九年级Unit2Topic 2教案.doc

2012-2013学年上学期九年级英语备课组教案NameDateSept. 14thPeriod7TopicUnit2Topic2Class typeNewTeaching aims Section A1. Learn a new word and some phrases:as a result, behavior, in the beginning, day by day, die out2. Learn some useful sentences: (1)As a result, air pollution has become a serious problem. (2)Humans have come to realize the importance of protecting animals.3. Learn the indefinite pronoun and adverb:(1) None of us likes pollution. (2) Dont spit anywhere in public. (3) Everyone should care for wild animals and plant more trees. 4. Learn the importance of protecting the environment. Section B1. Learn some new words and phrases:sand, cut down, change into, prevent, prevent from, human being, although, law, turn off2. Learn some useful sentences: (1) Trees can stop the wind from blowing the earth away. (2) Pass laws against water pollution. (3) Remember to turn the tap off when you leave.3. Continue to learn the indefinite pronoun and adverb.4. Learn to talk about pollution and its harm.Section C1. Learn some new words and phrases:on earth, period, millions of, take away, rise, level, refer to2. Learn some useful sentences: (1) When it rains or when the wind blows, the earth is taken away. (2) The heat from the sun cant escape so the temperature is rising.3. Learn to talk about the harm of pollution:(1) Forests have become deserts, so more and more sorts of animals and plants are disappearing.(2) As a result, many rivers and lakes are now dead. (3) Too much harmful radiation from the sun passes through the hole and reaches the earth directly.(4) It causes the level of the oceans to rise and the climate of the earth to change.4. Develop the students sense of environmental protection. Section D1. Learn a new phrase: take up2. Learn some useful sentences: (1) This harms the environment (2) At the same time, dealing with (3) Of all the garbage, about 35 percent can be recycled while the rest cant. (4) How shall we deal with it?3. Review the indefinite pronoun and adverb:(1) None of us likes pollution.(2) Dont spit anywhere in public.(3) Everyone should care for wild animals and plant more trees.(4) We should do everything we can to protect the environment. 4. Talk about the harm of rubbish. 5. Go on developing the students sense of environmental protection. Important points1. Learn the indefinite pronoun and adverb:(1) None of us likes pollution. (2) Dont spit anywhere in public. (3) Everyone should care for wild animals and plant more trees. 2. Learn to talk about the harm of pollution:(1) Forests have become deserts, so more and more sorts of animals and plants are disappearing.(2) As a result, many rivers and lakes are now dead. (3) Too much harmful radiation from the sun passes through the hole and reaches the earth directly.(4) It causes the level of the oceans to rise and the climate of the earth to change.Difficult pointsLearn the indefinite pronoun and adverb:(1) None of us likes pollution. (2) Dont spit anywhere in public. (3) Everyone should care for wild animals and plant more trees. Teaching stepsSection A备注 Teaching procedureReview(教师收集一些有关污染的图片，让学生说出它们分别属于哪种污染，有何危害并提出解决建议。)T:What kind of pollution is it?Ss:It is noise pollution.T:What harm can it cause?S1:It can disturb others and make people feel uncomfortable and unpleasant.S2:It does great harm to peoples hearing. It can even make people sick or deaf.T:Good. How should we solve this problem?S3:Dont always listen to loud pop music.S4:Dont make a loud noice in public.Lead-in(教师创设一个空气污染的情境，引入本课话题。例如：教师一边拍身上的灰尘，一边咳嗽着走进教室，然后描述。)T:It is too dirty and there is too much heavy smoke outside. I cant stand it.1. (教师展示1a的图片，导入新课。)