八年级英语下册module3journeytospaceunit2wehavenotfoundlifeonanyotherplanetsyet课件（新版）外研版

Unit 2 We have not found life on any other planets yet.,Module 3 Journey to space,目录,contents,课前预习,课堂导学,课文理解,课堂小测,课后作业,课前预习,目录,contents,课堂导学,目录,contents,1.Scientists think that there has been life on the earth for hundreds of millions of years. 科学家们认为地球上的生命已经有上亿年的历史。 hundred 与具体数字连用, 不加“s”，如: two hundred 二百；hundreds of 不与具体数字连用。 拓展： thousand(千), million(百万), billion(亿)和hundred的用法相同。 hundreds of 数以百计的；thousands of 数以千计的；millions of 数以百万计的；billions of 数以亿计的, 数十亿的,【学以致用】 ( )There are_ people in the zoo on Childrens Day. A.one hundreds B.two hundreds of C.hundreds of D.hundred of 2.None of them has an environment like that of the earth, so scientists do not think they will find life on them.他们中没有一个有像地球这样的环境，因此科学家们认为在他们上面找不到生命。,C,none用于表示对三者或三者以上全部否定的不定代词，既可指人，也可指物。作主语时，谓语动词可以是单数，也可以是复数; none的反义词是all,none可与 of 连用; 可以用来回答how many 或 how much开头的问句。 no one同义词为 nobody, 只用于指人，其后不跟of短语，作主语时谓语动词用单数，no one 只能回答以who开头的问句。 【学以致用】 (1)None of us_ been to Mars.我们中没一个去过火星。,has/have,(2)No one_ discovered any life in space yet.还没有人发现太空里的任何生命。 (3)Who are you speaking to? _(没人). (4)How many students are there in the room? _(一个也没有). 3.However, no spaceship has travelled far enough to reach other stars in our Galaxy.然而, 还没有宇宙飞船飞行足够远的距离到达我们银河系的其他恒星。,has,No one,None,enough 修饰形容词或副词时要位于所修饰的词之后,常用结构为 “ adj./adv. + enough + to do”。如： My sister is old enough to go to school.我妹妹的年纪足够大，可以去上学了。 【学以致用】 ( )Shes not strong enough_ walking up mountains. A.to go B.going C.go D.went,A,4.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，我们是孤独的吗？抑或太空中还有其他生命存在呢？ with so many stars in the universe是with引导的介词短语，在句中作状语。如： With so many things to do, we have no time to play.要做的事情这么多，我们都没时间玩了。 The woman stood there _. 那位女士站在那里，手插在口袋里。,with her hands in the pockets,课文理解,目录,contents,一、根据课文内容，完成下列思维导图，然后口头复述课文。,Anyone out there?,.planets,solar system,galaxies,travel outside the solar system,questions,二、请认真阅读课本Act.2短文，完成下列题目。 ( )1.How long has life been on the earth? A.Hundreds of years. B.Millions of years. C.Hundreds of millions of years. D.Thousands of years. ( )2.How many planets does the sun have? A.Seven B.Eight C.Nine D.Ten. ( )3.The sun and its planets are called_. A.Galaxy B.the solar system C.Milky Way D.the universe,C,B,B,( )4.According the passage, which of the following is right? A.planetstarsolar systemgalaxyuniverse B.planetstargalaxysolar systemuniverse D.starplanetsolar systemgalaxyuniverse ( )5.Which is the best title for this passage? A.Anyone out there? B.Life on the earth. C.The sun and other stars. D.The stars at night.,B,A,三、请根据课本Act.2短文，完成下列短文填空。 Though scientists think that there has been life on the earth for 1._of millions of years, we have not found life on any other 2._in the solar system.Our solar system is a 3._part of the Galaxy.Scientists have also 4._ many other galaxies 5._the universe.They are so far away that it is 6._ niverse is.,hundreds,planets,small,discovered,in,impossible,Scientists have 7._spaceships to the planet Mars and 8._the solar system.However, no spaceship has travelled far 9._to reach other stars in our Galaxy.,sent,outside,enough,课堂小测,目录,contents,4,一、根据中文意思或首字母提示，用单词的适当形式填空。 1.Scientists have discovered many other p_in the universe. 