人教版高中英语必修二课件：Unit4 Using language (共43张PPT).ppt

1、Animal extinctionReading and listeningLook at these pictures and answer questions:They _a long time ago.disappeared/died outWhy,how and whenQ1:What are they?Q2:What happened to them?They are _dinosaursWhats your impression of the dinosaur?Large/hugestrongfierceviolentcruelHow much do you know about

2、dinosaurs?Pterosaur 翼龙Triceratops 三角龙Stegosaurus 剑龙tyrannosaurus霸王龙disaster?climate changing?over hunting?What might be the reasons for their extinction?GuessingWhen did dinosaurs live?Tens of millions of years ago,long before humans came into being.When did dinosaurs disappear?ReadingDinosaurs died

3、 out suddenly about 65 million years ago.What might be the possible reasons for their extinction?Maybe thats because a huge rock from space hit the earth and put too much dustinto the air or because the earth got too hot to live on.Detailed reading:True or false1.There were many different kinds of d

4、inosaur and all of them have been found in China.2.Not long ago,a rare new species of bird-like dinosaur was discovered in Henan Province.a numberLiaoningFF3.Some scientists are sure dinosaurs died out because the earth got too hot for the dinosaurs to live on any more.4.Dinosaurs died out suddenly

5、about 65 million years ago and many animals have disappeared in the last 500 years.FTthinkFor referenceThe sudden mass extinction of the non-avian dinosaurs,which occurred around 65 million years ago,is one of the most intriguing mysteries in paleontology(古生物学).The nature of the event that caused th

6、is mass extinction has been extensively studied since the 1970s.At present,several related theories are broadly supported by paleontologists:Asteroid collision Multiple collisionsEnvironment changeslong before“早在之前很久”.It will(not)be long before+从句(不久后将会.)从句用一般现在时或一般过去时,主句用一般将来时或一般过去将来时。Language poin

7、tsEx.It _ long before we_ the resultof the experiment.A.will not be;will know B.is;will knowC.will not be;know D.is;know拓展：before long 不久以后 come into being:形成,产生 漏油事件危害到了许多海鸟的生存，这促使了许多以保护鸟类为目标的社会团体形成_with oil spills _many sea birds,this has encouraged societies to _,whose _ is to save the birdsIncid

8、ents harmcome into beinggoal 我们的学校是1997年被建立的 Our school _ in 1997 A B set up was set up Our school _ in 1997 came into beingA B was come into beingcome into being 不可以用被动语态There is a story about how the word“sandwich”_A came into being B was came into being C came to power D was came to power accordi

9、ng to:按照，根据.所说 根据标题和图片,这篇文章主要讲的是什么内容？What is the main idea of the passage _ the _ and the picturesaccording totitle We are paid _ how much work we did _ many old people,he likes this kind of songA B C Daccording to according toas a result ofWith the help ofIn common with野生动植物保护基金会定期视察大熊猫保护区，结果 那里的大熊

10、猫得到了很好的保护。他们确保任何大熊猫捕猎者会受到惩罚，毫不留情The WWF _ the panda_ regularly _ the pandas there are well protected.They make sure that anyone who _ a panda will be punish _inspectsreserveso thathuntswithout mercyso that“结果”引导结果状语从句 Please speak loudly and clearly so that“为了”引导目的状语从句 sothat“如此以至于”We turned on the

11、light so that The flying carpet travelled so fast that next minute they were in Zimbabwewe may see what it was(为了)everyone can hear you(为了)so tahtPortuguese(Portuguese(葡萄牙人葡萄牙人)found the bird)found the bird when they got on the Island of when they got on the Island of Mauritius and named it Dodo.In

12、Mauritius and named it Dodo.In Portuguese,dodo means foolish and Portuguese,dodo means foolish and clumsy.clumsy.Name:DodoBirthplace:Island of Mauritius (毛里求斯)Figure:extremely bigFavorite food:fruitAppearance:bird-likeBefore listening to the dodos story,try to predict in pairs how it might have beco

13、me extinct.The change of weatherDodos killed each other.Human beings killed them.Lack of foodEnvironment was destroyed.Possible reasons of dodos extinction.Listen to the tape and choose the sentence on page 30 which gives the main idea of the story:A.This story is about how foolish the dodo was.B.Th

14、is story is about why the dodo became extinct.C.This story is about how the dodo and Man made friends.D.This story is about how the other birds and animals tried to save the dodo.No 1 is wrong.It is not fair to blame the dodo for his disappearance.No 3 only explains half the story.The dodo and man d