T:Do you like the environment here?Ss:No, we dont.T:Why?Ss:Because there is too much smoke. Its a serious air pollution.T:Very good. We should stop burning coal. It is said that China has become the worlds largest producer and user of coal. As a result, air pollution has become a serious problem.T: Now our government has realized the importance of protecting the environment.T: We should do something useful to protect the environment, too.T: Can you tell me what we should do?S1:We shouldnt leave rubbish here and there.S2:Dont spit anywhere in public.S3:Dont walk on grass.S4:Check the preview (1)Whats the article about?(2)What should we do and not do to protect the environment?Teaching the new lesson不定代词和不定副词的用法：1）some-复合代词/副词常用于肯定句；如：I saw someone in the room. 我看见房间里有人。There is something in the woods. 树林里有什么东西。He has gone somewhere warm for his holiday. 他去暖和的地方度假了。2）any-复合代词/副词常用于否定句或疑问句；如：I didnt see anyone in the room. 我没看见有人在房间里。There isnt anything in the woods. 树林里没有什么东西。He hasnt gone somewhere warm for his holiday.他没去暖和的地方度假。3）no- 复合代词/副词表全否定；如：I saw nobody in the room. 我看见房间里没有人。There is nothing in the woods. 树林里没有什么东西。4）every- 复合代词/副词代替全部；如：Everyone is here. 大家都在这儿。It seems he knows everything. 似乎他知道一切。5）some-复合代词/副词用于疑问句中时，表希望得到对方的肯定回答或表请求；如：Would you like something to drink? 你要点喝的东西吗？6）any-复合代词/副词用于肯定句时，表“任何”；如：If people spit anywhere in public, they should be punished. 如果人们在公众的任何地方吐痰，他们应该受罚。 7）不定代词作主语时，谓语动词用单数形式；如：No one knows this secret. 没有一人知道这个秘密。Everything goes well. 一切进展顺利。8）如果有定语修饰,定语应放在不定代词或不定副词后；如：I have something important to tell you. 我有重要的事告诉你。There is nobody strange here. 这儿没有一个陌生人。no= not any nobody = not anybody; nothing = not anything她什么也没说。She didnt say anything. = She said nothing. 这儿没有一个陌生人There is nobody strange here.= There isnt anybody strange here.1. sth. + says thatsay表用“文字、数字”说明信息。It says that 它显示/写着/提到如：卡片上写着“新年快乐！”。It says “ Happy New Year!” on the card. 这面钟显示现在是20：00。The clock says that it is 20:00 now.补充:be said that /be said to do sth. 据说eg: It is said that he is a rich man. 据说他是个有钱人。 He is said to be a rich man.2. as a result 结果eg: As a result, we were all late for class.结果我们都迟到了。as a result of 由于As a result of ill health, he couldnt go on working any longer. 由于健康状况不佳，他不能继续工作了。3. do something useful to do sth. 采取有效的措施做某事=take some useful measures to do sth.4.none 可指人、物nobody, no one 只能指人none of +名词复数+谓语动词单复数都可以eg:（指人）我的朋友们没有一个喜欢画画。None of my friends like/ likes drawing.eg:（指物）这些书他一本都没看过。He has read none of these books. none of +不可数名词+谓语动词单数eg：None of the work was done.eg: 没有一个在这儿。No one is here.拓展：none回答how many/ much的问题；no one回答who的问题。 如：A: How many students come to school by taxi? B: None. 有多少的学生搭出租车来上学？ 没有人。A: How much water is there in the bottle? B: None. 瓶子里有多少水？ 一点儿也没有。 A: Who is in the room? B: No one. 谁在房中？ 没有人。5. here and there = everywhere 到处6. give some advice to sb=give sb some advice 给提出一些建议 a piece of advice 一条意见take /follow ones advice 听的意见7. even worse 甚至更糟8. in the beginning =at first 起初 at the beginning of 在的开头9. come to realize 开始意识到10. the importance of 的重要性11. read the article 读这篇文章Exercise in class一、根据中文提示完成句子。(1) It is a little difficult to understand him _ _ _（一开始）.(2) We shouldt speak loudly _ _ （在公共场合）.(3)He seldom exercise ._ _ _（结果） , he is not in good health .(4) I believe our life will become more and more exciting _ _ _（一天天地）.(5)In winter ,you can see snow _ _ _(到处) in harbin .SummaryAll these problems are very serious. Section Aas a resultBut the government is doing something useful to protect the environment.something usefulNone of us likes pollution.in the beginningDont spit anywhere in public.day by dayEveryone should care for wild animals and plant more trees.die outWe should do everything we can to protect the environment.Homework1. Recite the new words and finish the exercise.2. Recite 23. Preview Section BThoughts after teachingTeaching stepsSection B备注Teaching proceduresReviewnoneothersomethingeveryone everybodynobodyanythingeverywhereanybodyothers以抢答的形式完成下列句子。