Topic 3 What can we do to protect the environment? Section D 教学课件 24张PPT

课件24张PPT。Unit 2 Topic 3Section D 科普2011课标版九年级英语上册保护森林，熊熊有责 What can forests do for us?Forests are the lungs of the earth. ‘采挖致3万多亩森林遭破坏采挖致3万多亩森林遭破坏It’s everyone’s duty to protect forests
保护森林，人人有责Unit 2 Saving the EarthTopic 3 What can we do at home to protect the environment? Section D 科普2011课标版九年级英语上册Teaching aims Knowledge aims
1. Learn and master some new words and useful expressions;
2. Talk about the importance of forests;
3. Review Compound Sentence(并列句），pay attention to and、or、but and while.
Moral aims
Learn more knowledge about the environmental protection and try to be a greener person.
1. Listen to 1a , underline the key points and the difficulties.
2. Try to answer the following questions.Work alone
1.How do you understand “Forests are the lungs of the earth”?
2.What difficulties do tree planters face when they plant trees ?
3.Why do they plant different kinds of trees ?
p49-reading.mp3How do you understand “Forests are the lungs of the earth”?Forests can remove carbon dioxide from the
air and make oxygen. What difficulties do tree planters face when they plant trees ?
(1)The weather may be very hot and dry or it may be very cold and wet.
(2)There are often many insects that bite these planters on their legs, arms, and faces while they work.
(3)They carry heavy bags of small trees, and working in the mountains can be dangerous. Why do they plant different kinds of trees ?
They plant different kinds of trees so that
birds and animals can live in the forests.
1. Read 1a again and find out the topic sentence of each paragraph
2. Discuss the usage of the key points and the difficulties.Group workTopic SentenceParagraph 1:
___________________________________
Paragraph 2:
___________________________________
___________________________________
Paragraph 3:
___________________________________
Forests are the lungs of the earthThese young men and women face many difficulties when they plant new trees.Tree planters are changing the world.Solve the difficulties together
Finish the following exercise.Class workLanguage points bite sb on the +身体部位
There are many insects that ___ them___ their legs while they work.
even though = even if, 即使，尽管，虽然
_________tree planting is very difficult, they love their work.
so that =in order that，为的是，目的是
They plant different types of trees ________birds and animals can live in the forests.
bite on Even thoughso thatGrammarandwhile orbut并列句（ Compound Sentence） 并列句是由并列连词把两个或两个以上的简单句连在一起构成的句子。连词前可用逗号，也可不用逗号。
表并列关系常用连词：and（并且）
表转折关系常用连词：but（但是）、while（然而）
表选择关系常用连词：or（否则）

( ) 1. Cross the road carefully, ________ you’ll keep yourself safe .
A. so B. or C. but D. and
( ) 2. Hurry up, ________ you’ll be late for the concert .
A. or B. so C. but D. and
（祈使句，or / and +句子）
中考链接DAWriting exercise 森林对我们非常重要，没有森林地球就无法呼吸。但在一些地方，大片森林被砍到，我们必须做一些事情来保护森林资源。请根据以下提示完成作文：
1、节约用纸，减少使用一次性筷子（throw away chopsticks)和纸杯(paper cups);
2、多种树；
3、禁止砍伐树木。
You can begin like this:
Forests are very important to human beings. …Let’s do something to protect and save them.
First, ...... Second,...... Third,......
All in all, It’s our duty to……

Memorize the useful expressions and key sentences that we learnt today.
Finish Section D in the workbook.
Finish the composition and hand it in.
Thank you! What can forests do for us?