外研（新标准）版 八年级下 Module 3 Unit 2 We have not found life on any other planets yet. 课件 (共16张PPT)

(共16张PPT)
Module 3
Unit 2
We haven’t found life on other planets yet.
Discussing
How many planets are there in the universe
2. Is there any life on other planets
Activity 2: Read the passage and choose
the best title.
Anyone out there
2. Life on Earth
3. Our solar system
4. The stars at night
Activity 3: Check the true sentences:
The earth is a star.
The sun is a star.
There is more than one galaxy bin the universe.
The light from starts has taken a long time to reach us.
They have received many message from space.
They’ve visited most of the universe.
×
√
√
×
×
×
Activity 5 : pair work
There has been life on Earth for millions of years.
2.We haven’t found life on other planets
yet.
3. None of them has an environment with air, so people and things cannot grow.
4. No one has discovered any life in space yet.
5. Why has no one from other planet sent us a message
6. How much have you grown in the last three years
Language points:
Scientists thinks that there has been life on Earth for hundreds ofmillions of years. 科学家认为地球上存在生命已经亿万年了。
精讲:这是一个含有that 引导的宾语从句的复合句,从句中there has been 是there be 结构的现在完成时态。
Language points:
millions of 是一个常用短语，表示 “数百万计的…”,指不确切数字,而确切数字是:one, two, three等基数词+ hundred, thousand, million 或billion +可数名词复数.
e.g.
我们学校有四百名学生。
There are four hundred students in our school.
no one 意思是 “没人”, 是两个单词. no one=nobody,指人; 做主语时,谓语动词只能用单数,不能用复数. no one 后面不能接of.
e.g.
关于那件事没人告诉过我们。
No one told us about that.
none 也有 “没人” 之意,而且还有 “ 没有物” 之意, 不过是指三人或三人以上的人或物. 做主语时,其谓遇动词用单复数都可以. none一般可与 of 连用.
e.g.你们都没有完成这项工作。
None of you have finished the work.
Put the sentences into English.
1 很难弄清楚宇宙到底有多大．
It is ______ _______ understand how _________ _______
________ _______.
2. 科学家认为地球上的生命已有数百万年．
Scientists think that _______ ______ ______ life on Earth for _______ _____ years.
3. 来自星星上的光花了很长时间才到我们这儿来．
The light from stars _____ _____ a long time _____ _____ us .
4. 我们还没有在其他星球上发现生命．
We ______ ______ life on other planets ______.
hard
to
large
the
universe
is
there has been
millions of
has taken
to
reach
haven’t found
yet
Scientists think that there on Earth for years. However, they life on other planets yet. We also know the Earth is only one of ______ planets and it the sun. The sun and its planets are called . Scientists have spacecrafts into space because they want to know more about our space. We’re looking forward to __ more messages from space. Maybe one day more people can take the
and can live there happily.
has been life
millions of
haven’t found
the nine
goes around
the solar system
sent lots of
receiving
spaceshuttle to space
Homework
熟读课文，听写重点句
目标Ｕ2