(共23张PPT)
Unit 1 Science and Scientists
Period 3 Discovering useful structures
The Predicative Clauses
人教版 选择性必修二
人教版 选择性必修二
Period 3 Discovering useful structures
The Predicative Clauses
Unit 1 Science and Scientists
1. Enable the Ss to master the usage of predicative in this unit.
2. Enable the Ss to use the predicative patterns flexibly.
3. Train the Ss to apply some skills by doing the relevant exercises.
Teaching Goals
Grammar focus:
Predicative clauses
The question is who will do it.
定义:表语从句放在 之后,充当复合句中的 。
结构:
It seems that it is going to rain.
It looks as if he is unhappy today.
自我探究
主语+系动词 +
引导词 +
简单句
系动词
表语
Underline all the examples in the reading passage where noun clauses are used as the predicative. Then state their meaning and functions.
1.One theory was that _____________________________________
2. Another was______________________________________
3. The truth was__________________________________
that cholera was caused by an infection from germs in food or water.
bad air caused the disease.
that the water from the Broad Street pump had been infected by waste.
S+V+P
link verb
Predicative 表语
Predicative is used ______ the link verb.
A sentence which is used as predicative is Predicative Clause表语从句.
①be动词;
②感官动词:sound, taste,
smell, look, feel;
③表示变化的词:go,
get, turn, become.
behind
It look as if…
It turned out that…
总结
Grammar focus:
表语从句之引导词
1.引导词的用法 (that)
that在表语从句中 ,又 且______
省略。
1.The fact is that he hasn’t yet recovered from illness.
2.The reason why he has to go is that his mother is ill in bed.
既不充当成分
没有意义
不可
whether在表语从句中表 ,
但_______句子的成分。
1.What the doctor really doubts is whether my mother will recover from the serious disease soon.
2.The question is whether it is
worth doing.
“是否”
2.引导词的用法 (whether )
不充当
She asked me if /whether she could borrow these books .
The question is if/whether we can rely on him.
在表语从句中, 表“是否” 时, 只能用“whether”不能用“if”。
I don’t know _______________ he wants to go alone.
The problem was ________ __he could come on time.
√
if or whether
if/ whether
whether
√
what 在表语从句中充当______________ 表示____________________________.
1. The question is what caused the accident.
2. That mountain is no longer what it used to be .
3. What he told you was what
had been discussed at the meeting.
主语、表语、宾语
什么,什么样子,或所…的(人或事)
3.引导词的用法 (what)
主语
表语
宾语
who 在表语从句中充当______________表示____.
The problem is who could do the work
2. My trouble is who (whom) I
can turn to.
主语、宾语或表语
谁
4. 引导词的用法 (who)
主语
宾语
which 在引导表语从句时,常充当_____________
表示 。
I read about it in some book or another,but what I don’t know is which (book) it is.
定语,表语
其/当中哪一个
5.引导词的用法 (which)
定语
由as if ,as though引导表语从句,表示 。句子中的系动词常用look, appear, seem等。
1.It looks as if it was going to rain.
2.The young man with long hair looks as if he were a girl.
6.引导词的用法(as if, as though)
好像
当主句的主语为reason,或者是由why引导的从句时,与它们相关的表语从句用_________,而不能由__________ 引导; because 引导表语从句时只能用于___________________________________句型中.
1.The reason why I was late was that I missed the train.
2. I was late. It/That/This was because I missed the train.
that
because
It/That/This is /was because…
7 引导词的用法(the reason why… is that/ It is because…)
当表语从句中主语、宾语、表语具备,但是还是要表示疑问含义,可以判断句子中缺少状语,常常用相应的特殊疑问词引
导,有 why 表 , when表 ,
where表 , how表 等。
This is how he did it.
That is why the brothers wanted to make a bet.
That’s why we’ve given you the letter.
8. 引导词的用法(why/when/where/how)
为什么
在…时候
在哪里
怎么样
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
Snows 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_______________________________________
more than 500 people died in ten days.
the cholera outbreak was so severe in the two particular streets
all those who died had lived
the pump water carried cholera germs..
David is talking to Maria about their scientific research project. First complete David's lines (A-E, using the words in the box. Then put David's lines in the correct order and practice the conversation.
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 Cary out the research in the first place.
as if that what who when How why whose which whether
what
as if
that
whether
whose
which
how
why
David is talking to Maria about their scientific research project. First complete David's lines (A-E, using the words in the box. Then put David's lines in the correct order and practice 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:__________________
B
C
E
D
感谢您的观看
谢谢
21世纪教育网(www.21cnjy.com)
中小学教育资源网站
兼职招聘:
https://www.21cnjy.com/recruitment/home/admin