外研版八年级下 Module 3 Unit 2 We have not found life on any other planets yet. 课件 (共63张PPT)

(共63张PPT)
Enjoy English
M3U2
We have not found life
on any other planets yet.
第2课时
CONTENT
04
03
02
01
Writing（写作）
Summary(总结)
Language points（语言点）
复习检测
05
课堂小测
学习目标
理解并背过本课中出现的重点短语、句子，并能根据提示词默写出来。
尝试用所学知识和现在完成时的句型，简单描述自己对太空的认识。
理解重点语法点并能根据理解，做对相关习题。
01
复习检测
一、根据汉语提示或所给词的适当形式填空。
I saw a __________(群) of children playing in the street.
2. We can use_________ (太阳的) energy to do many things today.
3. He found it _________(不可能的) to make her change her mind.
4. We learn a language in order to____________ (交流).
5. So far, people ______________ (discover) 100 million galaxies.
6.Most students study hard in order _______(enter) a good senior
high school.
group
solar
impossible
communicate
have discovered
to enter　
Read the passage again and answer the following questions.
1. Have we found any life on other planets
2. What is called solar system
No, we haven’t.
The Sun and its planets are called the solar system.
3. How many planets are there in solar system
4. Have we discovered other galaxies in the universe
5. Is there life out there in space
Nine.
Yes, we have.
We don’t know.
solar system
planets
the Sun
the Earth
Mars
To know about the solar system
二、根据思维导图，口头复述课文。
Anyone out there？
planets
solar system
galaxies
spaceships
questions
02
Language points
语言点
Paragraph1
Scientists think that there has been life on the earth for hundreds of millions of years.
01
However, we have not found life on any other planets
yet.
02
there have/has been 是there be 句型的现在完成时
there has been + 可数名词单数/ 不可数名词
there have been + 可数名词复数
1.Scientists think that there has been life on the earth for hundreds
of millions of years.
科学家们认为地球上存在生命已经有数亿年的时间了。
E.g. 在过去的几年里，我的家乡发生了巨大的变化。
There _______________________in my hometown in the past few years.
have been great changes
1 Scientists think that there has been life on the earth for hundreds of millions of years.
科学家们认为地球上的生命已经有上亿年的历史。
there be 的现在完成时______________________
There has been a picture on the wall for a long time.
There have been some old trees in our school.
eg:很长时间以来在墙壁上已经有这幅画了
在我们学校已经有一些古树了。
“there have/has been+名词”
Language points
hundreds of millions of 数亿，数以亿计
当表示具体数目时，hundred 后不加-s;当表示不确定的数目时，后面加-s, 并且跟of 连用。thousand, million, billion和hundred的用法相同。
G.g：There are eight hundred students in our school.
There are hundreds of people in the park.
Practice
We planted _____ trees last year.
A. hundreds of B. hundred of
C. five hundreds D. five hundred of
1. Scientists think that there has been life on the Earth for hundreds of millions of years.
以hundred为例
millions of 数百万 hundreds of 数百
thousands of 成千上万 billions of 数十亿
Language points
当表示具体数目时，用____________；当表示不确定的数目时，用___________。类似用法的词还有：________________。
eg：1.3 billion people 十三亿人；
thousands of houses 数以千计的房子
数词+hundred
hundreds of
hundred, thousand, million等
We planted _____ trees last year.
A. hundreds of B. hundred of
C. five hundreds D. five hundred of
Practise
2. However, we have not found life on any other planets
yet.然而，我们还没有在任何其他行星上发现生命。
知识点1：other意为“别的；其他的”，常与复数名词连用，表示没有明确的范围。
1. I don’t have any ( ) books except this one.
A. other B. another C. others D. the other
2. In our class, only Tom is English, ( )are Chinese.
A. others B. the other
C. the others D. another
3. He has two brothers. One is 10 years old , ( )
is 5 years old.
A. other B. another
C. others D. the other
A
C
D
4. Mary doesn't want to buy this skirt. Would you
please show her ( ) one
A. others B. the other
C. the others D. another
5. This coat is too large. Show me some ( ), please.
A. other B. another C. others D. the other
D
C
2. However, we have not found life on any other planets
yet.然而，我们还没有在任何其他行星上发现生命。
知识点2：yet 用于否定句和疑问句，现在完成时的标志词，意思是“还，尚”。not … 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。
E.g.（1）I haven’t learnt any further information yet.
