八年级下M3Unit2.ppt

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1、earth moonspaceshipastronautspace travelScientists have sent spaceship to Mars. The journey has taken several months. Astronauts have already been to the moon.No one has been to Mars yet, because Mars is very far away, much farther than the moon.Lots of scientists are working hard in order to send a

2、stronauts to Mars one day.Look at the picture and talk about what you know about Chinese spaceships.Shenzhou-9 is a manned spaceship.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

3、. The sun is a star.3. There is more than one galaxy in the universe.Check () the true sentences. 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

4、 passage with the words and expression in the municate environment none solar system universeIs 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. solar systemnoneenvironmentSpaceships from the earth have done surveys of

5、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 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 tha

6、t there has been life on the earth for hundreds of millions of years. 科学家认为地球上的生命已经有亿万年科学家认为地球上的生命已经有亿万年 了。了。millions of 数百万数百万 hundreds of 数百数百thousands of 成千上万成千上万 billions of 数十亿数十亿e.g. There are billions of stars in the Galaxy, and the sun is only one of them. 银河系中有数十亿颗恒星，太阳只是其银河系中有数十亿颗恒星，太阳只是其

7、中的一个。中的一个。2. However, we have not found life on any other planets yet.然而，我们还没有在任何其他行星上发然而，我们还没有在任何其他行星上发 现生命。现生命。yet用于否定句和疑问句，意思是用于否定句和疑问句，意思是“还，还，尚尚”。not yet的意思是的意思是“还没，尚还没，尚未未”，表示某事物在某一时间尚未发生，表示某事物在某一时间尚未发生，但未来也许会发生。例如：但未来也许会发生。例如：I havent learnt any farther information yet. 我还没有得到进一步的信息。我还没有得到进一步

8、的信息。Have you received her letter yet?你收到她的来信了吗？你收到她的来信了吗？3. The earth is a planet and it goes around the sun. Seven other planets also go around the sun.地球是颗行星，它围绕着太阳转。此外地球是颗行星，它围绕着太阳转。此外还有七颗行星也围绕着太阳转。还有七颗行星也围绕着太阳转。 太阳系的其他七颗行星：太阳系的其他七颗行星：水星水星 (Mercury)、金星、金星(Venus)、火星、火星 (Mars)、木星、木星(Jupiter)、土星、土星(

9、Saturn)、 天王星天王星(Uranus)、海王星、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.它们中没有一个有像地球这样的环境，因它们中没有一个有像地球这样的环境，因此科学家们认为在它们上面找不到生命。此科学家们认为在它们上面找不到生命。none of 表示（三个以上）一个也没表示（三个以上）一个也没 有。做主语时，谓语动词可用单数或复有。做主语时，谓语动词可用单数或复 数。数。e

10、.g. None of us has/have been to the Mars. 我们中没一个去过火星。我们中没一个去过火星。5. our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. 我们的太阳系只是一个由恒星和行我们的太阳系只是一个由恒星和行星组成的星系的一小部分，这个星系星组成的星系的一小部分，这个星系比太阳系大得多，称作银河系或银河。比太阳系大得多，称作银河系或银河。这里的这里的the Galaxy专指专指“银河

11、系银河系”，也，也可以称作可以称作 the Milky Way。而。而galaxy则泛则泛指指“星系星系”。e.g. Scientists have discovered a distant galaxy. 科学家们发现了一个遥远的星系。科学家们发现了一个遥远的星系。6. So how large is the universe? Its impossible to imagine.所以宇宙有多大？我们无从想象。所以宇宙有多大？我们无从想象。句型句型: It is + 形容词形容词 + to + 动词原形动词原形，意思是意思是“做某事很做某事很”。e.g. It is difficult to

12、 read these words. 读这些单词很难。读这些单词很难。7. With so many stars in the universe, are we alone, or is there life out there in space? 宇宙中有这么多星球，我们是孤独的宇宙中有这么多星球，我们是孤独的吗？或者太空中还有其他生命存在呢？吗？或者太空中还有其他生命存在呢？with + 名词名词 + 介词短语，表示伴随情介词短语，表示伴随情况，意思是况，意思是“带着带着”。 e.g. Mr. Zhang is coming with a book in his hands.张老师手里带着

13、一书进来了。张老师手里带着一书进来了。alone在句中作形容词，不作定语只做表在句中作形容词，不作定语只做表语，也可作副词。意思是语，也可作副词。意思是“独自地独自地”。e.g. She was alone in that dark room.她独自一人呆在那黑屋子里。她独自一人呆在那黑屋子里。 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 spaces

14、hips)They have just received a message from one of our spaceships.1. Where has the spaceship 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

15、 know how to send us a message.4. Why have the people on Mars not visited us on the earth? (do not know how to)We do not know how to visit us on the earth. 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 sp

16、aceship to Mars _1. Wheres Mr Green? He _ to Changsha. (2013湖南湘西湖南湘西) A. have been B. has gone C. has been2. Is Tom at home? No, he_ to town. (2013天津天津) 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安徽安徽) A. didnt arrive B. doesnt

17、 arrive C. isnt arriving D. hasnt arrived4. What is the weather like this summer here? There _ very little rain. (2011广州广州) A. has B. has been C. are D. have been5. A number of tourists _ Yangzhou many times because it is such a beautiful city. (2013扬州扬州) A. have been to B. has been to C. has gone to D. have gone to