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教案配套ppt课件

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教案配套ppt课件，共45页。PPT课件主要包含了天王星，海王星，universe ，the sun ，the earth ，none，hundred，none  ，impossible，was alone等内容，欢迎下载使用。
Unit 2We have nt fund lifen any ther planets yet.
T understand the passage abut space travel invlving present perfect tense.T learn sme key wrds and useful expressins. 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.
Wrds: nne, envirnment, grup, universe, light, impssible, ut, cmmunicate
Phrases:hundreds/millins f, any ther planets, g arund,slar system, in the universe
Patterns:We have just dne 0…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.
Enjy a vide abut the unfrgettable mment f Shenzhu-9.
A Lng March-5 rcket, carrying the Chang'e-5 spacecraft, blasted ff frm the Wenchang Spacecraft Launch Site n the cast f China's suthern island prvince f Hainan. It is the cuntry's first attempt t retrieve samples frm an extraterrestrial bdy.Watch the vide.
When yu read a passage with a title and pictures, think abut the wrds yu may find in the passage, and the questins yu may want t ask befre yu start t read.
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
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.
slar system
Watch the flash and fill in the blanks.
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.
Lk at the picture frm a science stry fr children 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)
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.
3. Why have the peple n Mars nt sent us a message? (d nt knw hw t)
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.
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。 【拓展】 millins f 数百万 hundreds f 数以百计 thusands f 成千上万 billins f 数十亿
Ntes：hundred, thusand, millin, billin四词若是前面有具体的数词修饰时，则用单数形式；若是后面有介词f时，则用复数形式。
e.g. There are ______________ in the Galaxy, and the sun is nly ne f them. 银河系中有数十亿颗恒星，太阳只是其中的一个。 That cmpany has five ___________ wrkers in ttal. 那个工厂总共有五百位员工。
billins f stars
2. Nne f them has an envirnment like that f the earth, s scientists d nt think they will find life n them. 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。nne prn. 没有一个；没有一人。既可指人也可指物。nne f与不可数名词连用作主语时，谓语动词用单数；nne f 与复数名词、代词或单数集合名词连用时，谓语动词用单数或复数均可。 all与nne意思相反，每个，全体，指三者或三者以上的人或物。
【语境应用】Ⅰ. 单项选择。—I tried several ways t wrk ut the math prblem, but ________ f  them wrked.—Never give up. I believe yu’ll make it.A. all        B. each        C. nne        D. neither  Ⅱ. 词汇运用。—Tickets fr tday?—Srry, we’ve gt            left, but we have a few fr tmrrw.
Ⅲ. 完成句子。1) 他们三个都很忙。 They three ________ ________ very busy.2) 这些学生没有一个人有电脑。 ________ ________ the students ________ a cmputer.3) 这笔钱没有一点是我的。 ________ ________ the mney ________ mine.
are all
Nne f has/have
Nne f is
envirnment n. 环境the envirnment 自然环境，生态环境prtect the envirnment 保护环境【语境运用】根据首字母，填入恰当词汇。—The air pllutin is still terrible in Nrth China. —It will be even wrse if we dn’t take actin t prtect the e____________ arund us.
3. … and 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。
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。
4. S hw large is the universe? It’s impssible t imagine. 所以宇宙有多大？我们无从想象。
impssible adj. (事情)办不到的，不可能的。反义词pssible。It is+adj.+t+动词原形：做某事很……。e.g. __________________ these wrds. 读这些单词很难。 It is _________ (pssible) t build anther museum in such a shrt time. 
It is difficult t read
5. …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：带着……，表伴随。
e.g. Mr. Zhang is cming ___________ in his hand. 张老师手里拿着一本书进来了。
alne adj./adv. 独自一人的；单独一人的强调客观上的一个人，不表示内心的感受。e.g. She ___________ in that dark rm. 她独自一人呆在那黑屋子里。
6. Why has n ne cmmunicated with us?为什么没人和我们联系？
n ne没有人，多指人。当它用作主语时，谓语动词要用单数形式。 e.g. N ne _____________ me. 没人能够理解我。
understands
nne可用来回答hw many或hw much的提问，n ne可用来回答wh的提问。e.g. ①—Hw many birds can yu see in the picture? —_______. ② —Wh is in the rm? —________.
【语境应用】根据汉语意思完成英语句子。1) Mary经常与她的老师们交流。 Mary ften _________________ her teachers.2) 在他的帮助下，我试着向父母表达了我的感觉。 With his help, I tried t _____________ my feelings t ur parents.3) 你应该尽可能多地与你的父母交流。 Yu shuld ___________________________ as much as pssible.
cmmunicates with
cmmunicate with yur parents
Ⅰ. 根据语境及所给汉语提示语写出所缺单词。1. There are six ________(组) in ur English club. 2. Mrs Black is gd at _____________(交流) with children.3. ________(光) travels faster than sund.4. We shuld try t prtect the ___________(环境) f ur city.5. In the Middle Ages, sme peple thught the earth was the centre f the ________(宇宙).
cmmunicating
Ⅱ. 根据语境从方框中选择恰当的单词填空。
1. The earth is a small part f the ________.2. My uncle wrks ________ in America. He can’t cme t my birthday party. 3. It is _________ fr me t be there befre eight. It’s five t eight already. 4. The ld man has three sns, but ________ f them lives with him. 5. The ppulatin f America is smaller than ________ f India.
Ⅲ. 根据语境从方框中选择恰当的短语填空。
1. There are ____________ stars in ur galaxy. 2. We haven’t fund that bk in ____________ bkshp. 3. In the ____________, there are a lt f planets. 4. The Blacks decided t ____________ the wrld next year.5. That small twn is t ____________. Let’s take a taxi t g there.
Ⅳ. 根据汉语意思完成英语句子。1. 这个自然公园有多大？ ________ ________ is this nature park?2. 几百名科学家现身动物研究中心。 ________ ________ ________ appeared at the animal research center. 3. 教室里已经有学生了。 ________ ________ ________ students in the classrm.4. 我仅给他们其中一人照了相。 I nly ________ ________ f ne f them.
Hw large
Hundreds f scientists
There have been
tk phts
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…