15、id become friends but only because man wanted to kill the dodos as easily as possible.No 4 is wrong because the other animals and birds did not do much to save the dodo.They warned him but did not help him.1.How did dodo get along with Man at first?His name was Man,and at first we seemed to be _ _.W

16、e went _ together and I _ my food with him.He went off _ _ he was going to hunt but instead he _ in the forest and waited.good friendseverywheresharedas ifhid2.When more dodos disappeared,what did the dodo do?QUESTIONSChoose the correct answer to complete each sentence.1.The dodo is_.A.fierce B.unki

17、nd C.friendly D.foolish2.He wants to believe that Man is telling the truth because _.A.Man is friendly B.he think Man is friendly C.he thinks the bears and monkeys lie D.Man is his best friend3.He didnt realize who had killed many of his friends until _.A.Man told him the truth B.the other birds tol

18、d him C.he saw how his friend was being killed by Man D.the monkeys told himThe story of the dodoOnce upon a time I lived on the island of Mauritius.I was called“dodo”.There were many of us and we were friends with all the other animals on the island.One day a new animal came to my island.His name w

19、as Man,and at first we seemed to be good friends.We went everywhere together and I shared my food with him.Listening textHowever,I began to wonder why several of my dodo friends had disappeared.Then the number of our species began to decrease quickly.I was so worried that I asked the other animals a

20、nd they all told me,“Your friends are being killed and eaten by Man while you are hunting forfood.”Had Man eaten them?I couldnt believe it!When I asked Man directly,he seemed surprised.“I havent seen the other dodos either.”he said.“Maybe someone else killed them.”I believed him but when more dodos

21、disappeared I set a trap.I went off as if I was going to hunt but instead I hid in the forest and waited.Sure enough Man came along.He ran after the last of my dodo friends and killed her.I felt so angry that I rushed out of my hiding place and straight at Mans spear.He killed me too.After that ther

22、e were no more dodos in the world.So my motto is:be careful who you trust.In pairs choose another endangered animal which you know about.Analyse why this animal is endangered.over hunted lack of foodhabitat is being threatenedFor exampleAnimal Habitat Reason for problemPolar bearWhite RhinoNorth Pol

23、eAfrica Warming of the seas means it is losing its habitat of ice flows1 Destruction of the grasslands where it lives 2 Hunting for its horn3 Too friendly and so easily caughtINTENTIONPURPOSEIm going to to help/saveI intend/mean/plan to to protect fromI will so that Discuss what you might do to save

24、 it.Useful phrasesI feel like Id like to Im ready to Id rather not in order to but do to teach them a lessonto punish those who do harm to wildlifeSupport zoos,reserves,and organizations that help animals.Volunteer your money,time and ideas.Everyone shares a responsibility in helping to save endange

25、red animals that live on Earth.Here are some ways we can help all wildlife:WAYS TO SAVE ENDANGERED ANIMALS Avoid buying any products made from endangered animals.Learn all about endangered animals and share this information with everyone.Dont pollute.Write a letter to WWF based on what you have disc

26、ussed,asking them to help you save your endangered animals.All letters have a start and an ending.The language used depends on how well the writer knows the person to whom he/she is writing.(pay attention to the guidelines on your book)FormalInformal Starts Dear,Hi,My dear,Dearest,Endings Yours sinc

27、erely,Sincerely,Sincerely yours,Yours truly,Yours faithfully,Love,Cheers,Regards,Best wishes,Yours,Step 1:Collect your ideas for the letter and write down as notes.Step 2:Begin your letter like this:Dear WWF,I live on an island near Step 3:Finish the letter by writing:Yours sincerely.(your name)Step

28、 4:Check your writing and share your ideas with the class by reading them aloud.Formal start to the letterBodyFormal ending to the letterSample letter to WWFDear WWF,My friend,Chen Ting,and I have been doing some research on endangered animals.We found that the habitat of polar bears is disappearing

29、 because the ice at the North Pole is getting warmer.I worry that when is disappears altogether,there will be nowhere for the polar bears to live.First,I suggest we are very careful with the energy we use.Global warming happens because we are putting too much carbon dioxide into the air.One of the w

30、ays we do this is by driving everywhere by car.So I suggest we think carefully before using our cars unnecessarily.Second,instead of using our cars we should think about traveling by bus or by train.These forms of transport are more environmentally friendly and do not put so much carbon dioxide into

31、 the atmosphere.Third,we can join WWF which is fighting to save the habitat of the polar bear.We can raise money to help them by making and selling cakes,selling crafts or giving talent shows and charging money for our parents to watch.I hope you will support us in our fight to save the home of the Polar Bears.Yours sincerely Wu Xiao XingHomework1.Review the words and expressions weve learned.2.Finish the exercises on the Workbook.