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(共52张PPT)
Unit 2 Saving the Earth
Topic 2 All these problems are very serious.
Section A
The storm is coming soon.
暴风雨
A terrible sandstorm comes.
沙尘暴
What is a sandstorm like
The wind is blowing strongly with lots of sand.
The strong wind carries the sand everywhere.
u[n]
so much sand
we can’t see anything clearly,
and the sand hurts our faces.
We need to wear hats and masks to protect ourselves.
While we are walking down the street,
How does a sandstorm come into being
3 Number the pictures.
( )
( )
( )
( )
( )
( )
4
1
5
3
6
2
Look at the picture, describe them using the words given.
many trees
At first, there were many trees.
Look at the pictures, describe them using the words given.
People cut down too many trees to make all sorts of things for themselves.
cut down trees
forests gone
So the forests have gone.
Look at the picture, describe them using the words given.
Look at the picture, describe them using the words given.
wash the earth away
The rain and rivers wash the earth away day by day.
change into desert
As a result, a lot of rich land has changed into desert.
Look at the picture, describe them using the words given.
sandstorms come into being
At last, sandstorms come into being.
Look at the picture, describe them using the words given.
At first, there were many trees.
People cut down too many trees to make all sorts of things for themselves.
So the forests have gone.
The rain and rivers wash the earth away day by day.
As a result, a lot of rich land has changed into desert.
At last, sandstorms come into being.
Can you retell it
The boy and girls are
talking about________.
different types of sandstorms
the reasons for sandstorms
sandstorms in different cities
1b Listen and choose the best answer.
Focus on the main idea of the conversation when you listen for the first time.
√
Read 1a, answer the questions.
What causes this kind of bad weather
People have cut down too many trees. A lot of rich land has changed into desert.
Task 2
Cutting down trees is harmful to human beings, animals and plants.
What should we do to prevent sandstorms
The Green Great Wall
nearly 300 million tons of sand
The Green Great Wall has worked well in preventing sandstorms.
Read 1a, answer the question.
What are trees’ functions
A lot of water can be saved by forests.
A.
B.
C.
Read 1a, answer the question.
What are trees’ functions
Trees can stop the wind from blowing the earth away.
A lot of water can be saved by forests.
Trees can also prevent the water from washing the earth away.
A.
B.
C.
沿街（往下）走着
乱砍滥伐森林
大量肥沃的土地
变成沙漠
防风固土
防止水土流失
危害人类
绿色长城
walk down the street
stop the wind from blowing the earth
away
prevent the water from washing the earth away
the Green Great Wall
be harmful to human beings
change into desert
a lot of rich land
cut down too many trees
Find the phrases.
(Kangkang, Maria and Jane are talking in a room. The
wind outside is blowing strongly.)
K: What bad weather! The wind is so strong! And the sand really hurt my face. While I was walking down the street just now, I couldn’t see anything.
blow strongly/ 刮大风
1a
雨/雪下得大
rain /snow heavily/hard
阳光灿烂
The sun shines brightly.
hard
The rain is _________ outside.
It’s raining _______________ outside.
We can’t go out because of the _______ snow.
Look! The sun is shining ___________.
It snowed _______________ last night.
heavy
heavily / hard
heavy
brightly
heavily / hard
hardly: adv. 几乎不（表否定）
他几乎不会说英语， 是吗？
He can hardly speak English, can he
Complete the sentences.
(Kangkang, Maria and Jane are talking in a room. The
wind outside is blowing strongly.)
K: What bad weather! The wind is so strong! And the sand really hurt my face. While I was walking down the street just now, I couldn’t see anything.
blow strongly/ 刮大风
1a
雨/雪下得大
rain /snow heavily/hard
阳光灿烂
The sun shines brightly.
I could see nothing.
hard
M: I’m sorry to hear that. What causes these sandstorms
K: People have cut down too many trees. As a result, a lot
of rich land has changed into desert.
M: That’s bad, but how can that affect the weather
1a
1. change into 变成…
change … into… = turn … into… 把…变成…
寒冷的天气把水都变成冰了。
The cold weather changed / turned water into ice.
= turn into
M: I’m sorry to hear that. But what causes these
sandstorms
K: People have cut down too many trees. As a result, a lot
of rich land has changed into desert.