我还没有得到进一步的信息。
（2）Have you received her letter yet 你收到她的来信了吗？
01
02
03
04
Paragraph2
The earth is a planet and it goes around the sun.
Seven other planets also go around the sun.
None of them has an environment like that of the earth, so scientists do not think they will find life on them.
Our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way.
1. The earth is a planet and it goes around the sun. Seven other planets also go around the sun.地球是一颗行星，它围绕太阳转。其他七颗行星也围绕太阳转。
go around “围绕······转”
E.g: 别担心。让我们四周转转, 找一找。
Don't worry. Let's just go around and look for it.
2.
e.g.我们中没一个人去过火星。
None of us has/have been to Mars.
2. None of them has an environment like that of the earth, so the scientists do not think they will find life on them. 他们当中没有一个有像地球一样的环境，所以科学家们认为他们不可能在其他星球上找到生命。
none pron.表示（三个或三个以上）一个也没有。
none of + 可数名词复数/ pron. + 谓(单/复)
none of + 不可数名词/pron. + 谓(单)
注意：none 与no one（nobody） 的区别：
none既可指人也可指物，通常与of 连用，也可单独使用；
no one(=nobody) 只能指人，不能与of 连用。
如：_______ of the reasons was true.
A. None B. No one C. All
(2) none与数量有关，可回答how many问句，表示“一个也没有”；而no one表示“什么人也没有”，可回答who问句。如：
-Who are you speaking to -_________.
-How many students are there in the room
-_________.
A
No one
None
【2013山东潍坊】28. I have two sisters, but ________ of them is a teacher.
A. all B. neither
C. both D. none
【解析】考查不定代词辨析。根据句意“我有两个姐姐，但是没有一个是老师。”
neither “两者都不”故选B。
________ of the reasons was true.
A. None C. Nothing B. No one D. All
B
A
2. None of them has an environment like that of the earth, so the scientists do not think they will find life on them. 他们当中没有一个有像地球一样的环境，所以科学家们认为他们不可能在其他星球上找到生命。
that是指示代词。为避免重复，可用 that 或 those 来代替前面已提到过的人或事物，that代指单数可数名词或不可数名词；those代指复数可数名词。
The streets in the city are wider and the buildings are taller than ________ in the county.
The population of Shanghai is much larger than ______ of Nanning.
those
that
3.The sun and its planets are called the solar system.
太阳和它的行星被叫做太阳系。
“be+动词的过去分词”构成被动语态
be called/named 被称作
4. Our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. 我们的太阳系是一个被称作银河系的大得多的恒星和行星群中的一小部分。
知识点1： a part of… ······的一部分
知识点2： a large group of… 一大群······
a group of + 可数名词
E.g: A group of people are visiting the Great Wall.
4. Our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. 我们的太阳系是一个被称作银河系的大得多的恒星和行星群中的一小部分。
知识点3：
called the Galaxy or the Milky Way为过去分词短语，在该句中作后置定语，修饰前面的group。它可转化为一个非限制性定语从句，即which is called the Galaxy or the Milky Way。
Paragraph3
They are very far away and their light has to travel for many years to reach us.
01
It is impossible to imagine.
02
1. They are very far away and their light has to travel for many years to reach us.他们很遥远，并且他们的光必须经过许多年才能到达我们这里。
知识点1：far away 遥远的
far away from… 离······远
知识点2：light用法
adj. “轻的；明亮的”
light v.“点亮；照亮”
n. 可数名词 “电灯”
不可数名词 “光线；灯光”
E.g: The moon is far away from the earth.
2. It is impossible to imagine. 难以想象。
It is + adj. + (for/ of sb) + to do sth
eg. 你能帮我真是太好了。
It's kind of you to help me.
运动对你有益。
It is good for you to do sports.
imagine v. 设想；想象
imagination n. 想象； 想象力
短语：imagine + doing 想象做某事
imagine + that 从句
E.g: She imagined walking into the office and telling
everyone what she thought of them.
她想象着自己走进办公室并告诉每个人她对他们有何看法。
Paragraph4
However, no spaceship has travelled far enough to reach other stars in our Galaxy.
01
1. However, no spaceship has travelled far enough to reach other stars in our Galaxy.然而， 没有宇宙飞船能遨游到足够远而到达银河系的其他恒星上。
其中不定式作结果状语
E.g. 这个房间足够大，能放下三张床。
The room is ___________________hold three beds.
他跑得足够快去赢得一等奖。
He runs ___________________ win the first prize.
