(共80张PPT)
Words study
Warming up
Answer the questions:
1.What other things do we use energy for
2.Where does all this energy come from
Pre-reading
Have you ever seen a greenhouse
Reading
Answer the questions:
1.Who wrote the magazine article What is the name of the magazine
2.What are the names of the three scientists mentioned in the article
3.What do they think about global warming Do they agree with one another
4.What are the two graphs about
5.What is the main topic of the article
Word Study
compare
Compare to/ with
Compared to/with many women, she was indeed very fortunate.
Compare A with B
If you compare her work with his, you will find hers is much better.
Compare A to B
Poets have compared sleep to death.
Come about
Come about: Take place; happen
Please tell me how the accident_____. I am still in the dark. (2005江西)
A. came by B. came upon
C. came to D. came about
得到，获得
发现， 碰上
达到
result in 导致 造成=lead to
The accident resulted in three people being killed.
这一事故导致他的死亡。
The accident resulted in his death
Result from
●result from 由…产生，发生
injuries resulting from a fall.
The accident ______ the death of two passengers.
A. resulted from B. resulted in
C. resulted of D. resulted with
Consequence
in consequence 因此
as a consequence 结果
as a consequence of 由于…的结果
range
in /within range 在射程之内
out of / beyond range 在射程之外
Build up
Build up the business
Sediment (沉淀物)builds up on the ocean floor.
This built up my hope after the interview.
Develop 扩大 发展
Collect 累积 收集
增加 支持 树立
The earth is becoming warmer
-but does it matter
Enjoy a song
down as she goes
Down as she goes From up here is where she glows the most Turns from silver into gold And the story is left untold Down as she goes Too much downfall will she hold Turns from shimmer into spoilt Science fiction is going old I was lost and never found Into pieces I am breaking down I was lost and never found Into pieces I am going down Hurts the soul Hurts the soul Down did she go From up there is where she glowed the most Turned from shiver into cold Time is clicking are we getting old
What are they
What is the
function of them
Greenhouse gases
Carbon dioxide
Methane
Water vapor
The atmosphere
What causes the global warming
Main ideas of each part Writing techniques
Introduce a debate over
the issue of global warming
Raising a question
Illustrate how global
warming comes about
Giving examples,
using graphs, explanation
List two different attitudes
towards global warming
Giving examples
It’s up to readers to think and
decide whether people should
do something about global
warming or not
Using a question, leaving
Readers to think over the
issue
Using language
what can we do about
global warming
Earth Care’s suggestion Can you carry it out
Reading task (page 66)
Exercise on page 67 part 2
Water pollution
garbage
Air pollution
starvation
waste from cities
smoke from factories
smoke from cars
What cause(s) air pollution
And what’s the result
Viet Nam War
Iraq War
We can reduce the amount of garbage/rubbish by producing and buying products that use less packaging or wrapping. We should never throw garbage in the streets or in nature. We should also try to recycle as much as possible.
What can we do
rubbish
box
×
×
basket
clean
People cut down too many trees.
How about nature
What’s the result
Deforestation
rain water washes the soil away wind blows the soil away
no trees to hold the soil
Desertification
one-off
What can we do
↖
↘
↙
↗
solar energy
Help me, help you, help everyone.
Return GREEN to the earth!
Help me, help you, help everyone.
Return GREEN to the earth!
The usage of it
用作形式主语，代替主语从句
It is clear ( obvious, true, possible, certain....) that .....+(should) do
It is very clear that he’s round and tall like a tree.
用作形式主语，代替主语从句
2. It is important ( necessary， right， strange， natural...) that …+(should) do
It is important that we (should) learn English well.
用作形式主语，代替主语从句
3. It is said (reported/learned/believed/thought/known/told/hoped...) that ...
It is reported that another earth satellite has been put into orbit.
用作形式主语，代替主语从句
4. It is suggested (ordered/Demanded
/insisted/commanded.. ) that +(should) do
It is suggested that the meeting ( should ) be put off.
用作形式主语，代替主语从句
5. It is time ( about time ，high time ) that ... + should do
did
* It is time that children should go to bed.
= It is time that children went to bed.
