Unit 13 We're trying to save the earth Section A （1a-1c ）课件(共26张PPT)

(共26张PPT)
Unit 13
We are trying to save the earth.
Section A 1a-1c
Objectives
By the end of the class, students should be able to:
Talk about air pollution, water pollution , noise pollution and waste pollution.
Think about ways of protecting the environment.
learn to use the sentence patterns
...used to...but now should do sth.
Pollution!
water pollution
land pollution
air pollution
light pollution
noise pollution
What kinds of pollution do you know
What causes the pollution
loud music，planes，building houses，cars,
mobile phones, factories
Cars, factories, smoking, building houses
rubbish, littering, ships, factories
litter n. : waste or rubbish
v. : to be spread around a place, making it look untidy
e.g. Books and newspapers littered the floor.
The floor was littered with books and newspapers.
machines, crowds
burning, power plants
industrial waste, pesticides
What causes these kinds of pollution
People throw litter into the river. …
noise pollution
air pollution
water pollution
Factories give out the harmful gases. …
Talk about the reasons for each kind of pollution. Use the words in 1a.
There are a lot of cars that make big noise on the street. …
The world’s problem
What kind of pollution are they
air pollution
water pollution
desertification
Natural disasters
Endangered animal
Pollution
land/waste/soil pollution
noise
pollution
What can you see in the pictures
What kinds of pollution are they
The earth is polluted.
We're harming our planet in so many ways.
noise pollution
water pollution
air pollution
loud sound
car
plane
...
What caused these problems
factory
littering
ship
car
ship
factories
plane
1a
Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.
noise pollution
____________
____________
____________
____________
air pollution
___________
___________
___________
___________
water pollution
____________
____________
____________
____________
loud music
planes cars
mobile phones
factories
cars
smoking
ships
factories
littering
rubbish
building houses
building houses
loud music cars rubbish planes littering ships factories smoking building houses mobile phones
machines, crowds,
square dance …
burning, power plants…
pesticides(农药)， sewage(污水)…
1b
Listen and complete the sentences.
What was the problem
The river was _____________. Even the bottom (底部) of the river was full of _________. There were no more ______ for fishermen (渔民) to catch.
really dirty
rubbish
fish
What caused the problem
People are throwing _______ into the river. Factories are putting ______ into the river.
How should the problem be solved
We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river.
litter
waste
government
close down
clean up
Tony: Hey, Mark, maybe we could go swimming in the river later this afternoon.
Mark: I don’t think I want to go, Tony.
Tony: Why not
Mark: I was there last weekend and the river was really dirty. Even the bottom of the river was full of rubbish, and there were no more fish for fishermen to catch.
Tape scripts
Tony: No way! It used to be so clean. In fact, it has always been the nicest river in this town.
Mark: Not anymore. I think people are throwing litter into the river. Factories are also putting waste into the river.
Tony: That’s terrible! We should write to the government. They should close down the factories.
Mark: Good idea! But I think everyone in this town should help to clean up the river, too. Everyone should play a part, not just the government.
Tape scripts
真的假的？不是吧！
扮演角色；起作用
Mark: The river was dirty. Even the bottom of
the river was full of rubbish.
Tony: But it used to be so clean!
Mark: Yes, but people are throwing litter into the river.
Tony: Everyone in this town should play a part in cleaning it up!
Role-play the conversation. Then make your own conversations about the kinds of pollution in 1a.
1c
waste
water
Make your own conversation.
1c
Pair work
Make up a conversation about the kinds of pollution in 1a.
A: …
B: …
A: …
B: …
problem
specific description of the problem
past condition
Reasons for the problem
Solutions to the problem
This is turning beautiful places into ugly ones.
turn… into… 把……变成……
e.g. The icy rain seemed like to turn into
snow.
渐渐地冻雨又变成雪花的模样。
Language points
2. It’s good for health and it doesn’t cost anything!
cost v. 花费；使付出
指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。
e.g. The new shirt cost Mr Wang 200 yuan.
王先生花了200元买了新衬衫。
How much does the new computer
cost 新电脑花了多少钱？
take, spend, pay & cost
take，spend，pay和cost都可以表示“花
费”，但它们的用法各有不同。
1) take多表示花费时间，常用于It takes sb. some time to do sth.这一句型中，其中it作形式主语。
e.g. It usually takes me 40 minutes to
cook the dinner.
2) spend多表示花费时间和金钱，主语通常是人，常用于sb. spend(s) some time / money on sth.和sb. spend(s) some time / money (in) doing sth.两种句型。
e.g. David spent 2,000 yuan on the new
machine.
My father spends an hour (in)
watching the news on TV every day.
3) pay多表示花费金钱，主语通常是人，常用于sb. pay(s) some money for sth.句型。
e.g. Tommy paid 20 yuan for his
breakfast yesterday.
4) cost多表示花费金钱，主语通常是物，常用于sth. cost(s) (sb.) some money.句型。
e.g. The new dress cost Linda 88 yuan.
I. 根据句意，从方框中选择恰当的单词填空，有的需要变换形式。
coal, fisherman, plastic, bottom, advantage, wood, cost, ugly, litter
1. Look! A boy is lying at the ______________ of the stairs.
2. The old man likes nature. He likes living in his small _______________ house on the mountain.
bottom
wooden / wood
coal, fisherman, plastic, bottom, advantage, wood, cost, ugly, litter
3. Most air pollution is caused by the burning of fuels (燃料) like ______________, gas and oil.
4. After your picnic, remember to pick up all your ______________.
5. The new mobile phone ______________ Sara 3,600 yuan last week.
6. Most of the ______________ in the village stayed at home today because of the bad weather.
coal
litter
cost
fishermen
Mr. Xi Jinping’s words:
Lucid waters and lush mountains are invaluable assets.
Let’s protect green waters and blue skies and build a better home!
Homework:
常规：阅拓
新课：1. 单词默写；2.编一组对话（对话需包含以下方面）。3. 背诵2d.