1、3Unit 2 We have not found life on any other planets yet.Warming Up1. How many planets are there in our solar system?2. Is there any life on other planets?Put the words and expressions in the box in order: small large. galaxy, planet, solar system,star, universe 3213451. planet 2. star 3. solar syste

2、m4. galaxy 5. universe天體系統的層次天體系統的層次月球月球地球地球地月系地月系太陽系太陽系河外星系河外星系其他恒星系其他恒星系銀河系銀河系總星系總星系其他行星其他行星衛星系衛星系The Milky Way Galaxy銀河系主體部分的直徑約為銀河系主體部分的直徑約為10萬光年萬光年銀 河 系銀河系有太陽這樣的恒星銀河系有太陽這樣的恒星20002000多億顆多億顆The solar systemthe Earththe sunthe moonMars 火星火星Venus 金星金星 Mercury 水星水星 Jupiter 木星木星Saturn 土星土星Uranus 天王星天

3、王星Neptune 海王星海王星1. Teaching aims: To be able to summarise a passages To be able to describe a picture using the present perfect.Teaching aims2. Main contents:Key vocabulary group, light, impossible, take, out, communicateKey structures However, we have not found life on any other planets yet. Scient

4、ists have also discovered many other galaxies in the universe./nn /InvaIrnmnt/t /sl/sIstm/沒有一人；沒有一個；沒有一人；沒有一個；一點兒也沒有一點兒也沒有none環境環境 n.environment那那, 那個那個(指代已被提及的事物指代已被提及的事物) pron.solar太陽的太陽的;與太陽有關的與太陽有關的 adj.系統；體系系統；體系 n. thatsystemWords and expressions星系星系;（尤指）太陽系（尤指）太陽系solar system/gru:p /glksI/ju:

5、nIv:s /laIt/Impsbl/at/kmmju:nIkeIt/群；組群；組 n.group星系星系 n.galaxy宇宙宇宙 n.light光；光線；光亮光；光線；光亮 n.辦不到的，不可能的辦不到的，不可能的 adj.universeimpossibleWords and expressions聯系；交流聯系；交流 municate在遠方在遠方 adv.outShenzhou-9 is a manned spaceship.1. Work in pairs. Look at the picture and talk about what you know about Chinese

6、spaceships.When you read a passage with a title and pictures, think about the words you may find in the passage, and the questions you may want to ask before you start to read.2. Read the passage and choose the best title for it. Anyone out there? 2. Life on the earth 3. The sun and other stars 4. T

7、he stars at night_ Scientists think that there has been life on the earth for hundreds of millions of years. However, we have not found life on any other planets yet.1. Anyone out there? The earth is a planet and it goes around the sun. Seven other planets also go around the sun. None of them has an

8、 environment like that of the earth, so scientists do not think they will find life on them. The sun and its planets are called the solar system, and our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. There are billions of stars in the G

9、alaxy, andour sun is only one of them. Scientists have also discovered many other galaxies in the universe. They are very far away and their light has to travel for many years to reach us. So how large is the universe? It is impossible to imagine. Scientists have sent spaceships to the planet Mars t

10、o take photos. They have evensent spaceships to travel outside the solar system. However, no spaceship has travelled far enough to reach other stars in our Galaxy. Scientists have always asked the questions: with so many stars in the universe, are we alone, or is there life out there in space? Have

11、there been visitors to the earth from other planets? Why has no one communicated with us? We do no know the answers. yet.1. Scientists think that there has been life on the earth for hundreds of millions of years. 科學家認為地球上的生命已存在了數億年?？茖W家認為地球上的生命已存在了數億年。 hundreds of millions of 數億數億 We paid hundreds o

12、f millions of dollars in taxes. 我們交納了數億美元的稅金。我們交納了數億美元的稅金。Language points 數詞在表示模糊數目的短語中用復數形式，數詞在表示模糊數目的短語中用復數形式，且后面要加上且后面要加上of。hundreds of 數以百計的數以百計的thousands of 數以千計的數以千計的millions of 數以百萬計的數以百萬計的billions of 數以億計的數以億計的, 數十億的數十億的百、千、百萬、十億如果和具體數字連用，百、千、百萬、十億如果和具體數字連用，百、千、百萬、十億須用單數形式。如：百、千、百萬、十億須用單數形式。

13、如：six hundred two thousand nine million seven billion1. It is said that the disease has killed more than_ people worldwide. A. two hundreds B. two hundreds C. two hundreds D. two hundred2. _ Chinese are looking for ways to learn English well. A. Thousand B. Thousands C. Thousand of D. Thousands of即學

