(共24张PPT)
Unit2 We have not found life on any other planets yet.
Match the words with the pictures.
A. galaxy
B. planet
C. solar system
D. star
E. universe
A
D
B
E
C
星系
恒星
太阳系
行星
宇宙
Put the words and expressions in the box in order: small – large.
galaxy planet solar system star universe
3
2
1
3
4
5
1. planet 2. star 3. solar system 4. galaxy 5. universe
How many planets are there in the solar system
水星
金星
地球
火星
木星
土星
天王星
海王星
Work in pairs. Look at the picture and talk about Chinese spaceships.
1
Shenzhou-9 is a manned spaceship
Read the passage and choose the best title for it.
2
1. Anyone out there
2. Life on the earth
3. The sun and other stars
4. The stars at night
√
adv.在远方
Check (√) the true sentences.
3
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.
√
√
√
Fill in the blanks according to the passage.
the (1) _________
the Galaxy or the Milky Way
other galaxies
the (2) _______
other stars
(3) ______
eight planets
(4) ______
Mars
other planets
universe
solar system
the sun
the earth
[观察1] None of them has an environment like that of the earth.
它们中没有一颗(行星)有像地球那样的环境。
There’s no one in the classroom.
教室里没人。
—How many boys are there in the room 房间里有多少个男孩
—None. 一个也没有。
—Who is in the room 谁在房间里
—No one. 没人。
[拓展] none与 no one
none (1)意为“没有一个”。 既可指 ,又可指 ,可与
连用。
(2)none of与可数名词复数连用作主语时,谓语动词用单数或复数形式均可。如:None of the students comes/come from America. 没有一个学生是来自美国的。
none of与不可数名词连用作主语时,谓语动词用单数形式。
(3)常用于回答how many/how much引导的疑问句。
人
物
of
no one (1)意为“ ”。 只可指人,不可指物, _______ (能/不能)与of连用。
(2)作主语时,谓语动词用单数形式。
(3)只能回答以who开头的疑问句。
没有人
不能
活学活用
—I tried many ways to solve the problem, but
of them worked.
—Never give up. You’ll surely make it.
A.all B.none C.neither
B
[观察2] …our solar system is a small part of a much larger group of stars and planets…
……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……
A group of people are walking up the Great Wall.
一群人正在登长城。
[探究] group是可数名词,常构成短语 a group of, 意为 “ ”,其后只能接可数名词复数。
一群
[拓展] group是可数名词,常构成短语 a group of, 意为 “ ”,其后只能接可数名词复数。
(1)a group of后面接复数名词时,谓语动词用复数形式;而a pair of/a piece of等后面接复数名词时,谓语动词用单数形式,即“数词+pair(s) of”在句中作主语时,谓语动词要与pair的单复数保持一致。
A group of students are running on the playground.
一群学生正在操场上跑步。
(2)in groups意为“成群结队地;以小组为单位”。
Do you teach your students singly or in groups
你教学生是单个教还是按组教
一组
活学活用
用所给动词的适当形式填空
①Look! A group of Americans (visit)the History Museum now.
②The pair of sunglasses (look) cool. The sunglasses_______ (be) colourful.
are visiting
looks
are
[观察3] Why has no one from other planets tried to communicate with us
为什么没有一个来自其他行星上的人与我们联系过
She often communicates with her mother by phone.
她经常用电话和妈妈交流。
[探究] communicate用作不及物动词,意为“ ”;其名词形式为communication。communicate with sb.意为“ ”。
联系;交流
和某人沟通/交流
[拓展] communicate用作及物动词,意为“传达;传递”。communicate sth. to sb.意为“把某事传达给某人”。
People now communicate greetings to each other by email or by mobile phone.
人们现在使用电子邮件或手机传递问候。
活学活用
Today, WeChat(微信) becomes very popular, and more and more people like to use it to each other.
A.depend on
B.communicate with
C.believe in
B
[观察4] It is impossible to imagine.无法想象。
[探究] 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”。
It’s necessary for us to wait in line.
对我们来说,排队等候是有必要的。
活学活用
—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
Complete the passage with the words and expression in the box.
4
Is there life on other planets There are seven other planets in our (1) ____________, but (2) ______ of them has a(n) (3) ____________ like that of the earth. Spaceships from the earth have done surveys of the other planets, but
communicate, environment, none, solar system, universe
solar system
none
environment
they have not found any life there. Why has no one from other planets tried to (4) ___________ with us It is true that scientists have not discovered life on other planets in the (5) _________ yet, but some scientists believe that they will find it some day.
communicate, environment, none, solar system, universe
communicate
universe
Summary
hundreds of millions of
the solar system
billions of
discovered
Mars
outside
alone
life
GOOD JOB
