Unit 2 saving the earth. Topic 2 Section A 课件2022-2023学年仁爱版英语九年级上册(共21张PPT)

(共21张PPT)
All these problems are very serious.
Section A
Unit2 Topic2
Speak out the names of the pollution.
air pollution
light pollution
litter
water pollution
soil pollution
noise pollution
Pollution has caused too many problems.
What kind of problem is it
Sandstorm
rainstorm
snowstorm
a kind of storm
caused by sand
Describe the sandstorms
How do the sandstorms come into being
(形成)
6
4
1
3
wash the earth away
many trees
forests gone
sandstorms come into being
2
5
change into desert
cut down trees
Number the pictures and then try to make sentences.
1.There were many trees in the past.
2.Later, people have cut down many trees.
3.Little by little, forests have gone.
4.The wind has washed the earth away
5.The rich land has changed into desert.
6.Finally,sandstorms come into being.
many trees
cut down
forests gone
wash the earth away
冲走
change into desert
sandstorm
come into being
Retell Competition
Trees can stop the wind from blowing the earth away.
Trees can also stop the water from washing the earth away.
森林可以防风固土。
森林可以贮存大量的水分。
森林可以防止水土流失。
List the trees’ functions
1. Cutting down too many trees
causes these sandstorms.
2. Trees can’t affect the weather.
3. Trees can stop the wind from blowing
the earth away.
4. Forests save a lot of water.
5.
Great Wall” , we still need to protect
the environment.
Listen to the tape and mark True (T) or False (F).
Because
haven’t
we
built “ the Green
can’t
1. Cutting down too many trees
causes these sandstorms.
2. Trees affect the weather.
3. Trees can stop the wind from blowing
the earth away.
4. Forests save a lot of water.
5.
Great Wall” , we still need to protect
the environment.
T
F
T
F
F
Listen to the tape and mark True (T) or False (F).
Because
haven’t
have
Although
we
built “ the Green
can
can’t
can’t
can
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.p35-1a.mp3
Focus on the main idea of the conversation when you listen for the first time.
√
Read aloud and pick up the useful expressions.
Read & Recite
多么糟糕的天气啊！
沿着…走
砍伐，砍倒
结果（是）…
变成…
阻止…做…
把…吹走
把…冲走
人类
需要做…
做点事
Language points-1a
1.What bad weather!
2.walk down
3.cut down
4.as a result
5.change…. into
6.stop…from
7.blow…away
8.wash…away
9.human being
10.need to do sth.
11.do something
和“事物”有关的不定代词
something anything nothing everything
肯定句
否定句和疑问句
表否定含义
用于各种句式
the indefinite pronoun and adverb
Answer-3
1.I have ____ to tell you.
A. important something B. something important
2.Everything ___ ready for the match.
A. is B. are
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。
不定代词作主语时，谓语动词要用第三人称单数。
(B)
(A)
考点直通车-3
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
Thank you!