仁爱版九年级英语上册 Unit 2 Topic 2 Section A 课件(共23张PPT)

课件23张PPT。Unit 2 Saving the EarthTopic2 All these problems are very serious.Section Amany trees Human being cut downforests gonewash the earth away冲走change into desert转换成，变成沙漠e.g. A lot of rich land has changed into desert because people have cut down too many trees. sandstormscome into being n. 沙尘暴listen and answerThe 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.√Read 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 .
conj. 虽然，尽管，即使Focal points
1.As a result, a lot of rich land has changed into desert.
2.Trees can stop the wind from blowing the earth away.
Stop sb/sth from doing sth
blow…..away
3.Cutting down trees is harmful to human being.
4.不定代词用法
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 1.I have ____ to tell you.
A. important something
B. something importantB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. areA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 3 Do you know how sandstorms come into being? Number
the pictures and talk about the sandstorm in groups.( )( )( )( )( )( )415362wash the earth awaymany treeschange into desertforests gonesandstorms come
into beingcut down treesK: 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 intoblows awaydo somethingstopfromAs a resultLily, 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 anythingsomewhereanywhere ExercisesWe 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.SummaryAssignmentRead 1a.
Memorize the useful expressions and key sentences which we learn today.
Finish Section A in your workbook.
Preview Section B.Boys and girls, let’s love our earth and travel together!Thank you!