用作形式主语，代替主语从句
6. It (this) is the first ( second ... ) time (that) ... + 完成时态
It is the first time I have been here.
= This is the first time I have been here.
用作形式主语，代替主语从句
7. It is a pity ( a shame /an honor/a good thing/a fact,/a surprise/... ) that ... + (should) do 表出乎意料“竟然”
陈述语气
It is a pity that such a thing ( should ) happen in your class.
这种事竟然发生在你们班上，真是遗憾！
It is a pity that he is ill. 他生病了真遗憾！
用作形式主语，代替主语从句
8. It happens (seems, looks, appears ) that...
It happened that he met his teacher in the street.
It is kind ( of sb. ) to do sth.
bad ， brave ， careless， clever ，cruel ， foolish…表示逻辑主语特征的形容词
It is kind of you to say so.
用作形式主语，it代替不定式
2. It is necessary ( for sb. ) to do sth.
important， necessary， natural, easy ， safe ， common …
It is important for her to come to the party.
用作形式主语，it代替不定式
3. It takes sb. ... to do sth.
“做．．．要花费某人．．．”
It took thousands of people many years to build the Great Wall.
用作形式主语，it代替不定式
It is no good (use ) doing sth.
It is no good learning English without speaking English.
用作形式主语，it代替V-ing
强调句型
It is not until + 被强调部分 + that ...
It was not until she took off her dark glasses that I realized she was a famous film star.
It is .... since ...
(瞬间动词, 时间状语为一段时间)
It is ( has been ) 5 years since his father died.
It is years since I enjoyed myself so much.
强调句型
It is ... when ...
when 引导的是一个时间状语从句
It was 5 o’clock when he came here.
强调句型
It be ... before ...
It was 3 days before he went to Beijing.
强调句型
It doesn’t matter whether ( if ) ...
It doesn’t matter if they are old.
强调句型
It looks ( seems ) as if ...
该句型中it无意义
如果与事实不相符合，则用虚拟语气。
It looks as if he is ill.（真的病了）
It looks as if he were ill. （没有生病）
强调句型
exercise
1.It took us over an hour along the street.
A. walk B. to walk C. walking D. walked
2.I think it a great honor to visit your country. A. to invite B. inviting C. having invited D. to be invited
3.Many people now make a rule to buy cards for their friends before Christmas. A. themselves B. it
C. that D. this
is very clear to everyone that he‘s round and tall like a tree. A. This B. What
C. That D. It
5.In the United States, bus travel doesn‘t cost much as train travel, A. don’t they B. does it C. do they D. doesn't it
6.Someone is at the door, who is A. this B. that
C. it D. he
7.—It is raining cats and dogs. — . A. So it is B. So is it C. Neither it is D. Neither is it
8.—My home is in that tall building over there. — A. Can it see B. Can see it C. Can be seen it D. Can it be seen
raining hard for 3 hours without stopping. A. It is B. It was
C. It has been D. It had been
10.—Has the boy got his bicycle now —Yes, the police gave . A. him to him B. it to it C. it to him D. him to it
11.—Boy, —It is, looks like spring is coming soon. —Yeh, It'll just be a few more weeks. A. it's really a nice day today, isn't it B. what kind of weather are we going to have today C. do you think it is going to rain today D. what' it like outside today
12.It is important their offer. A. reject B. rejects
C. to reject D. rejecting
13.Has been decided when we are to hold the sports-meeting A. that B. this C. it D. what
14.—Did Li Lei call me while I was out —Yes, it was that called you. A. him B. he
C. who D. whom
15.Nothing is wrong with the radio A. isn‘t it B. is that
C. is it D. isn't that
16.I don't know makes her afraid of having her business discussed. A. what it is about Mary that B. that is it abut Mary what C. what is it about Mary that D. that is about Mary what
17.Which sentence is wrong A.I felt it impossible for him to take the exam. B.I found it impossible that he might take the exam. C.I thought that he might not take the exam. D.In my opinion he might take the exam.
18.I don't think difficult for a Chinese student to master a foreign language within five years A. that B. it C. too D. very
19.It‘s the second time you late this week. A. arrive B. arrived
C. have arrived D. had arrived
20.It will not be we meet again. A. long before B. before long C. soon after D. shortly after
