2020-2021学年Unit 2 We have not found life on any other planets yet多媒体教学课件ppt

这是一份2020-2021学年Unit 2 We have not found life on any other planets yet多媒体教学课件ppt，文件包含Unit2ppt、Unit2--学案doc、Unit2--教案doc、Unit2--练习doc、m3u2a2swf等5份课件配套教学资源，其中PPT共44页， 欢迎下载使用。
1. T understand the passage abut space travel invlving present perfect tense2. T learn sme key wrds and useful expressins 3. T learn t use the fllwing patterns: We have just received a message. We haven’t fund life n any ther planets yet. Astrnauts have already been t the mn.
Learning bjective
Wrds: ther, prefer, als, nne, alne, system, cmmunicate, envirnment
Phrases:hundreds/millins f any ther planets g arundslar system in the universe
Patterns:We have just dne…We haven’t dne…yet.We have already dne...
D yu knw the wrds and expressins in the bx? Put them in rder: small-large.
galaxy planet slar system star universe
planet— star —slar system — galaxy— universe
Hw much d yu knw abut the slar system?Hw many planets are there in the slar system? D yu knw hw t say their names in English?
Lk at the picture and talk abut what yu knw abut Chinese spaceships.
Listen and read
T get general idea
Read the passage and chse the best title fr it. 1. Anyne ut there? 2. Life n the earth 3. The sun and ther stars 4. The stars at night
T get detailed infrmatin
1. The earth is a star. 2. The sun is a star.3. There is mre than ne galaxy in the universe.
Check (√) the true sentences.
4. The light frm the stars in ther galaxies has travelled fr a lng time t reach us.5. Scientists have received many messages frm space.6. Spaceships have visited mst f the universe.
请仔细阅读课文，然后完成下面的思维导图，每空词数不限。
slar system
Cmplete the passage with the wrds and expressin in the bx.
Is there life n ther planets? There are seven ther planets in ur (1) ____________, but (2) ______ f them has a(n) (3) ____________ like that f the earth.
slar system
Spaceships frm the earth have dne surveys f the ther planets, but they have nt fund any life there. Why has n ne frm ther planets tried t (4) ___________ with us? It is true that scientists have nt discvered life n ther planets in the (5) _________ yet, but sme scientists believe that they will find it sme day.
1. Scientists think that there has been life n the Earth fr hundreds f millins f years. 科学家认为地球上的生命已经有亿万年 了。millins f 数百万 hundreds f 数百thusands f 成千上万 billins f 数十亿
Language pints
e.g. There are billins f stars in the Galaxy, and ur sun is nly ne f them.银河系中有数十亿颗恒星，我们的太阳只是其中的一个。2. Hwever, we have nt fund life n any ther planets yet.然而，我们还没有在任何其他行星上发现生命。
yet 用于否定句和疑问句，意思是“还，尚”。nt … yet 的意思是“还没，尚未”，表示某事物在某一时间尚未发生，但未来也许会发生。例如：I haven’t learnt any farther infrmatin yet. 我还没有得到进一步的信息。Have yu received her letter yet?你收到她的来信了吗？
3. The Earth is a planet and it ges arund the sun. Seven ther planets als g arund the sun.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。 太阳系的其他七颗行星：水星(Mercury)、金星(Venus)、火星(Mars)、木星(Jupiter)、土星(Saturn)、天王星(Uranus)、海王星(Neptune)。
4. Nne f them has an envirnment like that f the earth, s scientists d nt think they will find life n 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。nne f … 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。
e.g. Nne f us has/have been t the Mars. 我们中没一个去过火星。5. … ur slar system is a small part f a much larger grup f stars and planets, called the Galaxy r the Milky Way. 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，这个星系比太阳系大得多，称作银河系或银河。
这里的the Galaxy专指“银河系”，也可以称作 the Milky Way。而galaxy则泛指“星系”。e.g. Scientists have discvered a distant galaxy.科学家们发现了一个遥远的星系。
6. S hw large is the universe? It’s impssible t imagine.所以宇宙有多大？我们无从想象。
句型: It is + 形容词 + t + 动词原形，意思是“做某事很……”e.g. It is difficult t read these wrds. 读这些单词很难。
7. With s many stars in the universe, are we alne, r is there life ut there in space? 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？
with + 名词 + 介词短语，表示伴随情况，意思是“带着……”。
e.g. Mr. Zhang is cming with a bk in his hands.张老师手里带着一书进来了。alne 在句中作形容词，不作定语只做表语，也可作副词。意思是“独自地”。e.g. She was alne in that dark rm.她独自一人呆在那黑屋子里。
5. Lk at the picture frm a science stry fr children and answer the questins.
Lk and answer the questins.
What have the scientists just received?(a message frm ne f ur spaceships)They have just received a message frm ne f ur spaceships.1. Where has the spaceship landed? (Mars)
It has landed n Mars.
2. What has the spaceship discvered? (peple n Mars)3. Why have the peple n Mars nt sent us a message? (d nt knw hw t)
It has discvered peple n Mars.They d nt knw hw t send us a message.
4. Why have the peple n Mars nt visited us n the earth? (d nt knw hw t)
They d nt knw hw t visit us n the earth.
millins f                      数百万的 g arund ...                   围绕……转be called                         被称作a grup f                       一群ne f ...                          ……其中之一billins f                        数十亿的take phts                     拍照  s many                          如此多cmmunicate with sb.   与某人联系
1. Hwever, we have nt fund life n any ther planets yet.2. Nne f them has an envirnment like that f the earth.3. Scientists have als discvered many ther galaxies in the universe. 4. We d nt knw the answers yet.
Ⅰ. 根据句意用括号内所给单词的适当形式填空。1. I think the ________ (light) is dark in the rm. 2. The tw ________ (grup) f students have t wear yellw clthes.3. The wrk is difficult s I think it’s __________ (pssible) t finish it in an hur.
4. When Alan is free, he always _____________ (cmmunicate) with his grandparents. 5. I hear scientists have fund tw new ________ (galaxy).
cmmunicates
Ⅱ. 根据语境从方框中选择恰当的单词填空。
nne, that, universe, envirnment, ut
1. The ppulatin f Australia is much smaller than ________ f China.2. Sme scientists believe there’s life ________ there in space.3. —Can yu speak French, bys? —Srry, ________ f us can speak French.
4. N ne knws hw many stars there are in the ________.5. We need mre trees. They’re gd fr ur ___________.
Ⅲ. 根据语境从方框中选择恰当的短语填空， 有的需要变换形式。
slar system, millins f, far away, g arund, be called
1. Wang Jie is nt ld but he ____________ La Wang in his ffice.2. Let’s ____________ the city, nt thrugh it.3. —The bkstre is ____________ frm ur schl. —I knw. S let’s g there by bus.
4. The ____________ is nly a small part f the Milky Way.5. Every year ____________ freign visitrs cme t my hme twn n hliday.
Ⅳ. 根据汉语意思完成英语句子，每空一词。1. 欧洲有很多国家，德国只是其中之一。 There are many cuntries in Eurpe. Germany is nly ________ ________ them. 2. 天空中有那么多风筝。 There are ________ ________ kites in the sky. 3. 你的学校有多大？ ________ ________ is yur schl?
ne f
s many
Hw large
4. 难以想象这条河有多长。 ________ ________ hard ________ ________ hw lng this river is.5. 他跑得足够快，能战胜任何人。 He runs fast ________ ________ beat anyne.
It is t imagine
enugh t