他年龄不够，不能上学。
He is ____________________ go to school.
large enough to
fast enough to
not old enough to
adj. “足够的” 通常位于名词前，修饰名词 enough time
enough
用法 adv. “足够的” 修饰adj.或adv. 并且位于adj.或adv.后。
adj./ adv. + enough to do sth 足够…能做某事
not + adj./adv. + enough to do sth 不够…做某事
enough 遇到 adj. 或者adv. 要后置
知识点
(高频)enough/ 'n f/adv.充分地；足够地
enough作副词，修饰形容词或副词时放在被修饰词______。
eg：He is not old enough to join the army.
他年龄尚小，不能参军。
【重点】
4 However，no spaceship has travelled far enough to reach other stars in our Galaxy.
然而还没有任何航天器到达银河系里的其他恒星。
后面
The dining hall is________ to hold 300 people. (梅州)
A．enough big　　　 B．enough small
C．small enough D．big enough
典例
D
【点拨】此题用语法分析法， 句意为“这家餐厅足够大，能容纳300人”。副词enough修饰形容词，enough需后置，由题意可知答案。
All the students in the classroom do their homework ________．
A. enough careful B. careful enough
C. carefully enough D. enough carefully
C
【点拨】enough修饰形容词或副词时放在被修饰词后面，且副词carefully修饰动词do。
(1)“adj./adv.＋enough to do sth.”通常可以与“so＋adj./adv.＋that从句”进行句型转换。
(2)“not＋adj./adv.＋enough to do sth.”通常可以与“too...to do sth.”进行句型转换。
拓展
E.g: This boy is old enough to go to school.
= This boy is so old that he can go to school.
E.g: This boy isn’t old enough to go to school.
= This boy is too young to go to school.
1) He ran and ran, but he couldn’t run _____ to catch the bus.
A. fast enough B. enough quick
C. enough fast D. enough quickly
2) Mike is only 15 years old. He is not ______ to get a driver’s license.
A. old enough B. enough old
C. young enough D. enough young
A
A
【2013浙江杭州】24. She’s not strong enough _______walking up mountains.
A. to go B. going
C. go D. went
【解析】不定式to go做结果状语，由句意“她的年龄还没足够达到去爬山的地步”。be enough to do sth. 是固定句型，足够达到什么程度做某事。
A
Paragraph5
With so many stars in the universe, are we alone, or
is there life out there in space
01
Why has no one communicated with us
02
1.With so many stars in the universe, are we alone, or
is there life out there in space 宇宙中有这么多的星星，
我们是孤独的呢，还是太空中还有其他生命的存在呢？
with so many stars in the universe是介词短语，
作伴随状语。
E.g: (1)With so many things to do, we have no time to play.
要做的事情这么多，我们都没时间玩了。
(2)Mr Li came into the classroom, with a smile on his face.
李老师走进教室，脸上带着微笑。
2. Why has no one communicated with us 为什么没有人和我们交流？
communicate v.交流；联系；沟通 communication n. 交流；沟通
E.g. (1)当我们与他人交流时，微笑很重要。
Smile is important when we _________________ other people.
(2)When you feel nervous, you should communicate _______
your parents.
A. to B. at C. of D. with
communicate with sb. 和某人交流/ 沟通
communicate sth to sb. 向某人传递(信息)
communicate with
D_.
03
Writing
写作
Writing
Look at the picture from a science story for children and answer the questions.
What have the scientists just received
(a message from one of our spaceships)
They have just received a message from one of our spaceships.
1. Where has the spaceship landed (Mars)
It has landed on Mars.
2. What has the spaceship discovered (people on Mars)
It has discovered people on Mars.
3. Why have the people on Mars not sent us a message (do not know how to)
They do not know how to send us a message.
4. Why have the people on Mars not visited us on the earth (do not know how to)
They do not know how to visit us on the earth.
Write a passage to describe the picture. Use your answers to the questions to help you.
We have just received a message from our spaceship to Mars … __________________________________________________________________________________________________
__________________________________
We’ve just received a message from our spaceship to Mars. Our spaceship has discovered aliens(外星人) there.
They have never sent us a message because they don’t know how to communicate with us. They have not visited the earth because they don’t know how to fly to our planet, and they prefer life on Mars. They seem very happy on their planet. They have used technologies(技术) from other spaceships to make TVs, radios and so on.
We hope they will visit us and live happily with us one day!