14、即練即學即練DDe.g. There are billions of stars in the Galaxy, and our sun is only one of them.銀河系中有數十億顆恒星，我們的太銀河系中有數十億顆恒星，我們的太陽只是其中的一個。陽只是其中的一個。2. However, we have not found life on any other planets yet.然而，我們還沒有在任何其他行星上然而，我們還沒有在任何其他行星上發現生命。發現生命。yet 用于否定句和疑問句，意思是用于否定句和疑問句，意思是“還，還，尚尚”。not yet 的意思是的意思是“還沒，尚

15、還沒，尚未未”，表示某事物在某一時間尚未發生，表示某事物在某一時間尚未發生，但未來也許會發生。例如：但未來也許會發生。例如：I havent learnt any farther information yet. 我還沒有得到進一步的信息。我還沒有得到進一步的信息。Have you received her letter yet?你收到她的來信了嗎？你收到她的來信了嗎？2. The earth is a planet and it goes around the sun. Seven other planets also go around the sun. 地球是顆行星，它圍繞著太陽轉。此外

16、還地球是顆行星，它圍繞著太陽轉。此外還 有有七顆行星也圍繞著太陽轉。七顆行星也圍繞著太陽轉。1) 七顆行星指的是：水星七顆行星指的是：水星（Mercury)、金星、金星 (Venus)、火星、火星(Mars)、木星、木星 (Jupiter)、土星、土星（Saturn)、天天王星王星 (Uranus)和海王星和海王星(Neptune)。 2) go around: 繞著繞著運轉運轉 The Earth goes around the Sun. 地球繞著太陽轉。地球繞著太陽轉。 Lets go around the town, not through it. 我們繞過這城鎮吧，不要穿過去了。我們繞

17、過這城鎮吧，不要穿過去了。3) other/the other/others/another這幾個相類似的詞是學生容易弄混淆的，其這幾個相類似的詞是學生容易弄混淆的，其實意思大相徑庭。實意思大相徑庭。other其它的（人或物）其它的（人或物）, 后面經常跟可數名后面經常跟可數名詞復數形式；詞復數形式；We havent found life on other planets yet.我們還沒有在其它的星球上發現生命。（其我們還沒有在其它的星球上發現生命。（其他的星球不可能只有一個）他的星球不可能只有一個）the other（兩者中的）另一個（兩者中的）另一個,后面不可能跟后面不可能跟復數形式；

18、復數形式；He has two daughters. One is a teacher, the other is a doctor.他有兩個女兒，一個是老師，另一個是醫生。他有兩個女兒，一個是老師，另一個是醫生。（有且只有兩個，兩者中的另一個）（有且只有兩個，兩者中的另一個）others其它的人或物（已經包括在內）其它的人或物（已經包括在內）, 后面后面不能跟名詞，本身就含有名詞的含義；不能跟名詞，本身就含有名詞的含義；Some people came by car, others came on foot.有些人是坐汽車來的，其他人是走著來的。有些人是坐汽車來的，其他人是走著來的。（oth

19、ers后面不能再加名詞）后面不能再加名詞）another（三者以上中的，或不知道數量的）（三者以上中的，或不知道數量的）另一個另一個, 后面也不可跟復數形式。后面也不可跟復數形式。Would you like another cup of tea?你要再來有一杯茶嗎？（泛指再來一杯）你要再來有一杯茶嗎？（泛指再來一杯）4) also adv. 也，同樣；而且（不與否定式也，同樣；而且（不與否定式動詞連用）動詞連用）She speaks French and German and also a little Russian.她會說法語、德語，還會說一點兒俄語。她會說法語、德語，還會說一點兒俄語。

20、He is young and good-looking, and also very rich. 他又年輕又漂亮，而且還很富有。他又年輕又漂亮，而且還很富有。I teach five days a week and I also teach evening classes.我每星期教五天，而且還教晚上的課。我每星期教五天，而且還教晚上的課。比較：比較：also/too/as wellalso, too, as well都指句中有關詞語與前面都指句中有關詞語與前面提到的事物相結合或相一致，這三個詞語提到的事物相結合或相一致，這三個詞語的雅俗程度和在句中的位置有所不同。的雅俗程度和在句中的位置有

