初中英语Unit 2 We have not found life on any other planets yet示范课课件ppt

这是一份初中英语Unit 2 We have not found life on any other planets yet示范课课件ppt，共26页。PPT课件主要包含了small，planets，sent，discovered，impossible，hundreds，outside，However，enough，galaxies等内容，欢迎下载使用。

阅读Act.2课文，完成下列题目。
1.Life has been n the earth fr _____.A. hundreds f years B. millins f yearsC.hundreds f millins f years D.thusands f years2.Hw many planets g arund the sun?A.Seven B.Eight C.Nine sun and its planets are called Galaxy B.the slar system C.the Milky way D.the universe
4.Accrding t the passage, which f the fllwing is RIGHT?A.planet>star>slar system>galaxy>universeB.planetstar>galaxy>slar system>universeD.star根据Act.2课文完成下列短文填空。
Thugh scientists think that there has been life n the earth fr 1._________ f millins f years, we have nt fund life n any ther 2.________ in the slar system. Our slar system is a 3.______ part f the Galaxy. Scientists have als 4.___________ many ther galaxies 5.___ the universe. They are s far away that it is 6.___________ t imagine hw large the universe is. Scientists have 7._____ spaceships t the planet Mars and 8.________ the slar system. 9.________, n spaceship has travelled far 10._______ t reach ther stars ur Galaxy.
根据课文内容，完成下列思维导图
Tpic: 1.__________________Para. 1: We have nt fund life n any ther 2._______ yet.Para. 2: The 3._____________ and the Galaxy.Para. 3: There are many ther 4._________ in the universe.Para. 4: Scientists have even sent 5.___________ t travel utside the slar system.Para. 5: Scientists’ 6._________
Anyne ut there?
slar system
1.Scientists think that there has been life n the earth fr hundreds f millins f years.
①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.
②hundreds f意为“数以百计的；成百上千的”，后接可数名词复数，不与表示具体数字的数词连用。hundred与具体数字连用时，其后不加-s，不与f连用，表示确定的数目。
[拓展]与hundred的用法相似的词有thusand, millin, billin等。
eg: 我们学校如此有名以至于每学期都有许多人来参观它。Our schl is s famus that peple cme and visit it every year. 他的书已经被翻译成一百多种语言。His bks have been translated int mre than ne languages.
2.Nne f them has an envirnment like that f the earth.
nne作代词，意为“没有一个人，没有一个，一点儿也没有”，通常用于表示三者或三者以上的人或物中“没有一个”。
易混辨析：nne 与 n ne
1)nne既可指人也可指物，常与f连用。nne f后接可数名词复数或代词复数作主语时，谓语动词用单、复数均可；若其后接不可数名词作主语时，谓语动词用单数形式。
2)nne指数量上“一个也没有”，可用来回答hw many或hw much引导的疑问句；而n ne指的是“没有人”，只能回答wh引导的疑问句。
3.The sun and its planets are called the slar system.
本句中的are called是call的被动语态，意为“被称为”。一般现在时的被动语态的基本构成为“主语+am/is/are+及物动词的过去分词+其他”。
eg: 这个城市用水很多。
A great number f water is used in this city.
4.Our slar system is a small part f a much larger grup f stars and planets.
grup意为“组，群”，作可数名词，常构成短语a grup f，意为“一群”，其后只能接可数名词的复数。
用所给动词的适当形式填空①Lk! A grup f Americans 　 　　(visit)the Histry Museum nw. ②The pair f sunglasses 　　　(lk) cl. The sunglasses ____ (be) clurful. 
are visiting
lks are
5.It’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
6.Hwever, n spaceship has travelled far enugh t reach ther stars in ur Galaxy.
“adj./adv. + enugh t d sth.”意为“足够...做某事”，enugh是副词，不定式短语作状语。
[拓展]enugh 作副词，意为“足够地”，修饰形容词或副词时，放在形容词或副词之后。enugh作形容词，意为“充足的，足够的”，修饰名词时常位于名词的前面。
eg: Jack做作业不够细心。 你有足够时间做作业吗？
Jack didn’t d his hmewrk carefully enugh.
D yu have enugh time t d yur hmewrk?
7. Are we alne, r is there life ut there in space?
易混辨析：alne 与 lnely
alne意为“单独的(地)，独自的(地)”，可作形容词或副词，强调客观情况，侧重说明独自一人或一方，没有同伴或助手。
lnely意为“孤独的”，只能作形容词，强调主观感情，心里感到孤单，侧重主观感受。
8.Why has n ne cmmunicated with us?
cmmunicate with sb.为固定用法，意为“和某人交流”。
1.在地球上 2.成百上千3.绕着...转 没有一个5.太阳系 的一小部分7.数以亿计 8.在宇宙中9.拍照 10.在太空中11.与...交流12.它们中没有一个有类似地球的环境存在，所以科学家们认为人们在它们上面不会发现生命。
n the earth
a small part f
in the universe
cmmunicate with
Nne f them has an envirnment like that f the earth, s scientists d nt think they will find life n them.
13.在银河系中有数以亿计的恒星，我们的太阳系只是其中之一。14.它们很遥远，它们的光要经过很多年才能到达我们这儿。15.然而，还没有宇宙飞船飞行足够远的距离到达靠近我们银河系的其他恒星。
There are billins f stars in the Galaxy, and ur sun is nly ne f them.
They are very far away and their light has t travel fr many years t reach us.
Hwever, n spaceship has travelled far enugh t reach near ther stars in ur Galaxy.
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
8.There are ________ stars in the Galaxy. They are far frm f B.billins C.billins f D.billin
9.－I hear yu ________ the USA. When ________ yu g there? －Last summer been t; did B.have gne t; willC.have been t; d D.have gne; did
10.—Kids ften feel better in a happy family. —That’s true. A happy family prvides a lving _____ fr its children. A. expressin B. envirnment C. encuragement D. develpment
11.Kids have t take many afterschl classes. They _______ hard t study fr gd grades. [中考·江西]A. push B. are pushed C. are pushing D. have pushed
12.—Tw tickets fr Sunday, please! —Srry. There is _________ left. [中考·常州]A. nthing B. nne C. sme D. anything
13.In the past few years there _________ great changes in my hmetwn. [中考·天水]A. had been B. have been C. were D. are
utside fr n t like
1.They have been here _____ a few mnths.
2.Let’s send a message ____ Tm t tell t him this fd news.
3.This Sunday we’ll g ________ t have a picnic.
4.Have scientists discvered any life ____ ther planets?
5.We mustn’t talk t the elder ______ that. It’s nt plite.
用括号内所给单词的正确形式填空
1.Hw many __________(grup) are there in yur class?
2.—Hw many peple are there in yur cuntry? —It has reached 500 _______ ( millin ) .
3.He's much_________(yung) than Mr Wang.
4.Neptune(海王星）is ne f the_________ (planet)in the slarsystem.
5.There are tw bys_______（call） Jerry in Class 2
含think的主从复合句