Unit 1 Science and Scientists Discover Useful Structures (ppt课件)-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 新新人教选择性必修人教选择性必修Book 2 主语主语+系动词系动词+引导词引导词+简单句简单句This is why he did it.表语从句结构表语从句结构P105状态类：状态类：be动词动词,seem,appear,keep,remain.stay.感官类：感官类：look,smell,taste,sound,feel.变化类：变化类：become,get,turn,grow,fall,come,go.Summary 引导词：引导词：从属连词从属连词that,whether,if，as if 连接代词连接代词what,whi

2、ch,who,whom,whose 连接副词连接副词when,where,why,how表语从句只用表语从句只用whether,不用不用if,但可以用但可以用as if引导引导He looked/seemed as if he was going to cry.whyThe reason _ I was sad was _ he didnt understand me.that简单句变复合句练习 1 Is the plan is feasible?It remains to be proved.10 Whether the plan is feasible remains to be prov

3、ed.2 She was chosen as the chairman of the Students Union.It made us very happy.That she was chosen as the chairman of the Students Union made us very happy.3 How will the book sell?This is the puzzle.The puzzle is how the book will sell.4 I dont care about it.Do you have money?I dont care about whe

4、ther you have money or not.(2017江苏，江苏，35)I prefer shutting myself in and listening to music all day on Sundays.Thats _ I dont agree.You should have a more active life.句意：“我更喜欢星期天把自己关在家里听音乐。”“这就是我不同意你的地方，你应该有更积极的生活。”此处用where引导表语从句，where在从句中作状语.(2018南通二模南通二模)He is eager to try something he has never t

5、ried before.Oh,I see.Thats _ hes different from others.考查表语从句。答语句意：那就是他与众不同的地方。答案：where表地点。20(2019安徽省名校联考安徽省名校联考)We students got lost in the forest and decided to remain _ we were and waited for the guide.remain在此是系动词，后面 _we were作它的表语从句。答案：where1 1、表语从句一定是个陈述语序。、表语从句一定是个陈述语序。The question is when wil

6、l he come.The question is when he will come.The question is whether is the enemy marching towards us.The question is whether the enemy is marching towards us.It looked as if had he understood this question.The question is if he has passed the test.The question is whether he has passed the test.2 2、i

7、f可以引导宾语从句，但是不能引导表语从句，可以引导宾语从句，但是不能引导表语从句，引导表语从句表达引导表语从句表达“是否是否”只能用只能用whether：3 3、主句时态和表语从句时态可以不一致。主句时态和表语从句时态可以不一致。The question is who will company me to Paris.The question is why he was absent.What I said was that I would give him a better one.4 4、that 引导表语从句时，和宾语从句不同，引导表语从句时，和宾语从句不同，that 不不 可省略可省略

8、。The problem is millions of people died of illnesses caused by smoking.The boy believes he will travel through space to other planets.as if that what who when how why whose which whetherA.Absolutely.You may not believe it,but that was _ happened at the initial stage of our groups research on develop

9、ing 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.whatas ifthatC.Exactly.The problem was not about _ all our theories were equally good,but in deciding _ _ theory to depend upo

10、n.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 carry out the research in the first place.whetherwhic

11、h/what/whosewhich/whathowwhy as if that what who when how why whose which whetherObjective Clause1.What John Snow showed to the world was _ cholera could be overcome.2.Snows discovery in two particular streets in London was _ the cholera outbreak was so severe that more than 500 people died in ten d

12、ays.3.What Snow was determined to find out was _ the outbreak of cholera had caused over 500 deaths within ten days.how thatwhy作状语作状语不作成分不作成分不作成分不作成分4.The exact places Snow marked on the map were _ all those who died had lived/all the dead people had lived.5.Snows finding was _ the water pump was to

13、 blame for the spread of cholera/the pump water carried cholera germs/water from the Broad Street pump had been infected by waste.wherethat作状语作状语不作成分不作成分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 discove

14、ry in two particular streets in London?Snows discovery in two particular streets in London was that _the cholera outbreak was _.so severe that more than 500 people died in ten days 2.What was Snow determined to find out during the 1854 outbreak in London?What Snow was determined to find out was why

15、_.the outbreak of cholera had caused over 500 deaths within ten days 3.What were the exact places Snow marked on the map?The exact places Snow marked on the map were where _.all those who died had lived/all the dead people had lived4.What was the finding that Snow announced?Snows finding was that _.the water pump was to blame for the spread of cholera/the pump water carried cholera germs/water from the Broad Street pump had been infected by waste