人教版（2019）选择性必修第二册Unit 1 Science and scientists Discover Useful Structures 课件(共13张PPT)

(共13张PPT)
人教选择性必修第二册
Unit 1
Discover Useful Structures
1
2
To recognize and summarize the structure and function of the predicative clause.
To understand and use the predicative clause correctly in context.
目标一: To recognize and summarize the structure and function of
the predicative clause.
Activity 1: Read and identify the clauses in the following science quotes.
Understanding science and pushing the boundaries of science is what makes me immensely satisfied. ——Bill Gates
The next major explosion is going to be when genetics and computers come together. ——Alvin Toffler
The doctor has been taught to be interested not in health but in disease.What the public is taught is that health is the cure for disease.
——Ashley Montagu
Research is what I'm doing when I don't know what I'm doing.
——Wernher von Braun
你是根据什么来判断哪些是从句的？
这些从句分别是什么从句？
你是根据什么判断哪些从句是表语从句的？
The main basis for judging the predicative is that it comes after the linking verb.
★变化类:become, get,turn,grow,fall,come,go..
Linking verbs
★状态类:be动词,seem,appear,keep,remain,stay...
★感官类:look,smell,taste,sound,feel...
Activity 2: Underline all the examples in the reading passage where noun clauses are used as the predicative. Then state their meaning and functions.
One theory was that bad air caused the disease.
Another was that cholera was caused by an infection from germs in food or water.
It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day.
The truth was that the water from the Broad Street pump had been infected by waste.
思考表语从句的结构？
Structure: 主语+系动词+引导词+简单句
Activity 3: Answer the following questions using the information from the reading passage as well as the predicative clauses.
EXAMPLE
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 Snow's discovery in two particular streets in London
Snow's discovery in two particular streets in London was that _______________.
2 What was Snow determined to find out during the 1854 outbreak of cholera in London
What Snow was determined to find out was 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
Snow's finding was that _______________.
Suggested Answers:
1 the cholera outbreak was so severe that more than 500 people died in ten days
2 the outbreak of cholera had caused over 500 deaths within ten days
3 all those who died had lived / all the dead people had lived
4 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
表语从句的引导词有哪些？
如何确定表语从句的引导词？
When,where,why,how...
表语从句的引导词
连词
在从句中不作成分
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
that,whether as if,
as though,because...
what/whatever, which/whichever, who/whoever, whom,whose...
引导词在表语从句中充当的成分 引导词 备注
主语 根据句意选择
宾语、表语
定语
状语
不充当成分
who,what,which,whoever,whatever,
whichever
whom,who,what,which,whoever,
whatever,whichever
whose,what,which
when,where,why,how
that,whether,as if,as though,because
目标二: To understand and use the predicative clause correctly in context.
Activity 1: David is talking to Maria about their scientific research project. First complete David's lines (A-E), using the words in the box.
as if that what who when how why whose which whether
A: Absolutely! You may not believe it, but that was ______ happened at the initial stage of our group's research on developing a vaccine for malaria.
B:Yes, it is. And it seemed______ all the theories were useful, but the fact was______we couldn't 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 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: You're right. At last, we became focused on the key issue, which was ______we had to carry out the research in the first place.
why
what
as if that
whether
which/what
which/what/whose
how
Activity 2: Then put David's lines in the correct order and practise the conversation.
Maria: 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:_________________
C
B
E
D
Activity 3: Work in pairs and then answer the questions through the context.
1) What was David's group's research
2) What was the problem
3) What was the key issue
4) What did they care about
What they cared about was how they could reduce the cost of a vaccine without reducing its effect.
David's group's research was that they wanted to develop
a vaccine for malaria.
The problem was that they had to decide which theory to
depend upon.
The key issue was why they had to carry out the research
in the first place.
Share the structure and function of
the predicative clause.