2.Taiwan is a p_of China for ever. 3.L_travels much faster than sound. 4.We cant live without a_ . 5.We need a quiet _ (环境) to study for a coming exam. 6.I think every child should _ (交流) with his parents.,lanets,art,ight,ir,environment,communicate,二、单项填空。 ( )1.The earth_ a planet and it_ around the sun. A.are；go B.was；went C.is；go D.is；goes ( )2.There has been life_ the earth for hundreds of millions of years. A.in B.on C.of D.at ( )3.He promised to pick me up at the school gate.However, he_ yet. A.didnt arrive B.doesnt arrive C.isnt arriving D.hasnt arrived,D,B,D,( )4.Why has no one communicated_ us? A.with B.to C.for D.at ( )5.It is said that the disease has killed more than_ people worldwide. A.two hundreds B.two hundreds C.two hundreds D.two hundred,A,D,三、根据句意和汉语提示完成句子。 1.地球是一颗行星，它围绕着太阳转动。 The earth is a _and it _ the sun. 2.其他七大行星也围绕太阳转动。 _ also go around the sun. 3.科学家们已经在宇宙中发现了许多其他的星系。 Scientists have _ galaxies in the _ .,planet,goes around,Seven other planets,discovered many other,universe,4.太阳系是我们整个星系的一小部分。 The solar system is _ our galaxy. 5.他到上学的年龄了。 He is _ to school.,a small part of,old enough to go,课后作业,目录,contents,5,一、单项填空。 ( )1._ Chinese are looking for ways to learn English well. A.Thousand B.Thousands C.Thousand of D.Thousands of ( )2.This movie wasnt_.He fell asleep half way through it. A.interesting enough B.enough interesting C.interested enough D.enough interested ( )3.The spaceship_ will go around the earth in 2005 will be called Shenzhou . A.which B.who C.whom D.what,D,A,A,( )4.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 ( )5.Why do you always sleep_? Because Im afraid of the dark. A.by yourself B.with the door open C.with the window open D.with the light on,B,D,二、句型转换。 1.I have been to America before.(变为一般疑问句) _ 2.have, finished, not, I, homework, my(连词成句) _ 3.She _ the Great Wall twice.(选 has gone to/has been to 填空),Have you been to America before?,I have not finished my homework.,has been to,4.So far, I learned more than 1,000 new words.(改错) _ 5.I think he will come to your birthday party.(改为否定句) I _come to your birthday party.,So far, I have learned more than 1,000 new words.,dont think he will,三、根据句意和汉语提示完成句子。 1.为什么不把书带回来？ _the book? 2.没有一个学生去过英国。 _ the students _England. 3.完成今天的作业不容易。 _ todays homework.,Why not bring back,None of,has been to,Its hard to finish,4.我刚读过有关火星的书。 I _ books _Mars. 5.从其他星系到我们这里要花费很多年。 It _many years_ us from other galaxies.,have just read,about,takes,to reach,四、拓展阅读。 Venus(金星) is only a little smaller than the earth, about 95% of the earths diameter(直径) and 80% of the earths mass(质量).The word Venus means the goddess of love and beauty in Greek.We name the planet so probably because it is one of the brightest planets we have known by now.We human beings have known Venus for a long time.It is the brightest thing in the sky except the sun and the moon.,Venus reaches its maximum(最大的) brightness shortly before sunrise or shortly after sunset, and is often thought as the Morning Star or as the Evening Star.A lot of observation of Venus was important to Copernicuss Heliocentric Theory(日心说) of the solar system.In 1962 scientists sent the first spacecraft(宇宙飞船) to explore Venus.So far there have been more than 20 and we will know more about Ve