断表语的主要依据就是表语在系动词之后。(系表结构）链接教材1.（教材P2）One theory was that bad air caused the disease.2.（教材P5）

3、You may not believe it,but that was what happened at the initial stage of our groups research on developing a vaccine for malaria.3.（教材P5）What Snow was determined to find out was why the 1854 outbreak of cholera in London could have caused over 500 deaths within ten days.4.（教材P5）We realised that wha

4、t we cared about was not what aspect we needed to develop a theory in,but rather how we can reduce the cost of a vaccine without reducing its effect!观察并归纳：1.所有例句中的蓝框部分都位于_后，作表语，故都是 _从句，这些从句相当于一个_。系动词be表语名词2.句一由从属连词_引导；句二由连接代词_引导；句三由连接副词 _引导；句四由连接代词_引导。thatwhatwhywhat表语从句的概念 表语从句放在系动词（也称连系动词）之后，充当复合句

5、中的表语，说明主语是什么或者怎么样。一般结构为“主语+系动词+表语从句”。可接表语从句的系动词有be,look,remain,seem等。类别引导词用法从属连词that只起连接作用，不作句子成分,无实际意义whether只起连接作用,不作句子成分，意为“是否”，不能用if替换连接代词who,what,whom,whose,which等在从句中作主语、宾语、表语等表语从句的引导词表语从句的引导词类别引导词用法连接副词when,where,why,how等在从句中作状语其他连词because主句主语一般不用reasonas if/as though表语从句表示的情况发生的可能性较小时，常用虚拟语气

6、表语从句的引导词表语从句的引导词 表语从句中引导词的选择表语从句中引导词的选择1.由连接词that,whether引导的表语从句从属连词that的用法：无意义；不充当成分。而whether有词义，意为“是否”。这时主句的主语常常是些抽象名词，如 question,trouble,problem,result,chance,suggestion,idea,reason 等。表语从句对主句主语进行说明、解释，使主语的内容具体化。The reason for his absence is that he hasnt been informed.他缺席的原因是他没被通知。The point is wh

7、ether we should lend him the money.关键在于我们是否应该借钱给他。2.由连接代词引导的表语从句在连接代词who,what,which,whom,whose等引导的表语从句中，连接代词在句中作主语、宾语、表语等，并且不能省略。The question is which of us should go.问题是我们哪一个应该去。The problem was who could do the work.问题是谁能做这项工作。Thats what he is worrying about.那就是他在担心的事。表语从句中引导词的选择表语从句中引导词的选择3.由连接副词引

8、导的表语从句在连接副词 when,where,why,how 等引导的表语从句中，连接副词在从句中作状语。Go and get your coat.Its where you left it.去把你的衣服拿来。就在你原来放的地方。I had neither a raincoat nor an umbrella.Thats why I got wet through.我既没雨衣也没伞。那就是我湿透的原因。That is how mice ruin large scores of grain every year.那就是老鼠每年是怎样损害大量粮食的。表语从句中引导词的选择表语从句中引导词的选择4.

9、由连词because,as if/as though等引导的表语从句It looked as if it was going to snow.看起来好像要下雪了。Thats because we never thought of it.那是因为我们从未想过此事。It seems as though he didnt know the answer.看起来他好像不知道答案。表语从句中引导词的选择表语从句中引导词的选择Answer the following questions using the information from the reading passage as well as th

10、e predicative clauses.What 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 in London was that _ _.2.What was Snow determined to find

11、 out during the 1854 outbreak of cholera in London?What Snow was determined to find out was why _.the cholera outbreak was so severe that more than 500 people died in ten daysthe outbreak of cholera had caused over 500 deaths within ten days3.What were the exact places Snow marked on the map?The exa

12、ct places Snow marked on the map were where _.4.What was the finding that Snow announced?Snows finding was that _ _ _ _.all those who died had lived/all the dead people had lived the water pump was to blame for the spread of cholera/the pump water carried cholera germs/water from the Broad Street pu

13、mp had been infected by wasteDavid 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 practise the conversation.as if,that,what,who,when,how,why,whose,which,whetherA.Absolutely.You may

14、 not believe it,but that was _ happened at the initial stage of our groups research on developing a vaccine for malaria.whatB.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 no

15、t about _ all our theories were equally good,but in deciding _ theory to depend upon.as ifthatas if,that,what,who,when,how,why,whose,which,whetherwhich/what/whosewhetherD.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 v

16、accine without reducing its effect!E.Youre right.At last,we became focused on the key issue,which was _ we had to carry out the research in the first place.which/whathowas if,that,what,who,when,how,why,whose,which,whetherwhy单句语法填空1.He went to the hospital for a medical examination.And that is _ he w

17、as absent from the meeting.why2.The reason why she preferred city life is _ she can have easy access to places like shops and restaurants.that3.All the mistakes I ever made in my life were _ I wanted to say“No”and said“Yes”.when4.As John Lennon once said,life is _ happens to you while you are busy making other plans.what7.The reason why I was sad was _ he didnt understand me.that8.The problem is _ is really fit for the hard job.who9.Thats_I first met her,the small beautiful park.where10.The first time we met each other was _ we studied in that school.when