Possible version:
04
Summary
总结
1. 在地球上
2. 数亿年
3. 在任何其它行星上
4. 围绕……转
5. 其它七颗行星
6. (……中)没有一个...
7. 被叫做/被称为……
8. ……的一小部分
9. 一大群……
10. 数十亿的星星
11. 在银河系中
12. 许多其它星系
13.在宇宙中
14.做某事是不可能的
15. 在太空里
16. 与……交流
17. 载人飞船
18. 某地已经有....
19. 足够远
1. on the earth/ on Earth
2. hundreds of millions of years
3. on any other planets
4. go/move/travel around
5. seven other planets
6. none of + n./pron. (三者或以上否定)
7. be called/named…
8. a small part of …
9. a large group of …
10. billions of stars
11. in the Galaxy / in the Milky Way
12. many other galaxies
13. in the universe
14.It's impossible to do sth.
15. in space
municate with sb.
17. a manned spaceship
18. There have/ has been ....
19. far enough
翻译并背诵本课重点句子
1.科学家们认为地球上存在生命已经有数亿年的历史了。
2.然而，我们还没有在其他行星上找到生命。
3.它们当中没有一个有像地球一样的环境，所以科学家们认为他们不可能在在其他星球上找到生命。
4. 太阳和它的行星被叫做太阳系，我们的太阳系是一个被称作银河系的大得多的恒星和行星群中的一小部分。
Scientists think that there has been life on the earth for hundreds of millions
of years.
However, we have not found life on any other planets yet.
None of them has an environment like that of the earth, so scientists do not think they will find life on them.
The sun and its planets are called the solar system, and our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way.
翻译并背诵本课重点句子
5.科学家们也已经在宇宙中发现了许多其他星系。
6.它们很遥远，并且它们的光必须经过许多年才能到达我们这里。
7.然而，没有宇宙飞船能遨游到足够远而到达到银河系的其他恒星上。
8. 科学家们一直问这些问题：宇宙中有这么多的星星，我们是孤独的呢，还是太空中还有其他生命存在呢？
Scientists have also discovered many other galaxies in the universe.
They are very far away and their light has to travel for many years to reach us.
However, no spaceship has travelled far enough to reach other stars in our Galaxy.
Scientists have always asked the questions: with so many stars in the universe, are we alone, or is there life out there in space
翻译并背诵本课重点句子
1.科学家们认为地球上存在生命已经有数亿年的历史了。
2.然而，我们还没有在其他行星上找到生命。
3.它们当中没有一个有像地球一样的环境，所以科学家们认为他们不可能在在其他星球上找到生命。
4. 太阳和它的行星被叫做太阳系，我们的太阳系是一个被称作银河系的大得多的恒星和行星群中的一小部分。
5.科学家们也已经在宇宙中发现了许多其他星系。
6.它们很遥远，并且它们的光必须经过许多年才能到达我们这里。
7.然而，没有宇宙飞船能遨游到足够远而到达到银河系的其他恒星上。
8. 科学家们一直问这些问题：宇宙中有这么多的星星，我们是孤独的呢，还是太空中还有其他生命存在呢？
05
课堂小测
单项选择。
(　　)1．—Can I swim in the river
— No way. Look at the sign.It says “No Swimming”．
(选出与画线部分意思相同或相近的选项)
A．It’s possible. B．No door.
C．It’s impossible. D．No problem.
点拨:　No way.不行，不可能。It’s possible.有可能；英语中没有 No door.这一说法，故排除B项；It’s impossible.不可能；
No problem.没问题。结合语境可知，C项为最佳选项。
C　
(　　)2. I ________ an invitation to the concert. I can’t wait to go.
A．receive B．will receive
C．was receiving D．have received
(　　)3. The Queqiao satellite (卫星) will form a ________ bridge
between controllers on Earth and the far side of the Moon.
A．contribution B．communication
C．celebration D．competition
点拨:　“鹊桥号”卫星将在地球控制中心与月球背面形成一座通信桥梁。communication 通信。
D　
B　
(　　)4．The little boy said，“I am old enough ________ good care
of myself.”
A．take B．taking
C．to take D. have taken
(　　)5．—Could I go swimming with my friends，dad
—No，it’s very dangerous for you kids ________ swimming
without adults.
A．go B．going
C．to go D．went
c
c
I hope some of you will become scientists and send spaceship with astronauts to the space one day.
So you should study hard now. And your dream will come true.
Homework
Revise the language points.
2. Recite the key phrases and key sentences.
Thank you!