(1) None of us knows how to stop the bad behavior.(2) I knocked on the door but nobody answered.(3) Some of these books are better than others.(4) She was driving the car with one hand and wiping the window with the other.(5) They are beautiful but I am looking for something useful.(6) You cant believe anything she says.(7) Therere 5 000 people living here and almost everyone/everybody has his/her own car.(8) Hes cleverer than anybody I know.(9) Ive looked everywhere but I cant find it.Lead-inT:Look at Picture 2 in 1c.T:(指着第二幅图。) Is the scenery beautiful?Ss:Yes.T:OK. Lets look at Picture 4. Is it beautiful?Ss:No.T:What has happened to the forest?Ss:It has gone.T:Yes. People have cut down too many trees.T:Please look at Picture 1. A lot of earth has been washed away. Why?Ss:Because people have cut down (教师引导学生回答。)T:Thats right. Trees can prevent the water from washing the earth away.T:Lets look at Picture 3. Oh, my goodness! The forest has changed into desert.T:Please look at Picture 5. Whats the weather like?Ss:Its bad.T:I agree with you. The wind is blowing strongly with lots of sand. We call it sandstorm.T:Is cutting down trees good or bad for us?Ss:Its bad.T:Very good. Its harmful not only to human beings, but also to animals and plants.T:So what can we do to protect the environment? Discuss in groups of four.(给学生两分钟，让他们讨论。)S1:Plant more trees.S2:Stop cutting down trees.S3:T:Good idea. Although we have done a lot to protect the environment, its not enough yet. Lets work harder.Check the preview (1) Whats the weather like today?(2) What should we do to protect the environment?Teaching the new lesson1.sand 不可数n much sand 许多沙子a grain of sand 一粒沙子2. cut down 砍伐，减少，降低eg: The article should be cut down to 1000 words.cut sth. in halves 把切成两半cut sth. into pieces 切碎cut up 切碎cut off 切断3. change into = turn into 把.(转)变成. 如：eg:请把英语变成汉语。Please change/ turn English into Chinese. eg:当交通灯变成绿色时,我们就可以通行。When the traffic lights change/ turn into green, we can go4. stop / prevent sb. /sth. (from ) doing sth. 阻止/ 防止某人或某物做某事keep sb./sth. from doing sth. 阻止/ 防止 某人或某物做某事eg: Nothing can stop/keep/prevent him from working.5. can be saved 可以被储存save patients lives 挽救病人的生命save every drop of water 节约每一滴水6. remember/forget to do sth. 记得/忘记去做某事（未做）eg：Remember to turn the light off when you leave. remember/ forget doing sth. 记得/忘记做过某事（已做）eg: I remember seeing him once. 我记得见过他一次。7. turn on 开 turn off 关 turn up 开大 turn down 关小8. blow away. 吹走9. wash the earth away 水土流失10. change into desert 变成沙漠11. sandstorms come into being形成沙尘暴Exercises in class一、根据上下文意思及首字母提示填空。Tree are very useful to us. They can help p_1_the wind from b_2_the earth away and stop the s_3_from moving towards the rich land .Trees also s_4_the water from running away. They can keep a l_5_of water .So we must stop people from c_6_down too many trees .Otherwise a lot of rich land will change into d_7_. T_8_we are doing something to p_9_the environment ,we still have a l_10_way to go .1._ 2._ 3._ 4._ 5 ._6._ 7._ 8._ 9_ 10._SummaryAll these problems are very serious. Section Bcut downprevent from =stop from change into deserthuman beingTrees can stop the wind from blowing the earth away.although / but Pass laws against water pollution.turn offRemember to turn the tap off when you leave.Homework1. Recite 1a in Section B2. Finish the exercises of SectionB.Thoughts after classTeaching stepsSection C备注 Teaching proceduresReview T:How do you protect our environment and save water?S1:Everyone should plant more trees.S2:We should do everything we can to save water.S3:Everybody should know the importance of forests.S4:Pass laws against water pollution.S5:Collect and reuse waste water.Lead-in T:Whats the weather like today?Ss: Its T:As we know, Beijing often has sandstorms in spring. What causes the bad weather?Ss:Cutting down too many trees. (展示1a第二幅图画。)