Unit 2 Saving the Earth Topic 2 All these problems are very serious.课件 (共17张PPT)

(共17张PPT)
仁爱版·九年级第一学期
Topic2 All these problems are very serious.
Unit 2 Saving the Earth
不定代词和不定副词有哪些？
somebody, someone, something, somewhere
anybody, anyone, anything, anywhere
none, nobody, nothing, nowhere
everybody, everyone, everything, everywhere
不定代词和不定副词有哪些？
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
( )1.This machine is very easy to use. _____ can learn to use it in a very short time.
A.Somebody B.Anybody C.Everyone
( )2.Mum came in with a serious look,and I knew____was wrong.
A.anything B.something C.nothing
( )3._____ everybody likes watching TV in my family. My parents like doing outdoor activities.
A.No B.Not C.None
( )4.—Is _____ ready for the trip
—No, we haven’t got a camera.
A.nothing B.something C.anything
( )5.Everything_______ changed.
A.has B.have C.to have
C
B
B
C
A
What will our world be like without trees
sandstorm
desert
human beings
Number the pictures and then talk about them in groups.
wash the earth away
many trees
change into desert
forests gone
sandstorms come into being
cut down trees
Number the pictures and then talk about them in groups.
( )
( )
( )
( )
( )
( )
Do you know how sandstorms come into being
4 1 5
3 6 2
Listen to 1a, answer the questions.
What are they talking about
What causes this kind of bad weather
They are talking about sandstorms.
People have cut down too many trees. A lot of rich
land has changed into desert.
1.The wind is blowing strongly …
2.cutting down trees is harmful to human beings.
3.change into
4.A lot of water can be saved by forests.
5. stop / prevent sb.(from) doing sth.
6. wash away
7. Although …,we still need to work hard to protect the environment.
wind风刮得猛用 strongly
动名词（组）作主语,谓语动词用单三. cut down砍倒
= turn into转变成
水被森林贮存.
= keep sb.from doing sth阻止某人做某事
冲走
although = though不能与but连用; “尽管，虽然”
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.
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.
...
turn off关掉（水龙头、煤气、电器）
remember to do sth.记得要做某事
remember doing sth.记得曾做了某事
Read and discuss different ways of protecting and saving water.
Useful expressions
The wind is blowing strongly with lots of sand.
People have cut down too many trees.
A lot of rich land has changed into desert.
And a lot of water can be saved by forests.
They can also prevent the water from washing
the earth away.
Stop factories from pouring waste water into rivers.
完成下列句子
1.许多肥沃的土地已经变成了沙漠，留下的是遍地黄沙。
A lot of rich land has ___________desert,leaving only sand.
2.人们砍了很多树。People have_________many trees.
3.这位警察阻止了这个男孩在街上踢足球。
This policeman _____the boy ______ _______ _________in the street.
changed into
cut down
stops from playing football
单项选择题
1. The cleaner must keep the street____.
A .from getting dirty B.getting dirty C.to get dirty
2.We must plant more trees after we__every year.
A.cut off them B.cut them down C.cut down them
3.The flood couldn’t stop the soilder__towards the most dangerous place.
A.from moving B.for moving C.to move
4.There was a rainstorm yesterday. The flood __the old brigde.
A.washed away B.went away C.put away
5.LiHong always helps others__she is very busy.
A.but B.because C.although
A
B
A
A
C
Homework
1.Write a short passage with the title “Protecting and Saving Water”.写一篇题为“保护和节约水资源”的短文。
2. 预习Section C.
THANK YOU