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1、 Unit 2 Saving the Earth Topic3 What can we do at home to protect the environment?Section D三、Grammer:Compound Sentence 1.In many countries,such as New Zealand,Canada,and Brazil,forests were cut down to provide wood to build houses.2.Many young volunteers around the world are working in their holiday
2、s to plant new trees to replace them.3.Even though tree planting is very difficult,they love their work.4.They believe that in 50 years their little trees will become beautiful forests.Learning aims一、New words:remove,replace,dry,insect,bite二、Important phrases and sentencesRevision in class 1.使用某物做某事
3、 2.全世界 3.寻找 4.不但.而且 5.太.而不能做某事 6.花费某人多长时间做某事 7.是第一个做某事的.8.某事需要被做 9.要求某人做某事 10.达到多少数量 11.用完，耗尽 12.之一 13.达到某个速度 14.以某个速度1.use sth.to do sth.=use sth.for(doing)sth.2.all over the world 3.look for4.not only.but also.5.too+adj.+to do sth.6.It+takes+(sb.)+time +to do sth.7.be the first/second/-+n.+to do s
4、th.8.sth.+require+(doing)sth.9.require sb.to do sth.=ask sb.to do sth.10.up to-11.run out /run out of12.one of-13.reach a speed of+具体速度14.at a speed of+具体速度Compound Sentence Recycling can protect the environment,_ it can save money,too.Some things we have done are good for the earth _ some are bad.W
5、e should do everything to protect it,_ well be punished and lose our home.people produce power from coal,_ it is very dirty and causes acid rain.andwhile orbutGrammar连词连词 or,and,but,while 和和 so 的用法的用法并并 列列 句句表示并列关系，动作的先后关系，用表转折关系，用 表选择，用表因果关系，用 祈使句，and+简单句 祈使句，or+简单句 and（和，并且）but（但是）,while（然而）but 但是
6、,表转折 while 然而,表转折，有对比的意思or 或者.否则,有警告意思so 所以，因此()1.Help others whenever you can _ youll make the world a nicer place to live in.A.or B.and C.but D.while()2.Cross the road carefully,_ youll keep yourself safe.A.so B.or C.but D.and()3.Hurry up,_ youll be late for the concert.A.or B.so C.but D.and()5.I
7、always enjoy visiting London,_ I wouldnt like to live there.A.because B.so C.but D.and()6.There are many sports lovers in his office.Some love climbing,_ others enjoy swimming.A.Or B.for C.while D.soB BD DA AC CC CFunctionsWould you like to be a _ person?First,you ought to _ the electricity when you
8、 leave a room._ said than done.Action speak _ than words.The train can _ a top speed of 431 km per hour.greenershut off EasierlouderreachReading PracticeListen to textbooks and decide which of the following sentences is true“T”or false“F”.1.Forests are the hearts of the earth.()2.In many countries,f
9、orests were cut down to make money.()3.These young men and women face many difficulties when they plant new trees.()4.Even though tree planting is very difficult,they love their work.()TFTF1.Read the passage and answer the questions on Page 50.1.How do you understand Forests are the lungs of the ear
10、th?Forests can remove carbon dioxide from the air and make oxygen.2.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 wor
11、k.(3)They carry heavy bags of small trees,and working in the mountains can be dangerous.3.Why do they plant different kinds of trees?They plant different types of trees so that birds and animals can live in the forests.4.What will happen if we do not plant new forests?The forests will become less an
12、d less.We cannot breathe without them.5.Would you like to be a tree planter when you are older?Why or why not?Key points1.need sth./sb.to do sth.需要-做-2.remove-from-从-中除去-3.provide stb.to do sth.提供-做-4.type=sort=kind 种类 eg.all sorts/kinds/types of5.so that=in order that +从句 “目的是，以便”in order to do sth
13、.=to do sth.=so as to do sth “为了”6.in+一段时间 表示“在.之后”时，常用于一般将来时，用how soon 提问。eg.They will arrive in Beijing in two days.How soon will they arrive in Beijing?7.face many difficulties 面临许多困难 Key points8.marry sb./be married to sb.与某人结婚 9.stop+doing sth.停止正在做的事 stop+to do sth.停下来（目的是）去做另一件事eg.When we mee
14、t our friends on the way,we should stop to say hello to them.10.dry adj.干燥的，雨少的，干性的 v.使干，弄干，擦干11.even though/even if 即使，尽管，虽然 12.lose ones weight 减肥 13.allow doing sth.允许做什么 allow sb.to do sth.允许某人做什么 sb.be allowed to do sth.eg.The workers are allowed to have a rest only on Sundays How can we become
15、 a greener person?Turn off the lights when we leave a room.Walk or ride a bike instead of taking a bus or a taxi.Take a cloth bag when we go shopping.Dont drive a car if you travel a short distance.Write on both sides of the paper.Dont use the things that can be used only once.After we wash faces,we
16、 can use the water to wash clothes.Turn off the TV set while we are away.Free talk 2.Give your points for your answers.What is your total?Compare your result with your group members and tell the class who is the greenest in your group and answers is the greenest person in our group.Because he often
17、recycles newspapers and cans.and he also writes on both sides of the paper.He never uses paper towels.He usually takes a shower.After he washes faces,he can use the water to wash clothes.He seldom eats fast food,he thinks it is bad for his health.When he has a short journey,he usually walks or rides
18、 a bike,sometimes goes by bus intead of driving a car.When he sees others littering,he must stops them and asks them to pick it up,or he will do it by himself.Each time he goes shopping,he will takes baskets or cloth bags with him.When he leaves a room at school or at home,he always turns off the li
19、ghts,the TV or the computers.So wu must learn from him.Exercises in class1.需要-做-2.从-中除去-3.提供-做-4.全世界5.面临许多困难6.与某人结婚7.减肥8.允许做什么9.允许某人做什么need sth./sb.to do sth.remove-from-provide stb.to do sth.around the worldface many difficultiesmarry sb./be married to sb.lose ones weightallow doing sth.allow sb.to
20、 do sth.Exercises in class1.Help others whenever you can _ youll make the world a nicer place to live in.A.or B.and C.but D.while2.Cross the road carefully,_ youll keep yourself safe.A.so B.or C.but D.and 3.Hurry up,_ youll be late for the concert.A.or B.so C.but D.and 4.-Tell us something about Can
21、ada,OK?-Im sorry._ Jack _ I have ever been there.A.Either,or B.Not only,but also n C.Both,and D.Neither,nor 5.I always enjoy visiting London,_ I wouldnt like to live there.A.because B.so C.but D.and 6.There are many sports lovers in his office.Some love climbing,_ others enjoy swimming.A.Or B.for C.
22、whileD.so 7._ she _ I know his telephone number,because it has been changed.A.Both;and B.Either;or C.Not only;but also D.Neither;nor BDADCcDWe learn:1.Some words:dry,remove,replace 2.Some phrases:remove sth.from sth.;face difficulties;even though 3.Some sentences:(1)Without them,it cannot breathe.(2
23、)They plant different types of trees so that birds and animals can live in the forests.We can:1.Use the compound sentence correctly.2.Realize the importance of the forest.Summary1.Read 1a.2.Memorize the useful expressions and key sentences which we learn in this topic.3.Finish Section D in your workbook.4.Write a short passage to encourage more people to plant more trees.(the importance of trees,what should be done,how to do it,etc.)5.Review what we learn in this unit.Homework