Topic 2 All these problems are very serious.Section A课件（17张PPT）

课件17张PPT。仁爱英语九年级上册
Unit 2 Saving the Earth
Topic 2 All these problems are very serious.
Section A沙
沙暴
转换成，变成
沙漠；舍弃，遗弃
人
虽然，尽管，即使
减少；减轻sand
sandstorm
change into
desert
human being
although
reduce
Check New words They do harm to our health in many ways .air pollutionlight pollutionlitterwater pollutionsoil pollutionnoise pollutionReview sandstormsDo you know how sandstorms come into being?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.B1. The weather is fine and the wind is blowing
lightly. ( )
2. A lot of rich land has changed into desert
because people have cut down too many trees.
( )
3. A lot of water can be saved by forests. ( )
4. Cutting down trees is harmful to only animals
and plants. ( ) Listen again and Mark T(True ) or F(False).FbadstronglyTTFhuman
beingsRead 1a after the tape.Read 1a together.1c Read 1a and complete trees’ functions.
B. A lot of water can be saved by forests. Trees’ functions Trees can stop the wind from blowing the earth away.Trees can stop the water from washing the earth away. A. C.1. Trees can stop the wind from blowing the earth away.
树木可以阻止风吹走土壤。 （blow away 吹走）
2. They can also stop the water from washing the
earth away.
它们还能够阻止水冲走土壤。（wash away 冲走）
stop/prevent/keep sb. from doing sth. 阻止某人做某事
My mother always stops me from playing
computer games.
3. And a lot of water can be saved by forests.
森林可以贮存大量的水。/ 大量的水可以被森林贮存。
can be saved “能被贮存”，含有情态动词的被动语态
save : 贮存/保留/保存; 节约；挽救
节约水 save water
救救地球 save the earth
Key sentencesRead 1a alone.请在Section A中找出含有不定代词的句子。1....,I couldn’t see anything.
2...., we still need to do something to
protect the environment.1.somebody, someone, something, somewhere

2.anybody, anyone, anything, anywhere

3.none, nobody, nothing, nowhere

4.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.as a result, change into, do something,
stop…from, blow…away has changed intoblows awaydo somethingstopfromAs a result2 Complete the sentences with the correct forms of
the given phrases in the box.大量的ExercisesThe policemen tried to keep traffic
accidents _____ happening.
A. from B. in C. to D. with
2. _____he was very tired,_____ he went on working.
A. Although, but B. /, still
C. Although , / D. Because, so
3. _____ bad weather! We have to stay at home.
A. What a B. How C. How a D. What
4. I haven’t learnt ____ about the film, because they say ____ about it.
A. anything; nothing B. anything; something
C. something; anything D. something; nothing
5. – Doctor Li, is there anything wrong with my eyes?
– No. ____ is OK.
A. Something B.Everything
C. Nothing D. SomeoneRead the passage and fill in the blanks with
the correct words.
The earth is our home. But some of us have ________ it, and it is crying for ______. Why? Because we ______ down too many trees, so lots of rich land has ____________ into desert. Factories ________ waste water into rivers. pollution has caused many serious problems and it is ___________ to our health.
What should we do to save it?
We should ____________ more trees.
We can ride bikes or walk to school to _________ air pollution.
I think we should try to be greener people to protect our earth. ...
After all, we have only one earth. We should do ____________ we can to protect it, or we’ll _______ our home. pollutedhelpcutchangedpourplantreduceeverythingloseharmfulExercises13257468910Summary
1. sand , sandstorm , change into,
desert, human being, although, reduce
2. blow away 吹走
wash away 冲走
stop /prevent /keep sb. from doing sth.
阻止某人做某事
as a result 结果
a large number of 大量的
3. Indefinite Pronoun 不定代词
...,I couldn’t see anything.
...,we still need to do something to protect
the environment.
4. Learn much information about sandstorm. Homework
Remember the new words ,the useful
expressions and key sentences in
Section A.
2. Write a short passage about how
sandstorms come into being. (Part 3)
3. Finish Section A in your workbook. Thank you
for listening !