外研版 (新标准)八年级下册Unit 2 We have not found life on any other planets yet图文ppt课件

这是一份外研版 (新标准)八年级下册Unit 2 We have not found life on any other planets yet图文ppt课件，共29页。PPT课件主要包含了planet，数以百万计的，Unit 2，the Sun，the Earth，Mars ，M3U2短文知识点，doesn’t go，galaxies，sent等内容，欢迎下载使用。
3. — Have yu ______ been t the Great Wall in China, Vicky? — Of curse, I have. 4. Dn’t wrry. We have _______ helped yu sweep the classrm. 5. — Have yu dne yur wrk _____? — Srry, but I will finish it in ne hur.
The earth is a ______ and it __________ the sun.
Scientists think that there has been life n the earth fr ______________________ years.
Lead inLead in
hundreds f millins f
Hwever, have we fund life n any ther planets yet?
Lk at the picture and talk abut what yu knw abut Chinese spaceships.Shenzhu-9 is a manned spaceship.
Wrk in pairsWrk in pairs
1. Anyne ut there?2. Life n Earth3. The sun and ther stars4. The stars at night
Read the passage and chse the best title fr it.
the slar system
200 billin stars
It’s a part f the universe(宇宙).
the Milky Waythe Milky Way
The 1st Para. Questins:
1.Hw lng has there been life n the earth? 2.Have we fund life n any ther planets yet?
There has been life n the earth fr hundreds f millins f years.
N, we haven’t.
1.What is called the slar system? What is it?2.Hw many planets are there in the slar system?3. Why dn’t scientists think they’ll find life n the ther planets?
The sun and its planets are called the slar system.
It is a small part f the Galaxy / the Milky Way.
The 2nd Para. Questins:
There are eight planets.
Because nne f them has an envirnment like that f the earth.
What have scientists discvered?2. Why is it impssible t imagine hw large the universe is?
They’ve discvered many ther galaxies in the universe.
Because they are very far away and their light has t travel fr many years t reach us.
The 3rd Para. Questins:
Scientists have ____________________ the planet Mars t ____________. They have even sent spaceships t ______________ the slar system. Hwever, n spaceship has travelled _______________________ ther stars in ur Galaxy.
The 4th Para.
sent spaceships t
travel utside
far enugh t reach
Check(√) the true sentences.1. The earth is a star.2. The sun is a star.3. There is mre than ne galaxy in the universe.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.
1.Scientists think that there has been life n the earth fr hundreds f millins f years.
含think的主从复合句
本句为含think的主从复合句，即“主语+think+宾语从句”。
[拓展]当主语是第一人称，谓语动词是think, believe, expect等，且宾语从句为否定句时，习惯上把否定词转移到前面的主句中，称为“否定前移”。
eg: 我认为她不擅长英语。
I dn’t think that she is gd at English.
Language pintsLanguage pints
2. Scientists think that there has been life n the earth fr hundreds f millins f years. 科学家们认为地球上的生命已经有上亿年的历史。
hundred前加基数词，表示“一百、二百、三百……”，hundred要用单数形式；hundred与f连用表示“数百”时，hundreds f
例如：There are eight hundred students in ur schl.There are hundreds f peple in the park.
We planted _____ trees last year. A. hundreds f B. hundred f C. five hundreds D. five hundred f
thusand, millin, billin和hundred的用法相同。
3. 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？抑或太空中还有其他生命存在呢？ With s many things t d, we have n time t play. 要做的事情这么多，我们都没时间玩了。
with s many stars in the universe是介词短语，作伴随状语。类似的例子还有：
The wman std there with her hands in the pckets.那个女士站在那里，手插在口袋里。
— Why d yu always sleep ______?— Because I’m afraid f the dark. A. by yurself B. with the dr pen C. with the windw pen D. with the light n
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.我们中没一个人去过火星。
Nne f us has/have been t Mars.
注意：nne 与n ne（nbdy） 的区别：nne既可指人也可指物，通常与表范围的f 短语连用；n ne(=nbdy)只能指人，不能与f 短语连用。如： Nne f us has / have been t Sanya. 我们都没去过三亚。
(2) nne与数量有关，可回答hw many问句，表示“一个也没有”；而n ne表示“什么人也没有”，可回答wh问句。如：
-Wh are yu speaking t?-_________.-Hw many students are there in the rm?-_________.
5. Hwever, n spaceship has traveled far enugh t reach ther stars in ur 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。 …enugh… t d adj./ adv. + enugh + t d sth. 足够…，可以… nt + adj./ adv. + enugh + t d 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 sn. (3) 他年龄不够大，照顾不了自己。 He _______________________________________.
enugh mney t spend
fast enugh t
isn’t ld enugh t lk after himself
66It’s impssible t imagine.
句中的it是形式主语,真正的主语是动词不定式“t imagine”。“It is+adj.+(fr sb.) t d sth.”意为“(对某人来说)做某事是……的”。
—Mari, yur mbile phne is ringing.—Wait a minute. It’s dangerus 　　us 　　it while crssing the street. A.fr; answering B.fr; t answerC.f; answer D.f; t answer
1.This city ________(call) Hangzhu.2. The by is ld enugh _______(lk) after himself3. It is impssible _________ (finish ) wrk tday.4. Nne f them ______(cme) frm China.5. China has ________(billin) f peple.
6. The Sun ___________(nt g )arund the earth.7. _____the Scientists _____(send) spaceship t the mn yet?8. We sent the spaceship t planets __________( discver) life .9. One f __________(galaxy) is the milky galaxy.10. China _______(send) spaceships tens f years ag.
Have sent
1.The earth_____ a planet and it_____ arund the sun. A.are；g B.was；went C.is；g D.is；ges
2.There has been life_____ the earth fr hundreds f millins f years. A.in B.n C.f D.at
3.He prmised t pick me up at the schl gate.Hwever, he_____ ’t arrive B.desn’t arrive C.isn’t arriving D.hasn’t arrived
4.Why has n ne cmmunicated _______ us?A.with B.t C.fr D.at
6.I tried many ways, but _____ f them wrked. A.all B.bth C.neither D.nne
7.—I’ll be away fr a lng time. —Dn’t wrry.She can lk after yur pet _____ . A.careful enugh B.enugh carefulC.carefully enugh D.enugh carefully
5.It is said that the disease has killed mre than ____ peple hundreds B.tw hundreds’ C.tw hundred’s D.tw hundred
Ⅲ. 下列各句中均有一处错误，请指出并改正。 1. My mther isn’t in. She has been t the supermarket. _________________________________　　　　　　　　　　　　　　　　 2. Ftball is s exciting that millin f peple in the wrld play it. _________________________________　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 3. That is very hard t reach the apples n the tree. _________________________________　　　　　　　　　　　　　　　
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
millins f years n any ther planetsg arund the sunnne f thembe calledthe slar systema small part fbillins f starsin the universemany ther galaxiesfar awayhave/has tfar enughs manycmmunicate with sb.
Thank yu!Thank yu!