1、Unit 2 Saving the Earth Topic3 What can we do at home to protect the environment?,Section A,What kinds of pollution do you know?,Air pollution is harmful to our health.,Many chemical factories cause air pollution.,Many chemical factories cause air pollution and air pollution is harmful to our health
2、.,The girl is picking the garbage up.,The boy is throwing the garbage about.,The girl is picking the garbage up, but/while the boy is throwing the garbage about.,We must plant more trees.,There will be more deserts.,We must plant more trees, or there will be more deserts.,连词 or, and, but 和 while的用法,
3、or 否则的话and 并且,而且but 但是,表示转折while 而, 然而 强调对比,并 列 句,并列句是由连词把两个或两个以上的简单句连成的一个新句子，即：简单句+并列连词+简单句。,(P44)2 Combine the sentences with or, and, but or while, making some changes if necessary.,1. Noise is a kind of pollution. Its harmful to our hearing. Noise is a kind of pollution and its harmful to our he
4、aring. 2. Work hard. You will fail the exam. Work hard, or you will fail the exam. 3. Nodding the head means agreement. Shaking the head means disagreement. Nodding the head means agreement while/but shaking the head means disagreement. 4. Hurry up. You will miss the bus. Hurry up, or you will miss
5、the bus. 5. He has failed several times . He never gives up. He has failed several times, but he never gives up.,放弃,Our school is beautiful.,Somebody pollutes it sometimes.,Our school is beautiful, but somebody pollutes it sometimes.,Listen to 1a and answer the questions.(P43),What is Jane working f
6、or ?Jane is working for an organization that protects the environment.(2) Whats her main job?Her main job is to help spread the message about protecting the environment.,1b Read 1a loudly and complete the table.,organization,protect the environment,spread the message,reduce the waste,waste paper,Lan
7、guage points,1.work for +V-ing/n. 为工作,2. spread the message 传播信息,3. both sides of 的两面,4. encourage sb to do sth 鼓励某人做某事,Read 1a in pairs and then ask some pairs to act it out.,1c Read 1a and complete the sentences. （P43）,The three Rs -_, _ and _ - are important. At home, we can, for example, use bot
8、h _ of paper and reuse _ bags. At school, students are encouraged to _ waste paper and _ because recycling can protect the _ and _ money. Then we _ them _ they can be recycled.,reduce,reuse,recycle,sides,plastic,collect,soft drink cans,environment,save,sort,so that,3a Read the table and write the co
9、rrect letter under each picture. Then sort the garbage based on your own knowledge. （P44）,paper cups,glass bottles,cans,plastic bags,newspapers,Recycled,Reused,Reduced,Discuss and sort them,3a Read the table and write the correct letter under each picture. Then sort the garbage based on your own kno
10、wledge.,3b Listen to the conversation and check your answers in 3a.,Wow! Weve got so much garbage! Soft drink cans, lunch boxes, plastic bottles, batteries, waste paper, paper bags and cups,4 Suppose you will have a Clean-up Day. Work in groups and find out the garbage. Then sort them based on 3a an
11、d talk about them.,A: I think lunch boxes should be reused. B: What about waste paper ? A: I think,We learn: : 1.Some phrases：give up, work for, encourage sb to do sth. 2.并例句：,Summary,or 否则的话 and 并且,而且but 但是,表示转折while 而, 然而 强调对比,Read 1a. Memorize the useful expressions and key sentences which we learn today. Finish Section A in your workbook. Preview Section B.,Homework,Thank you !,
