(共35张PPT)
人教新目标版 九年级全册
Unit 13 We’re trying to save the earth.
Section B 3a-self check
Learning objectives
Knowledge objectives:
1. 熟练掌握以下词汇和短语
be full of, throw…into, play a part in, throw away, cut down, make a difference, lead to, cut off, not only…but also…, be harmful to, at the top of, take part in, pay for, take action, put sth. to good use.
2. 熟练掌握以下句型
1. The river used to be so clean.
2. We have seen many changes in the environment.
3. The air pollution is getting worse and worse.
Skill objectives:
1. 复习本单元所学词汇及语法, 能运用本单元词汇和句式谈论环境污染和环境保护的话题。
2. 能结合本单元的环境问题和环保措施，完成写作任务。能够识别句子结构，熟练掌握现在进行时、现在完成时、被动语态、情态动词和used to 的用法。
3. 通过写作范例展示，由简入难，使学生逐步掌握写作技巧，梳理成文，能写一篇关于环境污染与环境保护的短文。
Emotional objectives:
运用所学句式描述污染、环境保护和循环再利用，来培养学生爱护坏境和保护动物的意识。
Thinking quality objectives:
了解环境问题的现状,起因以及解决方法,激发学生强烈的社会责任感和对未来发展的思考。
Lead in
What kinds of environmental problems do you know
Many kinds of pollution
noise pollution
air pollution
water pollution
Waste of energy
Forget to turn off the tap, the shower or the light and waste paper(浪费纸张).
Break the balance of ecosystem
cut down too many trees
kill the animals
The earth is badly polluted. The earth is in danger.
What should we do to save the earth
Let’s take action(采取行动).
Turn off the lights/water when you leave a room
Recycle books and paper.
put old things to good use
Take the buses/bikes or walk instead of driving cars.
plant more trees
make laws to take care of animals
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
Pre-writing
Suggested answers:
Good environment Why Bad environment Why
park
the air is clean
streets
so many trees
restaurants
clean and tidy
river
a lot of rubbish
so many cars
air
too many
factories
streets
What caused the environmental problems
Problem
pollution
waste of
energy
break the balance
of ecosystem
waste water
waste gas
plastic bags
…
forget to turn off the light
or shower
…
cut down too
many trees
kill the animals
…
the environment around us is becoming
worse and worse…,we can't see…,the air is so…
How to save the earth
should/
can …
had
better ...
It’s necessary /
important to …
Save the energy
Cut down the pollution
other
ways
throw litter in the bin
take the reusable bags…
ride bikes or walk instead of…
turn off the light /shower while…
put old things to good use
recycle the used books or paper…
keep the balance of ecosystem,
plant more trees, make laws to …
close down the factories that…
the little things in daily lives
govern-ment and public
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.
What are the problems
Where are they
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 ...
While-writing
1. 体裁：应用文（书信）
2. 话题：保护环境
3. 时态：一般现在时
4. 人称：以第一人称为主
Writing tips:
Writing guidance
Beginning
Body
Ending
As we all know, today there is more and more pollution and the environment is becoming worse and worse…
facts
give advice
call on
should /need /had better do…
It’s necessary for us to do…
We mustn’t/ shouldn’t/ aren’t supposed to do …
It is everyone's duty to …
The government should… …
I believe if everyone can make their effort, our world will be much better.
Cut down the pollution
Save the energy
other ways
Good Sentences
Everyone in this town should play a part in cleaning it up.
To cut down air pollution, we should take the bus or subway instead of driving.
The river used to be so clean.
Let’s take action now!
All these small things can add up and become big things that can improve the environment.
Sample writing:
Dear Sir/Madam,
I have lived in this town ever since I was born and I love this town very much.
I think that there are beautiful areas in this town, but there are also areas that aren’t attractive, like the rubbish disposal areas at the bottom of our apartment blocks. There is rubbish coming out of the bins, and flies, cockroaches and rats running all over the rubbish. It is unpleasant to look at, smelly, and it makes the environment very unhealthy.
时态用一般现在时，以第一人称为主
注意书信的格式
多种句型陈述问题
The problem is that the rubbish collectors do not come often enough to collect the rubbish. The people living here may also be throwing away too much rubbish.
We could try to ask people to produce less rubbish. I suggest that rubbish collectors collect rubbish more often as well.
I believe that a better environment can be created in this town and we should all work together to achieve it.