21、所不同。 also含較莊重色彩，通常用于主要動詞含較莊重色彩，通常用于主要動詞之前（但若主要動詞為之前（但若主要動詞為be，則放于其后），則放于其后）e.g. Ive met Jane and Ive also met her mother.我已見到簡，我也見到了她的母親。我已見到簡，我也見到了她的母親。She was rich, and she was also selfish.她很富，她也很自私。她很富，她也很自私。too和和as well比較通俗，通常用于從句的句尾。比較通俗，通常用于從句的句尾。e.g.Ive read the book and Ive seen the film as

22、 well/too.我看過這本書，也看過這部電影。我看過這本書，也看過這部電影。3. None of them has an environment like that of the earth 沒有一顆行星擁有與地球一樣的環境沒有一顆行星擁有與地球一樣的環境 none 表示（三個以上）一個也沒有。表示（三個以上）一個也沒有。意為意為“沒有一個人沒有一個人/東西東西”，none作主語時，謂語作主語時，謂語的單復數形式要根據實際情況來定。的單復數形式要根據實際情況來定。如：如：None of them has been to Beijing.他們中沒有一個人到過北他們中沒有一個人到過北京。（京。

23、（none指代可數名詞，指代可數名詞， 強調單一性，謂語用單數形式強調單一性，謂語用單數形式）None of them were aware of the danger.他們都沒有意識到危險。他們都沒有意識到危險。（none指代可數指代可數名詞名詞，強調整體性，謂語用復數形式強調整體性，謂語用復數形式）None of the money is his.這些錢沒有他的份兒。這些錢沒有他的份兒。（none指代指代不可數不可數名詞，謂語動詞用單數形式名詞，謂語動詞用單數形式）注意：注意：none 與與no one（nobody） 的區別：的區別：none既可指人也可指物，通常與表范圍的既可指人也可指

24、物，通常與表范圍的of 短語連用；短語連用；no one(=nobody)只能指人，不能與只能指人，不能與of 短語連用。短語連用。如：如：_ of the reasons was true. A. None B. No one C. All (2) none與數量有關，可回答與數量有關，可回答how many問句，表示問句，表示“一個一個也沒有也沒有”；而；而no one表示表示“什么人也沒有什么人也沒有”，可回答，可回答who問句。問句。如如： -Who are you speaking to?-_.-How many students are there in the room?-_.A

25、No oneNone4. . and our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way.我們的太陽系只是一個由恒星和行星組成我們的太陽系只是一個由恒星和行星組成的星系的一小部分，這個星系比太陽系大得多，的星系的一小部分，這個星系比太陽系大得多，稱作銀河系或銀河。稱作銀河系或銀河。 這里的這里的the Galaxy專指專指“銀河系銀河系”，也可以，也可以 稱作稱作the Milky Way。而。而galaxy則泛指則泛指“

26、星系星系”。例如：例如：Scientists have discovered a distant galaxy.科學家發現了一個遙遠的星系?？茖W家發現了一個遙遠的星系。這里的這里的the Galaxy專指專指“銀河系銀河系”，也，也可以稱作可以稱作 the Milky Way。而。而galaxy則則泛指泛指“星系星系”。e.g. Scientists have discovered a distant galaxy.科學家們發現了一個遙遠的星系。科學家們發現了一個遙遠的星系。本句中本句中called the Galaxy or the Milky Way為為過去分詞短語做定語，修飾過去分詞短語

27、做定語，修飾a much larger group of stars and planets。類似的例子還有：類似的例子還有：They have a two-year-old son called Mike.他們有一個兩歲的兒子叫邁克。他們有一個兩歲的兒子叫邁克。5. However, no spaceship has travelled far enough to reach other stars in our Galaxy.然而，還沒有任何航天器能到達銀河系里然而，還沒有任何航天器能到達銀河系里的其他恒星。的其他恒星。adj./ adv. + enough to do表示表示“到達到達程

28、程度，會發生某結果度，會發生某結果”。 not + adj./ adv. + enough + to do sth. 不不夠夠可以可以He is old enough to go to school. 他到上學的年齡了。他到上學的年齡了。 (1) 我們有足夠的錢花。我們有足夠的錢花。 We have _. (2) 他跑得夠快，很快追上了我們。他跑得夠快，很快追上了我們。 He ran _ catch up with us soon. (3) 他年齡不夠大，照顧不了自己。他年齡不夠大，照顧不了自己。 He_. enough money to spendfast enough toisnt old

29、 enough to look after himself6. . with so many stars in the universe, are we alone, or is there life out there in space?宇宙中有這么多星球，我們是孤獨的宇宙中有這么多星球，我們是孤獨的 嗎，嗎，抑或太空中還有其他生命存在呢？抑或太空中還有其他生命存在呢？ 這里這里with so many stars in the universe是介是介 詞短語，在句中作狀語。詞短語，在句中作狀語。with + 名詞名詞 + 介詞短語介詞短語,在句中做狀語，在句中做狀語，表示表示伴隨情況伴隨

