1、学习目标学习目标1.熟记重点单词：熟记重点单词：none,environment,solar,system,group,galaxy,universe,light,impossible,out,communicate2.掌握重点短语掌握重点短语:hundreds of millions of solar system,in the universe,far enough,in space,go around the sun,be called,have to,communicate with3.掌握重点句型：掌握重点句型：(现在完成时现在完成时)主语主语+have/has+动词的过去分词动词的
2、过去分词Do you know the words and expressions in the box?Put them in order:small large.galaxy planet solar system star universeplanet star solar system galaxy universeA.galaxyB.planet C.solar systemD.star E.universe Match the words with the pictures.ABCDEBSkimming(略读略读)to get general idea1.Anyone out th
3、ere?2.Life on Earth3.The sun and other stars4.The stars at nightRead the passage and choose the best title for it.Scanning（跳读）（跳读）to get detailed informationCheck()the true sentences.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
4、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.Careful reading（精读）（精读）to solve difficult pointsgo around the sun 绕太阳转be called 被叫作solar system 太阳系have to 不得不communicate with 与交流,与联系far eno
5、ugh 足够远in the universe 在宇宙中 in space 在太空中在太空中 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科学家们认为地球上的生命已经有上亿年的历史。的历史。there be 的现在完成时的现在完成时“there have/has been+名词名词”There has been a picture on the wall for a long time.There have been some
6、old trees in our school.eg:很长时间以来在墙壁上已经有这幅画了很长时间以来在墙壁上已经有这幅画了在我们学校已经有一些古树了。在我们学校已经有一些古树了。hundred前加前加基数词基数词，表示，表示“一百、二百、一百、二百、三百三百”，hundred要用要用单数形式单数形式；hundred与与of连用表示连用表示“数百数百”时，时，hundred要用复数形式，即要用复数形式，即hundreds of。例如：例如：thousand,million,billion和和hundred的用的用法相同。法相同。There are eight hundred students i
7、n our school.There are hundreds of people in the park.We planted _ trees last year.A.hundreds of B.hundred of C.five hundreds D.five hundred ofPractiseWith 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？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？抑或太空中还有其他生命存在呢
8、？要做的事情这么多，我们都没时间玩了。要做的事情这么多，我们都没时间玩了。这里这里with so many stars in the universe是是介词短语，在句中介词短语，在句中作状语作状语。类似的例子。类似的例子还有：还有：With so many things to do,we have no time to play.那个女士站在那里，手插在口袋里。那个女士站在那里，手插在口袋里。Practise Why do you always sleep _?Because Im afraid of the dark.A.by yourself B.with the door open C
9、.with the window open D.with the light on The woman stood there with her hands in the pockets.alone:独自，单独一人（没有感情独自，单独一人（没有感情色彩色彩)lonely:孤单的，孤独的（指情感上孤单的，孤独的（指情感上的孤独）的孤独）她独自一人回家她独自一人回家She went home alone.有时，我会感到孤独。有时，我会感到孤独。Sometimes,I feel lonely.practiceHe lives _,but he never feels_.A.lonely;alone
10、B.lonely;lonely C.alone;lonely D.alone;alone3.Why has no one communicated with us?为什么没有人和我们联系呢？为什么没有人和我们联系呢？We rang several times,but no one answered.我们按了几次铃，但没有人来开门。我们按了几次铃，但没有人来开门。no one表示表示“没有人没有人”，作主语时，作主语时，谓语谓语动词常用单数形式动词常用单数形式。如：。如：none 指指三个或三个以上的人或物中三个或三个以上的人或物中“没没有一个有一个”，其后常接，其后常接“of+名词名词/代词代
11、词”，后面后面动词单复数形式均可动词单复数形式均可。None of us has/have been to Sanya.我们都没去过三亚。我们都没去过三亚。Im hungry.Is there any bread in the fridge?_,but we have cakes.Would you like to have one?A.Some B.Much C.None D.NothingPractisenone,environment，solar,systemgroup,galaxyuniverse,light impossible,outcommunicate本课时主要单词本课时主要单
12、词hundreds of millions ofin the universe far enoughin space go around the sun be called have to communicate with本课时主要短语本课时主要短语1.However,we have not found life on any other planets yet.2.None of them has an environment like that of the earth.3.Scientists have also discovered many other galaxies in the
13、 universe.4.We do not know the answers yet.本课时主要句型本课时主要句型现在完成时态现在完成时态1Scientists 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 worki
14、ng hard in order to send astronauts to Mars one day.1.Scientists think that 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 Gala
15、xy,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 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
16、：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。4.None of them has a
17、n 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.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
18、.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.Scienti
19、sts 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 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
20、 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，表示伴随情况，介词短语，表示伴随情况，意思是意思是“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.
21、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。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.did
22、nt arrive B.doesnt 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 toFinish 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 _