M: That’s bad. How can that affect the weather
1a
2. affect v. 影响 affect sth. / sb.
effect n. 影响，结果
have an effect on sth. / sb.
太多的噪音会影响我们的听力。
Too much noise will affect our hearing.
Too much noise will have an effect on our hearing.
J: Trees can stop the wind from blowing the earth away.
K: And a lot of water can be saved by forests.
J: They can also stop the water from washing the earth
away.
stop…(from) doing sth.
blow…away
prevent…(from) doing sth.
wash…away
keep sb. / sth. from doing sth. （from不能省略）
让某人一直做某事 keep sb. / sth. doing sth.
大雨使得我们无法外出。
The heavy rain kept/prevented/stopped us from going out.
没有什么可以阻止他工作。
Nothing can stop/ prevent/ keep him from working.
3.
阻止某人做某事
4. 辨析earth；soil；ground；land
earth
（相对于天空、海洋而言的）地面，
地球，泥土
soil
土地、土壤，尤指生长植物的土地。
ground
地、地面, 主要指大地表面，泥地/沙地或水泥地
land
陆地，土地，田地，国土
1. The________is our only home.
2. I’ll fill the hole with ________．
3. The ____ is very thin in the forest．
4.We travelled by ______ until we reached the sea．
5. The________ is covered with leaves in the woods．
6. He studied how to improve ________ conditions．
earth ground soil land
earth
earth
soil
land
soil
ground
J: Trees can stop the wind from blowing the earth away.
K: And a lot of water can be saved by forests.
J: They can also prevent the water from washing the earth
away.
森林可以贮藏大量水分。
be saved 为被动语态结构。
save v. 贮存,保存, 挽救; 节约
挽救病人的生命是医生的职责。
It’s doctors’ duty to save patients’ lives.
我们必须节约每一滴水。
We must save every drop of water.
K: What bad weather! The wind is __________ And the
______ really _____my face. While __________________
________________ I couldn’t see __________.
M: I’m sorry to hear that. __________________________
K: People have _________ too many trees.___________, a
lot of ________has ___________ desert.
M: That’s bad. How can that __________________
J: Trees can ______________________________________.
K: And a lot of water _____________________.
J: They can also ____________________________________.
K:_________________________________________,
animals and plants. _________we have built “ the Great
Green Wall”, we still need to _____________ protect the
environment.
so strong!
sand
I was walking down
anything
cut down
changed into
affect the weather
stop the wind from blowing the earth away.
can be saved by forests
stop the water from washing the earth away
Cutting down trees is harmful to human beings
do something to
Consolidation
hurt
the street just now.
What causes these sandstorms
As a result
Although
rich land
2. Complete the sentences with the correct forms of the given phrases in the box.
as a result, change into, do something,
stop…from, blow…away
1.People have cut down such a large number of trees that
the land _____________________desert.
2.There are fewer trees left, so the wind always _______
the earth ________.
3.Air pollution has become a serious problem, so we must
________________ to reduce it.
4.we should try our best to _______ people ________
cutting down the trees.
5.In the future, human beings can protect the trees well.
_____________, animals will live a happy life in the forest.
has changed into
blows
away
do something
stop
from
As a result
5. a large number of + cn. 复数 大量的，许多的
the number of + cn.复数 谓语动词单数
大量的蜜蜂在飞舞。
A large number of bees are dancing.
游客的数量已经增长到200万。
The number of visitors has increased to 2million.
6. reduce v. 减少，减轻
减少浪费，减少废弃物
reduce waste
他们想通过减少成本来增加利润。
They want to increase profits by reducing the cost.
4 A. Listen to the passage and circle the phrases you hear.
become weaker
destroy the environment
disappear rapidly
on the earth
enough bamboo to eat
4 B. Listen again and fill in the blanks.
1. Now some kinds of animals are becoming
______ ______ _______.
2. Some animals are_____ ______ ____dying out
completely.
3. In the past, pandas lived a quiet life and had
_______ ____food.
4. Humans have _____ _____ ____________ the importance of protecting animals.
5. We should ______ ______ ____to protect them.
do our best
in danger of
plenty of
come to understand
fewer and fewer
be in danger (of…) 处于(…) 危险中
许多野生动物处于灭绝的危险中。
Many wild animals are in danger of dying out.
