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

这是一份初中英语外研版 (新标准)八年级下册Unit 2 We have not found life on any other planets yet图文课件ppt，共41页。PPT课件主要包含了Module 3，Unit 2，Quiz，Homework等内容，欢迎下载使用。
Jurney t space
We have nt fund life n any ther planets yet.
nne envirnment that slar
prn. 没有一人；没有 一个；一点儿也 没有 n. 环境 prn. 那；那个（指代 已被提及的事物） adj. 太阳的；与太阳有 关的
Wrds and expressins
system slar system grup galaxy universe
n. 系统；体系 星系；（尤指） 太阳系 n. 群；组 n. 星系 n. 宇宙
light impssible utcmmunicate
n. 光；光线；光亮adj. （事情）办不 到的，不可能的 adv. 在远方 v. 联系；交流
A. galaxyB. planet C. slar systemD. star E. universe
Match the wrds with the pictures.
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
Skimming t get general idea
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.
Scanning t get detailed infrmatin
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.
Careful reading t slve difficult pints
Language pints
1. 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，hundred要用复数形式，即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。
2. 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。
这里with s many stars in the universe是介词短语，在句中作状语。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
3. Why has n ne cmmunicated with us? 为什么没有人和我们联系呢？ We rang several times, but n ne answered. 我们按了几次铃，但没有人来开门。
n ne表示“没有人”，作主语时，谓语动词常用单数形式。如：
nne 指三个或三个以上的人或物中“没有一个”，其后常接“f + 名词 / 代词”，后面动词单复数形式均可。
Nne f us has / have been t Sanya. 我们都没去过三亚。
— I’m hungry. Is there any bread in the fridge?— _____, but we have cakes. Wuld yu like t have ne? A. Sme B. Much C. Nne D. Nthing
Cmplete the passage with the wrds and expressin in the bx.
cmmunicate envirnment nne slar system universe
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.
— They’ve just heard a message frm ne f ur spaceships.
— What have the scientists just received? (a message frm ne f ur spaceships)
Lk at the picture frm a acience stry fr children and answer the questins.
1. Where has the spaceship landed? (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)4. Why have the peple n Mars nt visited us n the earth? (d nt knw hw t)
Write a passage t describe the picture. Use yur answers t the questins in Activity 5 t help yu.
We have just received a message frm ur spaceship t Mars…
Pssible versin:
We’ve just received a message frm ur spaceship t Mars. Our spaceship has discvered aliens there. They have never sent us a message because they dn’t knw hw t cmmunicate with us. They have nt visited the earth because they dn’t knw hw t fly t ur planet, and they prefer life n Mars. They seem very happy n their planet. They have used parts frm the ther spaceships frm the earth t make TVs, radis, etc. We hpe they dn’t d the same with this ne!
hundreds f millins f… g arund nne f them in the universe far enugh cmmunicate with in space
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.
Nw 2 mins t test yur spelling.
Spelling Bee
1. English-Chinese slar system galaxy universe envirnment grup light ut2. Chinese-English 联系、交流 没有一个 （事情）办不到的，不可能的
When finished, exchange yur papers t see wh des the best.
注: wrd 文档点击此处链接
Ⅰ. 用方框中的单词的正确形式完成下列句子。 1. _____ f the students has been t Australia. 2. A: Hw much is yur new cat. B: It _____ me 150 yuan.
billin cst planet alne nne
3. A: D yu ften g nline, Zha Hui? B: N. I like t g nline when I am ______ at hme. 4. A: Hw many peple are there in China nw? B: It has reached 1.3 ______. 5. The by is nly five years ld, but he knws abut many _______.
Ⅱ. 用already, yet, just, ever或never完成下列句子。 1. I have ______ dne the heavy wrk and nw I feel very tired. 2. — Mary, have yu read any bks abut Mars? — N, I have ______ read a wrd abut it.
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.
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. _________________________________　　　　　　　　　　　　　　　
Search fr mre infrmatin abut universe.
Preview the use f present perfect tense.2. Preview the new wrds and expressins abut space.