Yours faithfully,
Wang Xi
注意书信格式
提出产生问题的原因，并给出建议
提出希望和号召
小试牛刀
我们生活的地球正面临着巨大的环境压力，如空气污染、水污染、固体废弃物污染、动物濒临灭绝等问题。因此, 将环保行动渗透到日常生活是我们每个人的责任。请你选择其中的一个问题，自拟题目, 写一篇120词左右的英语短文,谈谈引起问题的原因，并倡导公众如何从点滴做起来解决问题，使我们的世界变得更美好。
写作审定
审体裁:
审人称:
审时态:
审要点:
审背景:
说明文
第一人称
一般现在时
1.选择一个环境问题
2.引起此问题的原因
3.如何从生活的点滴做起来解决问题
4.词数120词左右
反映环境问题，倡导环境保护
Apossible sample（提纲）
1.选择一个环境问题
air pollution problem
2.引起此问题的原因
(1) The black smoke from some factories.
(2) People take the cars to school or work.
(3) Some people somke.
3.如何从生法的点滴做起来解决问题
(1) Stop the factories giving out black smoke.
(2) Ride bikes or walk instead of driving.
(3) Don’t smoke in public.
(4) Plant more trees, recycle books and paper...
Air Pollution Problem
At present, more and more people pay attention to the environment around us. As we know, the nice environment is good for our life and health. However, there are some kinds pollution problems in our life, like air pollution, noise pollution, water pollution and waste pollution. Now I want to talk about the air pollution.
Beginning:开门见山，直击主题；用“百里挑一” 的开头方式引入要说明的 air pollution problem
Sample writing:
The air is badly polluted. Here are some reasons. First, the factories that burn coal pollute the air with a lot of black smoke. Second, more and more people take cars to school or work. Third, some people smoke.
Body：由主到次地有序说明了造成空气污染的三点原因。
There are some methods to solve the problem. First of all, we should ask the factories stop giving out black smoke into air. Next, we’d better ride bikes or walk instead of driving to school or work. The advantages of bike riding or walking are that it’s good for health and it doesn’t cost anything. If it’s far, I suggest we could take the bus. Besides, I thinks smokers shouldn’t smoke in public.
Body:对上面三点原因依次给出了建议。
I think everyone should play a part in solving the air pollution problem. It’s sure that our actions can make a difference and lead to a better future.
What’s more, it’s a good idea to plant more trees and flowers. Planting trees and flowers not only make air cleaner, but also makes our environment more beautiful. Finally, we need to recycle books and paper and stop using paper napkins. That can help us cut down fewer and fewer trees.
Body:又从积极正向的方面说明了两点改善空气污染问题的建议。
Ending:倡导语，对未来表示期望。
Self Check
1
Write different forms of the words. Then add more to each group.
v. — n. n. — adj.
pollute— fame—
act— wood—
protect— science—
inspire— health—
build— south—
create— care—
pollution
famous
action
protection
inspiration
building
creation
creativity
wooden
scientific
healthy
southern
careful
adj. — n. adj. — adv.
different— slow—
important— wide—
sudden—
real—
difference
importance
slowly
widely
suddenly
really
Add more words to each group.
Group work
v.—n. : educate—education, meet—meeting, paint—painting
n.—adj. : wool—woolen, north—northern, wind—windy
adj.—n. : silent—silence, patient—patience, absent—absence
adj.—adv.: actual—actually, quick—quickly, sure—surely
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
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
Suggested answers
Kinds of pollution Ways to cut down
water pollution
land pollution
noise pollution
air pollution
ask factories not to throw waste into the rivers; remind people not to litter
ensure that factories throw away industrial waste in a responsible way; try not to use plastic bags when shopping
build airports away from places where people live
encourage people to use public transportation instead of driving; reduce the number of factories that burn coal
Homework
假设你叫李文，是无锡阳光中学 (Wuxi Sunshine Middle School)的一名学生。今年暑期，你将代表你校赴瑞士参加“模拟联合国”会议并作发言，此次会议主题是A Greener World。你草拟了发言流程图，请根据下图写一篇英文发言稿。
注意事项：
1. 发言稿须根据流程图自拟，要求语句通顺、意思连贯、符合题意；
2. 流程图中括号部分非限定性内容，仅供参考；
3. 词数在90个左右;
4.发言稿中不得使用真实的个人及学校信息。
谢谢
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