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(共39张PPT)
Unit 2 Saving the Earth
Topic 1 Pollution has caused too many problems.
Section A
学习目标
一、掌握以下单词：bee, butterfly, mess, shame, several, pour, stream 等。
二、掌握以下短语，句子: What a mess! What a shame, pour…into…
三、对比使用一般过去时与现在完成时，了解两种时态的区别。
四、了解污染，要学会保护环境。
How do you spend your weekends
watch TV
play games
sleep all day
Kangkang, Jane, Maria and Michael are planning for Sunday.
have a picnic
Where
a hill
a hill
a river
a hill
a river
some flowers
a bee
a butterfly
It’s such a beautiful place.
What can you see in the picture
West Hill
What can you see in the picture
The water is so dirty.
several chemical factories
pouring waste water into the stream
____ beautiful ____ butterflies ____ grass
____ factory ____ bees ____ fresh
____ clean ____waste water
Listen to 1a and mark the words with P (Past) or N (Now).
1b
P
N
N
P
N
N
N
N
(Kangkang, Jane,Maria and Michael are planning a picnic for Sunday.)
Jane and Maria: Where shall we go
Kangkang: What about the West Hill
Jane: I went there two years ago. It was a mess. There were several chemical
factories pouring waste water into the stream.
Maria: What a shame!
Kangkang: I have heard it has become a beautiful place. There are lots of
flowers and grass.
Michael: Sounds great! Let's go there.
Read the first part of 1a and answer the questions.
1. Was the West Hill beautiful 2 years ago
2. Will they have a picnic there
West Hill
now
Listen to the second part of 1a and fill in the blanks.
It is a __________ place.
The air is _____ and the water is_______ ,
and you can see _________________ dancing.
beautiful
fresh
clean
bees and butterflies
How is the West Hill now？
Two years ago Now
1. It was a ________. 2. There were several ________________ pouring ____________ into the stream. 1. The air is ________and
the water is ______.
2. You can see __________________ dancing.
3. _____________has changed.
Read 1a and complete the sentences in the table.
1c
mess
fresh
clean
bees and butterflies
chemical factories
waste water
Everything
(Kangkang, Jane,Maria and Michael are planning a picnic for Sunday.)
Jane and Maria: Where shall we go
Kangkang: What about the West Hill
Jane: I went there two years ago. It was a mess. There were several chemical factories pouring waste water into the stream.
Maria: What a shame!
Kangkang: I have heard it has become a beautiful place.
There are lots of flowers and grass.
Michael: Sounds great! Let's go there.
Read and understand.
(On Sunday, they come to the West Hill.)
Maria: Oh, what a beautiful place! The air is fresh and the water is clean, and
you can see bees and butterflies dancing.
Kangkang: Everything has changed.
Michael: Do you want to have a picnic here
Jane: Of course.
Read and understand.
Two years ago the West Hill was a _______. The water was __________ , because there were__________ chemical factory __________ waste water ______ the stream. But now everything ______ ________. The air is _______ and the water is__________. We can see bees and butterflies _________. There are __________ flowers and grass .
Retell.
mess
so dirty
several
pouring
into
has changed
fresh
clean
dancing
lots of
Watch and understand.
Read and act 1a out.
Key points
(Kangkang, Jane,Maria and Michael are planning a picnic for Sunday.)
Jane and Maria: Where shall we go
Kangkang: What about the West Hill
Jane: I went there two years ago. It was a mess. There were several chemical factories pouring waste water into the stream.
Maria: What a shame!
Kangkang: I have heard it has become a beautiful place.
There are lots of flowers and grass.
Michael: Sounds great! Let's go there.
there be sb doing sth
某地有sb正在做...
There is a boy ___________basketball
on the playground.
playing
There is a baby ___________at home.
sleeping
There are some students dancing over there.
pour ... into 把 … 倒入
把酒倒入酒杯里。
________________________________
Pour the red wine into the glass.
Key points
(Kangkang, Jane,Maria and Michael are planning a picnic for Sunday.)
Jane and Maria: Where shall we go
Kangkang: What about the West Hill
Jane: I went there two years ago. It was a mess. There were several chemical factories pouring waste water into the stream.
Maria: What a shame!
Kangkang: I have heard it has become a beautiful place.
There are lots of flowers and grass.
Michael: Sounds great! Let's go there.
waste： n. 浪费 v. 浪费 adj. 废弃的
waste paper
废纸
waste water
废水
adj. 废弃的
Don’t waste water.
v. 浪费
Key points
(Kangkang, Jane,Maria and Michael are planning a picnic for Sunday.)
Jane and Maria: Where shall we go
Kangkang: What about the West Hill
Jane: I went there two years ago. It was a mess. There were several chemical factories pouring waste water into the stream.
