1、Unit 2We have not found lifeearth moonRevisionspaceshipastronautspace travelLook at the picture and talk about what you know about Chinese spaceships.Shenzhou-9 is a manned spaceship.Work in pairsScientists think that there has been life on the Earth for hundreds of millions of years. However, we ha

2、ve not found life on any other plants yet.Read the passage.The Earth is a planet and it goes around the sun. Seven other planets also go around the sun. None of them has an environment like that of the earth, so scientists do not think they will find life on them. The sun and its planets are called

3、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 Galaxy, and our sun is only one of them. Scientists have also discovered many other galaxies in the universe. They are very far a

4、way 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 spaceship to the planet Mars to take photos. They have even sent spaceships to travel outside the solar system. However, no spaceship has travelled far enough

5、to reach other stars in our Galaxy.Read the passage and choose the best title for it. 1. Anyone out there? 2. Life on the earth 3. The sun and other stars 4. The stars at night 1. The earth is a star. 2. The sun is a star.3. There is more than one galaxy in the universe.Check () the true sentences.

6、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. Complete the passage with the words and expression in the municate environment none solar system universeIs th

7、ere 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. solar systemnoneenvironmentSpaceships from the earth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried t

8、o (4) _ with us? It is true that scientists have not discovered life on other planets in the (5)_ yet, but some scientists believe that they will find it some municateuniverse 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經(jīng)有億萬年 了。millions of

9、 數(shù)百萬 hundreds of 數(shù)百thousands of 成千上萬 billions of 數(shù)十億Language pointse.g. There are billions of stars in the Galaxy, and our sun is only one of them.銀河系中有數(shù)十億顆恒星，我們的太陽只是其中的一個。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發(fā)現(xiàn)生命。yet 用于否定句和疑問句，意思是“還，尚”。not yet 的意思是“還沒，尚未”，表示某事

10、物在某一時間尚未發(fā)生，但未來也許會發(fā)生。例如：I havent learnt any farther information yet. 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？3. 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(zhuǎn)。此外還有七顆行星也圍繞著太陽轉(zhuǎn)。 太陽系的其他七顆行星：水星(Mercury)、金星(Venus)、火星(Mars)、木星(Jup

11、iter)、土星(Saturn)、天王星(Uranus)、海王星(Neptune)。4. None of them has an environment like that of the earth, so scientists do not think they will find life on them.他們中沒有一個有像地球這樣的環(huán)境，因此科學家們認為在他們上面找不到生命。none of 表示（三個以上）一個也沒 有。做主語時，謂語動詞可用單數(shù)或復 數(shù)。e.g. None of us has/have been to the Mars. 我們中沒一個去過火星。5. our solar

12、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。這里的the Galaxy專指“銀河系”，也可以稱作 the Milky Way。而galaxy則泛指“星系”。e.g. Scientists have discovered a distant galaxy.科學家們發(fā)現(xiàn)了一個遙遠的星系。6. So how large is the unive

13、rse? Its impossible to imagine.所以宇宙有多大？我們無從想象。句型: It is + 形容詞 + to + 動詞原形，意思是“做某事很”e.g. It is difficult to read these words. 讀這些單詞很難。7. 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，我們是孤獨的嗎？或者太空中還有其他生命存在呢？with + 名詞 + 介詞短語，表示伴隨情況，意思是“帶著”。 e.g. Mr. Zh

14、ang is coming with a book in his hands.張老師手里帶著一書進來了。alone 在句中作形容詞，不作定語只做表語，也可作副詞。意思是“獨自地”。e.g. She was alone in that dark room.她獨自一人呆在那黑屋子里。 What have the scientists just received?(a message from one of our spaceships)They have just received a message from one of our spaceships.1. Where has the spac

15、eship landed? (Mars)It has landed on Mars. 2. What has the spaceship discovered? (people on Mars)3. Why have the people on Mars not sent us a message? (do not know how to)It has discovered people on Mars.We do not know how to send us a message.4. Why have the people on Mars not visited us on the ear

16、th? (do not know how to)We do not know how to visit us on the earth. 中考鏈接1. Wheres Mr Green? He _ to Changsha. (2013湖南湘西) A. have been B. has gone C. has been2. Is Tom at home? No, he_ to town. (2013天津) A. has been B. has gone C. goes D. will go 3. He promised to pick me up at the school gate. However, he _ yet. (2011安徽)A. didnt arrive B. doesnt arrive C. isnt arrivingD. hasnt arrived4. What is the weather