高中英语Unit 1 Science and Scientists教学演示课件ppt

这是一份高中英语Unit 1 Science and Scientists教学演示课件ppt，共20页。PPT课件主要包含了Lead in，review，链接教材，concept，表语从句的引导词，what，as if，that，how，why等内容，欢迎下载使用。
1、lead in : 课文例句与系动词回顾2、cncept: 表语从句的概念与引导词3、imprtance and difficulties: 表语从句的重难点4、exercise in the textbk: 教材练习5、Extended training: 扩展训练
The truth was that the water frm the Brad Street pump had been infected by waste.
predicative clause表语从句
事实/真相 的内容是….
状态类：be动词，seem, appear, keep, remain, stay…
感观类：lk, smell, taste, sund, feel…
变化类：becme, get, turn, grw, fall, cme, g…
Linking verbs
判断表语的主要依据就是表语在系动词之后 。(系表结构）
1.（教材P2）One thery was that bad air caused the disease.
2.（教材P5）Yu may nt believe it, but that was what happened at the initial stage f ur grup’s research n develping a vaccine fr malaria.
3.（教材P5）What Snw was determined t find ut was why the 1854 utbreak f chlera in Lndn culd have caused ver 500 deaths within ten days.
4.（教材P5）We realised that what we cared abut was nt what aspect we needed t develp a thery in, but rather hw we can reduce the cst f a vaccine withut 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_______。
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。
表语从句放在系动词（也称连系动词）之后，充当复合句中的表语，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, lk, remain, seem等。
Imprtance and difficulties
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：①无意义；②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 questin, truble, prblem, result, chance, suggestin, idea, reasn 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 reasn fr his absence is that he hasn’t been infrmed.他缺席的原因是他没被通知。The pint is whether we shuld lend him the mney.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wh, what, which, whm, whse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 questin is which f us shuld g.问题是我们哪一个应该去。The prblem was wh culd d the wrk.问题是谁能做这项工作。That’s what he is wrrying abut.那就是他在担心的事。
3.由连接副词引导的表语从句在连接副词 when, where, why, hw 等引导的表语从句中，连接副词在从句中作状语。G and get yur cat. It’s where yu left it.去把你的衣服拿来。就在你原来放的地方。I had neither a raincat nr an umbrella. That’s why I gt wet thrugh.我既没雨衣也没伞。那就是我湿透的原因。That is hw mice ruin large scres f grain every year.那就是老鼠每年是怎样损害大量粮食的。
4.由连词because, as if/as thugh等引导的表语从句It lked as if it was ging t snw.看起来好像要下雪了。That’s because we never thught f it.那是因为我们从未想过此事。It seems as thugh he didn’t knw the answer.看起来他好像不知道答案。
Exercise in the textbk
Answer the fllwing questins using the infrmatin frm the reading passage as well as the predicative clauses.
What was it that Jhn Snw shwed t the wrld?→What Jhn Snw shwed t the wrld was hw chlera culd be vercme.
1. What was Snw's discvery in tw particular streets in Lndn? Snw's discvery in tw particular streets in Lndn was that ____________________________________________________ ____________________________________________________.2. What was Snw determined t find ut during the 1854 utbreak f chlera in Lndn? What Snw was determined t find ut was why ________________________________________________________________________________________________________.
the chlera utbreak was s severe that mre than 500 peple died in ten days
the utbreak f chlera had caused ver 500 deaths within ten days
3. What were the exact places Snw marked n the map? The exact places Snw marked n the map were where ___________________________________________________.4. What was the finding that Snw annunced? Snw's finding was that ______________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________.
all thse wh died had lived / all the dead peple had lived
the water pump was t blame fr the spread f chlera/ the pump water carried chlera germs/ water frm the Brad Street pump had been infected by waste
David is talking t Maria abut their scientific research prject. First cmplete David’s lines (A-E), using the wrds in the bx. Then put David’s lines in the crrect rder and practise the cnversatin.
as if, that, what, wh, when, hw, why, whse, which, whether
A. Abslutely. Yu may nt believe it, but that was ________ happened at the initial stage f ur grup's research n develping a vaccine fr malaria.
B. Yes, it is. And it seemed _______ all the theries were useful, but the fact was _____ we culdn't persuade ne anther that ne thery was better than anther.C. Exactly. The prblem was nt abut ________ all ur theries were equally gd, but in deciding _______________ thery t depend upn.
which/ what/ whse
D. We realised that what we cared abut was nt ___________ aspect we needed t develp a thery in, but rather ______ we can reduce the cst f a vaccine withut reducing its effect!E. Yu're right. At last, we became fcused n the key issue, which was ______ we had t carry ut the research in the first place.
which/ what
Extended training
1. He went t the hspital fr a medical examinatin. And that is _______ he was absent frm the meeting.
2. The reasn why she preferred city life is ______ she can have easy access t places like shps and restaurants.
3. All the mistakes I ever made in my life were _______ I wanted t say “N” and said “Yes”.
4. As Jhn Lennn nce said, life is _______ happens t yu while yu are busy making ther plans.