2. die out 灭绝
(die—died—died—dying)
那种鱼几百万年前就灭绝了。
That kind of fish died out millions of years ago.
3. plenty of + cn. / un. 大量的
去年雨水充足。
There was plenty of rain last year.
从上个月起，我已经阅读了大量的书。
I’ve read plenty of books since last month.
adj: dead n: death
In the past, people killed animals for their meat and skin. Now some kinds of animals are becoming fewer and fewer. And some animals are in danger of dying out completely. Some people destroy the environment where animals live. For example, in the past, pandas lived a quiet life and had plenty of food. However, the bamboo forests are now disappearing rapidly because humans destroyed them. Now pandas can’t find enough bamboo to eat. Humans come to understand that animals are important to us. They are our friends and share this planet with us. If we do our best to protect them, the world will be a better place.
1. What is a sandstorm like
2. How does it come into being
3. What should we do or not do to prevent it and what’s your reason
You can begin like this:
Sandstorms are terrible. When they come,
________________________________________
Project
Sandstorms are terrible. When they come, the wind is blowing strongly with much sand. When we walk out, we can see nothing clearly and our face hurt. The sand makes all the things in a mess. It is difficult for us to live a normal life.
How do the sandstorms come into being At first, there were many trees on the earth. Then, people cut down too many trees to make all sorts of things for themselves. So the forests have gone. The rain and rivers washes the earth away day by day. As a result, a lot of rich land has changed into desert and the sandstorms come into being.
The problem is serious. It’s time for us to do something useful right now. We should stop people from cutting down too many trees. And planting trees is also a good way.
As we know, a lot of water can be saved by forests. Trees can stop the wind from blowing the earth away and they can also prevent the water from washing the earth away.
Let’s try our best to do everything we can to fight against sandstorms!
1.—Would you like to have _____
—No, thank you. I’ve had enough.
A. anything more B. something more
C. more anything D. more something
2.The Green Great Wall can stop the wind_____ blowing the earth away.
A. to B. from
C. of D. with
3.This washing machine is very difficult to use. _____ can learn to use it in a very short time.
A. Somebody B. Anyone
C. Nobody D. Everyone
Practice
4.—Hi, Bob! I can’t find my story book. Have you seen it
—Sorry, I haven’t. Why not ask Jim Perhaps he’s seen it______.
A. anywhere B. everywhere
C. nowhere D. somewhere
5.None of us _____ running, but we all like swimming.
A. Likes B. like
C. liking D. would like to
6. ____Liang Li is very busy, she always helps others.
A. But B. And
C. Although D. Because
Practice
Lily, would you like ___________ to drink
Cindy is very busy now. She needs _______ to help her.
Is there _________ wrong with your computer
Jim looked for his pencil-box ____________ , but he didn’t find it.
I stayed at home last week. I didn’t go __________.
Use someone, something, anything, somewhere, anywhere to fill in the blanks.
something
someone
anything
somewhere
anywhere
Exercises
Saving Water
We should save every drop of water.
Protecting and Saving Water
Water is very important to human beings, but not everybody knows how to protect and save it. Here are some ways:
1. Pass laws against water pollution.
2. Stop factories pouring waste water into rivers.
3. Remember to turn the tap off when you leave.
4. Collect and reuse waste water.
...
Group work
Read and discuss different ways of protecting and saving water.
Practice
不是每个人都知道如何保护和节约水资源。
通过禁止水污染的法律。
禁止工厂想河里排放污水。
当你离开时，记得关掉水龙头。
收集并重新利用废水。
Not everybody knows how to protect an save water.
Pass laws against water pollution.
Stop factories pouring waste water into the rivers.
Remember to turn off the tap off when you leave.
Collect and reuse waste water.
Translation!
Trees are very useful to us. They can help us p_______ the wind from blowing the earth away and stop the s____ from moving towards the rich land. Trees also s____ water from running away. They can keep a great d___ of water. So we must stop people from c______ down too
many trees. Otherwise a lot of rich land will change into d_____, l_______ only sand. We must get rid of (摆脱) this kind of bad b_______.
根据句意及首字母提示完成句子。
revent
and
ave
eal
utting
esert
eaving
ehavior
Practice

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