人教新课标英语必修三 Unit 4 Astronomy：the science of the stars Reading 2课件(共21张PPT)

课件21张PPT。Unit4 reading2
(language points)Revision according to
begin with
a cloud of dust
in time
cool down
chain reaction
as well as
lay eggs
give birth to
in one’s turn
prevent …from
as a result of
depend on 根据；按照以…开始；起源于一团尘埃及时；终于冷却连锁反应和下蛋产生；分娩轮到某人；接着阻止；制止由于；因此依靠，依赖；取决于1.What is more important is that as the earth cooled down, water began to appear on its surface.
更为重要的是，当地球冷却下来的时候，它的表面开始出现了水。
2.This produced a chain reaction, which made it possible for life to develop.
这就产生了连锁反应，使得生命发展成为可能。
3.As a result of this, many scientists believe the earth may become too hot to live on.
因此，许多科学家认为地球可能会变得太热而不适合生存。
Language points1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
What is even more important is that as the earth cooled down, water began to appear on its surface.
[考点] what引导的主语从句，第一句what 在从句中作become 的宾语，第二句what在从句中作主语。[考例1] _____ was most important to
her, she told me, was her family.（山东
）
A. It B. This C. What D. As
[点拨]选C。what引导主语从句，并在
从句中作主语。[考例2] ______ is known to us all is that the 2008 Olympic Games will take place in Beijing.（福建）
A. It B. What
C. As D. Which
[点拨]选B。 what引导主语从句并且在从句中主语。2. The earth became so violent that it
was not clear whether the shape would
last or not.
1) violent 猛烈的，激烈的
2) whether可以引导主语从句、表语从句、宾语从句和同位语从句;而if只能引导部分宾语从句。
He asked me whether / if I could lend him my bike.
Could you tell us whether / if it snows in winter in Australia?(NMET?1996) 1._________?we’ll?go?camping
?tomorrow?depends?on?the?weather.
2. I have just discuss ________ we should give him enough help.
3. They had no idea ________ or not?they could achieve their goals.Whetherwhetherwhether3. …the earth may become too hot to live on.
地球可能会因此变得太热而不适合生物的生存。 有关too的一些用法
too作 “太” 讲。
There is too much water.水太多了。
This shirt is too large for me. 这衬衫我穿起来太大。
The problem is rather too hard for me. 这个问题对我来说太难了。2) 当“too ＋adj.(形容词)＋inf.(动词不定式)”时,有两种不同的意义,一种为“太……以至(不)……”, 在翻译时要加上一个否定词;另一种是“太……”,语意肯定, 但too后的形容词常用ready, glad,pleasant,heavy, beautiful等。The question is too hard to understand.问题太难,理解不了。
He is too proud to see his own shortcomings. 他太骄傲了以至于看不到自己的缺点。
I am too pleased to hear from you further. 我非常欢迎你再来信。
They are but too glad to do so. 他们非常喜欢这么做。
You are too ready to find fault with others. 你太爱挑别人的毛病了。
3) 在“cannot／can never...too”结构中，应理解为“无论怎样……也不会过分”。
You cannot praise him too highly. 你无论怎样表扬他也不过分。 We cannot be too careful in doing experiments. 我们做实验无论怎样小心也不过分。
You can never be too careful of your health. 你越注意健康越好。用适当的介词填空。
1. According ___ our records, the books you have borrowed should now be returned to the library.
2. To begin _____, we ought to know what we are studying for.
3. When the fire broke out in the movie theater, people lost their heads and ran ___ all directions.towithin4. The car came to a stop just ___ time to prevent an accident.
5. The smell of rain and wetness was everywhere. It seemed to fill me _____ energy.inwith6. When you are young, you dream about all sorts ___ things.
7. He grows not only vegetables but also flowers in his garden; that is, he grows flowers _________ vegetables.
8. Can you tell me how China is different ______ your country?ofas well asfrom9. ___ the past he had to read by candlelight.
10. She gave birth ___ a fine healthy baby last week.
11. In the teacher’s class, the students often answer his questions ___ turn.
Intoin12. What can we do to keep the disease ______ spreading?
13. As a result ___ what had happened, we decided to change the rules.
14. I’ ve been old enough to earn my living, so I’ll no longer depend _________ my father.fromofon / upon