外研版八年级下册英语同步教学课件-we have not found life on any other planets yet 30页

1.[nʌn] 2[ɪn'vaɪrənmənt] 3. [ðæt] 4. ['səʊlə(r)] 5. ['sɪstəm] 6. [ɡru:p] 7. ['ɡæləksɪ] 8. [ˈju:nɪvɜ:s] 9. [laɪt] 10. [ɪmˈpɒsəbl] 11. [aʊt] 12. [kə'mju:nɪkeɪt] none environment that solar system solar system group galaxy universe light impossible out communicate pron.没有一人 n.环境 pron.那，那个 adj.太阳的 n.系统，体系 星系，太阳系 n.群，组 n.星系 n.宇宙 n.光/光线/光亮 adj.不可能的 adv.在远方 v.联系，交流 The earth is a ______ and it __________ the sun. Scientists think that there has been life on the earth for ______________________ years. planet goes around hundreds of millions of However, have we found life on any other planets yet? The sun and its planets are called _____________ The earth is a ______ and it goes around the sun. _______ other planets go around the Sun. planet Seven the solar system 太阳系 the Galaxy / the Milky Way 银河系 There are _________ stars in the Milky Way.billions of Our solar system is a small part of ____________. 太阳系 the Milky Way = the Galaxy 银河系 It is __________ to imagine. 宇宙 galaxies impossible Scientists have discovered many other _________ in the universe. So how large is the universe? Scientists have sent ___________to the planet Mars to take photos. spaceships They have even sent spaceships __________ (travel) outside the solar system. to travel Look at the picture and talk about what you know about Chinese spaceships. Shenzhou-9 is a manned spaceship. Liu Yang Jing Haipeng Liu Wang 1. Anyone out there? 2. Life on the earth 3. The sun and other stars 4. The stars at night √ Read the passage and choose the best title for it. The 1st Para. Questions: 1.How long has there been life on the earth? 2.Have we found life on any other planets yet? There has been life on the earth for hundreds of millions of years. No, we haven’t. The 2&3rd Para. 2.Put the words and expressions from the smallest to the largest :_____________ A. galaxy B. planet C. solar system D. star E. universe B D C A E 1. Which is true? A: Seven planets go around the sun. B: there are only stars in the galaxy. C. The solar system is larger than the galaxy. D: the Environment of the earth is different from that other planet in the solar system.√ Spaceships have travelled to ____________ and_______________________. But not travelled _______________________yet, because it is too_______. The 4th Para. the planet Mars outside the solar system other stars in our Galaxy far The 5th Para. Have scientists discovered any life in outer space yet? No, not yet. Is there life out the solar system in space? We do not know the answers…yet. 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. Scientists have visited most of the universe. Check the true sentences: × √ √ √ × × 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. 在地球上 成百上千 数百万 亿万 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 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. 绕着转 它们中没有一个 be called 被叫做 太阳系 一小部分 一个大的多的星群 银河 几百亿 …之一 none of … 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数 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 harge is the universe? It is impossible to imagine. 在宇宙里 不得不 这简直无法想象 It is +adj for sb. to do sth. reach =arrive at/ in+地点=get to Scientists have sent spaceships 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 to reach other stars in our Galaxy. send sth to sp.发送…到 拍照片 太阳系 adj./ adv enough to do sth足 够做某事 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 there been visitors to the earth from other planets? Why has no one communicated with us? We do not know the answers…yet. with + 名词 + 介词短语，表示伴随情况，意思是“有……”。 在太空中 其他行星 没人 no one表示“没有人”，作主语时，谓语动词常用单数形式。 communicate with sb. 与…联系/交流 Spaceships 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 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 day. Complete the passage with the words and expression in the box. communicate environment none solar system universe 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. solar system none environment communicate universe 1.成百万年 2.在其它的行星上 3.绕太阳转 4.他们中没有人 5.被叫做 6.太阳系 7.一小部分 8.几十亿的星星 9.在宇宙中 10.许多其他的星系 11.距离好远 12.不得不，必须 13.足够远 14. 如此多 15.和某人联系 millions of years on any other planets go around the sun none of them be called the solar system a small part of billions of stars in the universe many other galaxies far away have/has to far enough so many communicate with sb. 1.This city ________(call) Hangzhou. 2. The boy is old enough _______(look) after himself 3. It is impossible _________ (finish ) work today. 4. None of them ______(come) from China. 5. China has ________(billion) of people. 6. The Sun ___________(not go )around the earth. 7. _____the Scientists _____(send) spaceship to the moon yet? 8. We sent the spaceship to planets __________( discover) life . 9. One of ___________(galaxy) is the milky galaxy. 10. China _______(send) spaceships tens of years ago. is called to look to finish comes billions doesn’t go Have sent to discover galaxies sent 注意：none 与no one（nobody） 的区别： (⑴)none既可指人也可指物，通常与表范围的of 短语连用； no one(=nobody)只能指人，不能与of 短语连用。 如：_________ of the reasons was true. A. None B. No one C. All (2) none与数量有关，可回答how many问句，表示“一个 也没有”；而no one表示“什么人也没有”，可回答who 问句。如： -Who are you speaking to?-_________. -How many students are there in the room? -_________. A No one None that是指示代词。为避免重复，可用 that 或 those 来 代替前面已提到过的人或事物； 1. The air in the countryside is fresher than _________in the city. 2. The streets in the city are wider and the buildings are taller than ________ in the county. 3. The environment is much cleaner than ________ in the city. that those that 2. However, no spaceship has traveled far enough to reach other stars in our Galaxy. 然而，没有一个航天器去到足 以到达我们银河系其他恒星那么远的地方。 …enough… to do adj./ adv. + enough + to do sth. 足够…，可以… not + adj./ adv. + enough + to do sth. 不够…，不可以… (1) 我们有足够的钱花。 We have ___________________________. (2) 他跑得够快，很快追上了我们。 He ran __________________ catch up with us soon. (3) 他年龄不够大，照顾不了自己。 He _______________________________________. enough money to spend fast enough to isn’t old enough to look after himself 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. 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. They do not know how to send us a message. They do not know how to visit us on the earth. 4. Why have the people on Mars not visited us on the earth? (do not know how to) Homework 1. Revise the language points of unit 2. 2. Recite the text. 3. Do exercises of M3U2 in your WB. 没有一人 环境 那，那个 太阳的 系统，体系 太阳系 群，组 星系 宇宙 光/光线/光亮 不可能的 在远方 联系，交流 none environment that solar system solar system group galaxy universe light impossible out communicate