T:Yes. All over the world, people have cut down millions of trees. And trees become fewer and fewer.T:Cutting down too many trees causes the bad weather. How can trees affect the weather?S1:They can keep water from running away. S2:They can stop S3:T:Yes. Trees can stop the wind and water from taking the earth away.T:Anything else?Ss:(允许学生用汉语回答。)树能吸收二氧化碳并释放氧气。T:Thats right. Trees can breathe in carbon dioxide and breathe out oxygen.T:Where does CO2 come from?S4:Animals breathing.S5:Burning oil. For example, cars and buses.T:Yes. They have polluted the air. Carbon dioxide in the air has increased a lot. This has formed a “blanket” around the earth.(展示1a第五幅图。)Please look at the picture. T:The heat from the sun cant escape, so the temperature is rising.(T:This is called “the greenhouse effect”.T:Because of the greenhouse effect, what happens to the icebergs(冰川)?Ss:Some parts of them change into water.T:So it causes the level of the oceans to rise.T:(展示1a第4幅图。)Please look at this picture. Around the earth, theres a special kind of oxygen called “ozone”.T:But now air pollution is destroying it and that has made a very big hole in the ozone layer.T:Too much harmful radiation from the sun passes through the hole and reaches the earth.Check the preview Whats the weather like today?As we know, Beijing often has sandstorms in spring. What causes the bad weather?Teaching in class1. be good for 对有益 反：be bad for 对有害 be good at 擅长于 同：do well in 反：do badly ineg: Doing morning exercises is good for our health. Kangkang is good at swimming.2. while 然而=but 表示对比He is a worker, while I am a teacher.3. rise 升起eg: The sun rises in the east. 太阳从东方升起。 raise 使升高，举起，筹集Heavy rains raised the flood stage.暴雨使洪水水位上涨。4. destroy/ harm/ pollute the environment 破坏/损害/污染环境5. the greenhouse effect 温室效应6. the level of the oceans 海平面7. more carbon dioxide 过多的二氧化碳8. the ozone layer 臭氧层9. the +形容词比较级+（名）+（句子）,the +形容词比较级+（名）+（句子） 表示“越越”eg: The more, the better. 越多越好 The more exercise you take, the healthier you will be. 你做的运动越多， 你就越健康。10. refer to sb./sth.涉及，有关，提到eg:我们一致同意永远不再提这件事。We agreed never to refer to the matter again.11. take away 拿走，取走Exercises in class一、根据中文提示及首字母完成句子。(1) The river is at its highest _（水平线）.(2) Tom is very tall w _ his father is very short .(3) He has _ _（取走）his books.(4)Have you ever heard of _ _ _（温室效应）.(5)Internet has changed our lives_ _ _(在许多方面) .Summary All these problems are very serious. Section Cmillions of When it rains or when the wind blows, the earth is taken away.take awayAs a result, many rivers and lakes are now dead. refer toThe heat from the sun cant escape so the temperature is rising.It causes the level of the oceans to rise and the climate of the earth to change.Homework1. Finish the exercises in the exercise book.2. Recite 1b3. Preview Section DThoughts after classTeaching steps Section D备注Teaching proceduresReview T: After learning Section C, we have known that many kinds of pollution affect our environment. How do factories affect our environment?S1: They / Factories have polluted the land and the water. S2: Factories make some rivers and lakes dead now.S3:T: Very good. How do cars and buses affect our environment?S4: They have polluted the air. S5: They have caused noise pollution. S6: T:How does cutting down too many trees affect our environment?S7:Some forests have changed into deserts. S8:More and more different sorts of animals and plants are disappearing. S9:When it rains or when the wind blows, the earth is taken away.Lead-inT:OK. Now lets talk about another serious problem.(教师展示1a中的图片。)T:Whats in the picture?Ss:Waste./Rubbish.T:How do people deal with the waste?Ss:Put it into the land.T:So the waste takes up a lot of land and it does great harm to our environment.(板书并要求学生掌握。) take upT:In fact, some of the rub