Maria: What a shame!
Kangkang: I have heard it has become a beautiful place.
There are lots of flowers and grass.
Michael: Sounds great! Let's go there.
真遗憾!多可惜!
(On Sunday, they come to the West Hill.)
Maria: Oh, what a beautiful place! The air is fresh and the water is clean, and
you can see bees and butterflies dancing.
Kangkang: Everything has changed.
Michael: Do you want to have a picnic here
Jane: Of course.
Key points
see
see sb do sth
see sb doing sth
看到sb做了sth (经常性、全过程)
看到sb正在做sth
eg : I often see the birds_________( sing ) in the tree near my home.
Yesterday I saw his car________( hit ) a boy when I walked along the road.
I heard him________( play )the piano when I got home yesterday.
I often heard the baby ________( cry ) at home.
sing
hitting
playing
cry
2
Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
villagers / destroy
village / flowers and grass
Example:
A: The villagers destroyed the flowers and grass when I visited the village last year.
B: But now the flowers and grass have
come back.
A: What has happened here
B: The villagers have learned that they were wrong. And they have done a lot to make the village a better place.
2
Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
farmers / cut down
hill / trees
A: The farmers ...
when I ...
B: But now ... have ...
A: What has happened here
B: The farmers have ...
2
Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
farmers / cut down
hill / trees
A: The farmers cut down many trees
when I visited the hill last time.
B: But now the trees have come back.
A: What has happened here
B: The farmers have learned that they were wrong. And they have done a lot to make the hill a better place.
2
Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
factory / pollute
city/ lake / fish
A: The factory ...
when I ... last year.
B: But now ... come back.
A: What has happened here
B: The city has ...
2
Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
factory / pollute
city/ lake / fish
A: The factory polluted the water
when I visited the lake last year.
B: But now the fish have come back.
A: What has happened here
B: The city has learned that he was wrong. And he has done a lot to make the lake a better place.
A. Listen to the sentences and number the pictures.
5
3
2
1
4
6
3
Listen again and complete the sentences.
1. People ______ ______ ______ trees. Now I have enough leaves to eat.
2. I live in trees. People have stopped ______ ______ trees.
So I have more family members.
3. Leaves and grass ____________ many years ago.
But now they have come back. I can have enough food.
4. I have found more bamboo on the mountain.
I don’t have to ______ ______ ______ any more.
5. In recent years, I ______ ______ ______ ______ to make the sea clean again.
6. I couldn’t live in the river because it ______ ______ ______ for me to live in.
Now it has become clean again, so I am safe.
have planted more
cutting down
disappeared
worry about food
have seen people’s effort
was too dirty
3
Work in groups and talk about pollution in a place you are familiar with. The following sentences may help you.
4
Air pollution 空气污染
Noise pollution 噪音污染
Water pollution 水污染
A: There ...
when I ... last year.
B: But now ... have gone.
A: What has happened here
B: The ... have ...
Exercises
( ) 1. Look! There are some boys ________ on the playground.
A. play football B. are playing football
C. playing football D. plays football
( ) 2. — I’m sorry I can’t go shopping with you. I am ill.
— ________
A. What a mess! B. What a shame!
C. What a pity! D. B and C
( ) 3. — Don’t ________ water. We must save every drop of it.
— Sorry, I won’t do it again.
A. waste B. throw C. play D. leave
( ) 4. The new factory is waster water into it.
A. throwing B. wounding C. cleaning D. pouring
Exercises
1. When I entered the room, I saw Maria ________ (read) a Chinese book.
2. What a shame! The flowers and trees in the park ____________ (go).
3. Everything ________________ (change) in the past few years.
4. Pandas don’t have enough bamboos _____ (eat)now because of the pollution.
5. — Where have they been
— They _____________ (be) to the Great Wall.
They _______ (have) a good time there the day before yesterday.
reading
have gone
has changed
to eat
have been
had
Exercises
1.大风过后，所有的花消失了。
After the strong wind, all the flowers ____ ____.
2.公园里有个女孩正在放风筝。
_____ ____a girl ____ ____ ______in the park.
3.请不要把垃圾倒入河里。
Don’t _____ litter ______the rivers.
4.看，一个男孩正在砍树。让我们去阻止他。
Look! A boy is ______ _______ the tree. Let’s go and stop it.
have gone
There is flying a kite
pour into
cutting down
Summary
We learn
1. New words : bee, butterfly, mess, shame, several, pour, waste,
villager, destroy, pollute, goodness
2. New phrases: cut down, see sb. doing sth. , pour…into…
3. New sentences:
There be…doing…
We can
1. Express exclamation:
What a mess! What a shame! Oh, my goodness!
2. Know the differences between Simple Past and Present perfect.
It was a beautiful place.
Everything has changed.

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