Unit 13 Section B(3a-3b)&self-check课件（人教版九年级全册Unit 13 We're trying to save the earth.)

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Unit 13 Section B (3a-3b&self-check)
人教版九年级全册
Content
Learning objectives
01
Lead-in
02
Presentation
03
Writing
04
Summary
05
Homework
06
目录
Learning objectives
After learning this lesson, you can:
复习并巩固本单元所学词汇。能够掌握后缀构词法。
通过运用正在进行时、现在完成时和被动语态等描述污染、环境保护和循环再利用，来培养学生爱护环境和保护动物的意识。
Lead in
What kinds of environmental problems do you know
air pollution
water pollution
waste pollution
light pollution
land pollution
noise pollution
Presentation
3a
……
Think about the environment in your town/city and complete the chart below.
Which parts of the town/city have a nice environment
Why are they nice
Which parts need to be improved Why
Good environment Why Bad environment Why
Presentation
3a
Which parts of the town/city have a nice environment
Why are they nice
In the south part of the city, the government thought about some ways to cut down pollution.
use reusable bags instead of plastic bags
don’t take wooden chopsticks or plastic forks
sort garbage
Presentation
3a
Which parts of the town/city have a nice environment
Why are they nice
In the south part of the city, the government thought about some ways to let people know.
hand out notices
make videos
post articles on the Internet
make speeches
Presentation
3a
Which parts need to be improved Why
The northern part of the city needs to be improved.
There is rubbish everywhere.
People are throwing litter into the river.
Presentation
3b
Write a letter to the city mayor about
the problems and your suggestions.
In your letter, describe the environmental problems in your town/city.
1. What are the problems
2. Where are they
3. What or who is causing these problems
Then, give suggestions or possible ways to solve the problems.
I think that…
We should/could…
I suggest…
It is a good idea to ….
It is useful/helpful/important/necessary to do sth.
We’d better do sth.
Writing
……
How to save the earth
should/
can …
had
better ...
It’s necessary /
important to …
Save the energy
Cut down the pollution
other
ways
ride bikes or walk instead of…
…
turn off the light /shower
…
keep the balance of ecosystem,
plant more trees, …
the little things in
daily lives
government
and public
We should...
We’re supposed to ...
We can...
It’s important/necessary to...
We’d better...
We’re trying to...
Writing
Dear Mayor,
I’m glad to write this letter to you. I’d like to talk about the environment in our city.
Our city is not as beautiful as before. Environmental problems are becoming more and more serious. The river is dirty. People are throwing litter into the river or in public places like parks. Factories are putting waste into the river and they burn coal. And most of us ride in cars to school. I think it is time to play a part in saving the earth.
First of all, we should let more people know the importance of environmental protection. We’re supposed to save water and energy in our daily life. Second, to cut down air pollution, we should ride a bike or walk to school instead of riding in cars. If it’s far, we can take the bus instead. Third, we shouldn’t throw litter everywhere. We should put it in the bins. As for waste pollution, we should never take wooden chopsticks or plastic forks when buying takeaway food. We can also use reusable bags instead of plastic bags. What’s more, the government should close down the factories that are putting waste into the river .
The earth is our home and it is our duty to take care of it. Let’s take action now! I hope that you can take my advice. Thank you.
sample
Self-check
Write different forms of the words.
Then add more to each group.
pollute —
act —protect —inspire —build —create —
pollution
action
protection
inspiration
building
creativity
fame —
wood —
science —
health —
south —
care —
famous
wooden
scientific
healthy
southern
careful
v.---n.
n.---adj.
different —important—sunny —noisy —harmful —beautiful —woolen —
difference
importance
sun
noise
harm
beauty
wool
slow —
wide —
sudden —
real —
quick —
true —
possible —
slowly
widely
suddenly
really
quickly
truly
possibly
adj.---n.
adj.---adv.
Self-check
2 Match each statement with the grammar structure.
Statement Grammar
The river used to be so clean. Present progressive
We have seen many changes in the environment. Modal verbs
People should take public transportation more. Passive voice
The river is polluted by factories. used to
The air pollution is getting worse and worse. Present perfect
Self-check
3 Write ways to cut down on these kinds of pollution.
Kinds of pollution Ways to cut down
water pollution
land pollution
noise pollution
air pollution
take off the shower while washing hair
take your own bags when shopping
take public transport rather than drive / avoid using air conditioners
keep voice down in public places
Exercise
一、单项选择
I like hiking in the forest because the air is pretty ______.
A. free B. dirty C. polluted D. fresh
2. —How much is the dress —It _____ me 400 yuan.
A. cost B. spent C. took D. paid
In the past few years, great changes _________ in Chongqing.
take place B. took place
C. have taken place D. have been taken place
4. Not only _____ food and clothes to the poor people, but also they helped them build houses.
A. did they gave B. did they give
C. gave they D. give they
D
A
C
B
Summary
Work together and make earth a better place.
Homework
Search more information about whales.
Finish writing.
谢谢
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