外研版八年级下Module 3 Journey to space Unit 2 We have not found life on any other planets yet课件（29张PPT）

(共29张PPT)
用already, yet, just, ever或never完成下列句子。
1. I have ______ done the heavy work
and now I feel very tired.
2. — Mary, have you read any books about Mars
— No, I have ______ read a word
about it.
just
never
3. — Have you ______ been to the Great Wall in China, Vicky
— Of course, I have.
4. Don’t worry. We have _______ helped you sweep the classroom.
5. — Have you done your work _____
— Sorry, but I will finish it in one hour.
ever
already
yet
The earth is a ______ and it __________ the sun.
Scientists think that there has been life on the earth for ______________________ years.
Lead inLead in
planet
goes around
hundreds of millions of
数以百万计的
However, have we found life on any other planets yet
Unit 2
Look at the picture and talk about what you know about Chinese spaceships.
Shenzhou-9 is a manned spaceship.
Work in pairsWork in pairs
1. Anyone out there
2. Life on Earth
3. The sun and other stars
4. The stars at night
Read the passage and choose the best title for it.
planets
the Sun
the Earth
Mars
the solar system
行星
200 billion stars
It’s a part of the universe(宇宙).
the Milky Waythe Milky Way
The 1st Para. Questions:
1.How long has there been life on the earth
2.Have we found life on any other planets yet
There has been life on the earth for hundreds of millions of years.
No, we haven’t.
1.What is called the solar system What is it
2.How many planets are there in the solar system
3. Why don’t scientists think they’ll find life on the other planets
The sun and its planets are called the solar system.
It is a small part of the Galaxy / the Milky Way.
The 2nd Para. Questions:
There are eight planets.
Because none of them has an environment like that of the earth.
What have scientists discovered
2. Why is it impossible to imagine how large the universe is
They’ve discovered many other galaxies in the universe.
Because they are very far away and their light has to travel for many years to reach us.
The 3rd Para. Questions:
Scientists have ____________________ the planet Mars to ____________. They have even sent spaceships to ______________ the solar system. However, no spaceship has travelled _______________________ other stars in our Galaxy.
The 4th Para.
sent spaceships to
take photos
travel outside
far enough to reach
Check(√) the true sentences.
1. The earth is a star.
2. The sun is a star.
3. There is more than one galaxy in the universe.
4. The light from the stars in other galaxies has travelled for a long time to reach us.
5. Scientists have received many messages from space.
6. Spaceships have visited most of the universe.
√
√
×
√
×
×
M3U2短文知识点
1.Scientists think that there has been life on the earth for hundreds of millions of 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 don’t think that she is good at English.
Language pointsLanguage points
2. 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。
hundred前加基数词，表示“一百、二百、三百……”，hundred要用单数形式；hundred与of连用表示“数百”时，hundreds of
例如：
There are eight hundred students in our school.
There are hundreds of people in the park.
We planted _____ trees last year.
A. hundreds of B. hundred of
C. five hundreds D. five hundred of
thousand, million, billion和hundred的用法相同。
Practise
3. With so many stars in the universe, are we alone, or is there life out there in space
宇宙中有这么多星球，我们是孤独的吗？抑或太空中还有其他生命存在呢？
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。
with so many stars in the universe是介词短语，作伴随状语。类似的例子还有：
The woman stood there with her hands in the pockets.
那个女士站在那里，手插在口袋里。
Practise
— Why do you always sleep ______
— Because I’m afraid of the dark.
A. by yourself B. with the door open
C. with the window open D. with the light on
4. None of them has an environment like that of the earth, so scientists do not think they will find life on 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。
none of … 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。
None of us has/have been to Mars.
注意：none 与no one（nobody） 的区别：
none既可指人也可指物，通常与表范围的of 短语连用；no one(=nobody)只能指人，不能与of 短语连用。
如： None of us has / have been to Sanya.
我们都没去过三亚。
(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
-_________.
No one
None
5. However, no spaceship has traveled far enough to reach other stars in our 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。
…enough… to do
adj./ adv. + enough + to do sth. 足够…，可以…
not + adj./ adv. + enough + to do 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 soon.
(3) 他年龄不够大，照顾不了自己。
He _______________________________________.
enough money to spend
fast enough to
isn’t old enough to look after himself
66It’s impossible to imagine.
句中的it是形式主语,真正的主语是动词不定式“to imagine”。“It is+adj.+(for sb.) to do sth.”意为“(对某人来说)做某事是……的”。
—Mario, your mobile phone is ringing.
—Wait a minute. It’s dangerous 　　us 　　it while crossing the street.
A.for; answering B.for; to answer
C.of; answer D.of; to answer
B
1.This city ________(call) Hangzhou.
2. The boy is old enough _______(look)
after himself
3. It is impossible _________ (finish )
work today.
4. None of them ______(come) from China.
5. China has ________(billion) of people.
is called
to look
to finish
comes
billions
6. The Sun ___________(not go )around
the earth.
7. _____the Scientists _____(send) spaceship
to the moon yet
8. We sent the spaceship to planets __________
( discover) life .
9. One of __________(galaxy) is the milky galaxy.
10. China _______(send) spaceships tens of
years ago.
doesn’t go
Have sent
to discover
galaxies
sent
当堂小练
1.The earth_____ a planet and it_____ around the sun.
A.are；go B.was；went C.is；go D.is；goes
D
2.There has been life_____ the earth for hundreds of millions of years.
A.in B.on C.of D.at
B
3.He promised to pick me up at the school gate.However, he_____ yet.
A.didn’t arrive B.doesn’t arrive
C.isn’t arriving D.hasn’t arrived
D
4.Why has no one communicated _______ us
A.with B.to C.for D.at
A
6.I tried many ways, but _____ of them worked.
A.all B.both C.neither D.none
当堂小练
D
7.—I’ll be away for a long time.
—Don’t worry.She can look after your pet _____ .
A.careful enough B.enough careful
C.carefully enough D.enough carefully
C
5.It is said that the disease has killed more than ____ people worldwide.
A.two hundreds B.two hundreds’
C.two hundred’s D.two hundred
D
Ⅲ. 下列各句中均有一处错误，请指出并改正。
1. My mother isn’t in. She has been to the supermarket.
_________________________________　　　　　　　　　　　　　　　　
2. Football is so exciting that million of
people in the world play it.
_________________________________　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
3. That is very hard to reach the apples on the tree.
_________________________________　　　　　　　　　　　　　　　
gone
millions
It
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
millions of years
on any other planets
go around the sun
none of them
be called
the solar system
a small part of
billions of stars
in the universe
many other galaxies
far away
have/has to
far enough
so many
communicate with sb.
Thank you!Thank you!
Answer some questions about the passage:
1.Have we found life on Mars
2.How many planets are there in the solar system
3.Which is larger, the galaxy or the universe
4.What have scientists done to look at other
planets
5.Is there life out there in space
No, we haven’t.
Eight.
The universe.
They have sent lots of spaceships.
We don’t know , we have never found any life on other planets .