30、情況。With so many things to do, we have no time to play.要做的事情這么多，我們都沒時間玩要做的事情這么多，我們都沒時間玩 兒了。兒了。alone 在句中作形容詞，不作定語只做在句中作形容詞，不作定語只做表語，也可作副詞。意思是表語，也可作副詞。意思是“獨自地獨自地”。e.g. She was alone in that dark room. And she feels lonely.她獨自一人呆在那黑屋子里。她獨自一人呆在那黑屋子里。她覺得很孤單。她覺得很孤單。lonely 在句中作形容詞，作表語，強調在句中作形容詞，作表語，強調人的感覺。意

31、思是人的感覺。意思是“孤獨的孤獨的”。 alone adj.孤單的，孤獨的孤單的，孤獨的 在句中作形容詞，在句中作形容詞，不作定語只做表語，也可作副詞。意思是不作定語只做表語，也可作副詞。意思是“獨自地獨自地”。I dont like going out alone after dark.我不喜歡天黑后獨自外出。我不喜歡天黑后獨自外出。比較：比較：alone/lonelyalone表示獨自一人；表示獨自一人；lonely表示心靈上的孤單。表示心靈上的孤單。Although Im alone, I dont feel lonely.雖然我獨自一人，但是我不感到孤單。雖然我獨自一人，但是我不感到孤

32、單。1. The earth is a star. 2. The sun is a star. 3. There is more than one galaxy in the universe. 4. The light from the stars in other galaxies has travelled for a long time to reach us. 5. Scientists have received many messages from space. 6. Spaceships have visited most of the universe. 3. Check (

33、) the true sentences. Is there life on other planets? There are seven other planets in our (1) _ ，but (2) _ of them has a(n) (3)_ like that of the earth. Spaceships from the4. Complete the passage with the words and expression in the municate environment none solar system universesolar systemnoneenv

34、ironmentearth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried to (4) _ with us? It is true thatscientists have not discovered life on other planets in the (5) _ yet, but some scientists believe that they will find it some munica

35、teuniverse6. Look at the picture from a science story for children and answer the questions.What have the scientists just received?(a message from one of our spaceships)They have just received a message from one of our spaceships. Where has the spaceship landed? (Mars)2. What has the spaceship disco

36、vered? (people on Mars)The spaceship has landed on Mars.The spaceship has discovered people on Mars.3. Why have the people on Mars not sent us a message? (do not know how to)4. Why have the people on Mars not visited us on the earth? (do not know how to) Because they do not know how to sent us a mes

37、sage to us. Because they do not know how to get to the earth.6. Write a passage to describe the picture. Use your answers to the questions in Activity 5 to help you.We have just received a message from our spaceship to Mars We have just received a message from our spaceship to Mars. Our spaceship ha

38、s discovered aliens there. They have never sent us a message because they dont know how to communicate with us. They have not visited the earth because they dont know how to fly to our planet, and they prefer life on Mars. They seem very happy on their planet. They have used parts from the other spa

39、ceships from the earth to make TVs, radios, etc. We hope they dont do the same with this one!Possible answer單項選擇1. In the world _ people like watching TV. A. millions of B. two millions C. two million of D. two million of （中考真題）（中考真題）2. Basketball is so popular a game in the world that _ people play

40、 it for fun and exercise. A. million of B. millions of C. millions D. two millions of （中考真題）（中考真題） A BExercise 3. _ girls took part in the Super Girl Competition, but only few of them succeeded. A. One million of B. Millions of C. Two millions D. Two million of （中考真題）（中考真題）4. Every year _ people in

41、this country lose their jobs. A. many millions B. millions of C. millions D. two millions （中考真題）（中考真題） B B5. The spaceship _ will go around the earth in 2005 will be called Shenzhou . A. which B. who C. whom D. what （2010三亞）三亞） 6. After playing football for more than half an hour, the students took

42、_ rest. A. a few minutes B. a few minutes C. a little minutes D. a little (2004 天津市天津市) A B7. How heavily it rained this early morning! Yes. But _ of the students in our class was late for school. A. some B. none C. all D. neither （09婁底）婁底） 8. I tried several jackets on, but _ of them looked good. A. both B. either C. none D. neither （2009中考真題）中考真題） BC1. Wheres Mr Green? He