Unit2 Topic1 Pollution has caused too many problems.SectionA 课件（18张，无素材）

Unit 2 Saving the Earth
Topic2 All these problems are very serious.
Section A
There are many kinds of pollution around us,
air pollution
light pollution
litter
water pollution
soil pollution
noise pollution
We should do something to protect our environment
desert 沙漠
sandstorms 沙尘暴
sand 沙
The boy and girls are
talking about —————.
different types of sandstorms
the reasons for sandstorms
sandstorms in different cities
1b Listen to 1a and choose the best answer.
Focus on the main idea of the conversation when you listen for the first time.
√
Listen and answer the questions
1.What’s the weather like today ?
It’s bad. The wind is so strong . And the sand really
hurts face.
2.What causes these sandstorms ?
People have cut down too many trees.
As a result, a lot of rich land has changed into desert.
3.Do we still need to do something to protect the
environment ?
Yes, we do. Although we have built “The Green Great
Wall”, we still need to do something to protect the
environment .
Kangkang: 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.
Maria: I’m sorry to hear that. What causes these sandstorms?
Jane: people have cut down too many trees. As a result, a lot of rich land has changed into desert.
Maria: That’s bad. How can that affect the weather?
Jane: Trees can stop the wind from blowing the earth away.
Kangkang: And a lot of water can be saved by forests.
Jane: They can also stop the water from washing the earth away.
Kangkang: Cutting down trees is harmful to human beings, animals and plants. Although we have built “The Green Great Wall” , we still need to do something to protect the environment.
somebody, someone, something, somewhere

anybody, anyone, anything, anywhere

none, nobody, nothing, nowhere

everybody, everyone, everything, everywhere
一般情况下用于肯定句
一般情况下用于否定句和疑问句
表否定含义
可用于各种句式
the indefinite pronoun and adverb (不定代词和不定副词）
1.I have ____ to tell you.
A. important something
B. something important
B
形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后
Do you know?
2.Everybody ___ ready for the match.
A. is B. are
A
不定代词作主语时，谓语动词要用单数。
1c Read 1a and complete trees’ functions.
Trees can stop the wind from blowing the earth away.
A lot of water can be saved by forests.
They can also stop the water from washing the earth away.
Tree’s functions （功能）
K: wind; sand; anything
M: sandstorms
J: cut down; as a result; change into
M: affect
J: stop…from…; blow… away
K: can be saved
J: wash … away
K: is harmful to; although; do something
Act out the dialog in pairs
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
3 Do you know how sandstorms come into being? Number
the pictures and talk about the sandstorm in groups.
( )
( )
( )
( )
( )
( )
4
1
5
3
6
2
wash the earth away
many trees
change into desert
forests gone
sandstorms come
into being
cut down trees
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
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
We learn: 1.Some words: sand, although
2.Some phrases: change into, human being
3.Some sentences:
(1)As a result, a lot of rich land has changed
into desert.
(2)Trees can stop the wind from blowing the
earth away.
We can: 1. Use the indefinite pronoun and adverb.
2.Talk about the sandstorm and its harm.
Summary
Read 1a.
Memorize the useful expressions and key sentences which we learn today.
Finish Section A in your workbook.
Preview Section B.
Thank you!