Module3 Journey to space Unit2 We have not found life on any other planets ye学案

课 题
Module3 Journey to space
Unit2 We have not found life on any other planets yet.第二课时
主备人
集体备课时间
2015.3
上课时间
学习目标
1.To learn to write a passage to describe the picture about space travel using present perfect tense.
2. To learn some key words and useful expressions
学习重点
学习难点
(1) 词汇：other, prefer, also, none, alone, syetem, communicate, environment
(2) 短语: undreds/millions of , any other planets, go around, solar system in the universe
(3) 句型：We have just done…
We haven’t done…yet.
We have already done...
学习过程
学教记录
【自主预学】
认真读P20，找出下列句子并翻译成中文：
Scientists think that there has been life on the earth for hundreds of millions of years.

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2.With so many stars in the universe,are we alone,or is there life out there in space?

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3. Why has no one communicated with us?

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4. However, we have not found life on any other planets yet.
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5. Scientists have also discovered many other galaxies in the universe.
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6. We do not know the answers yet.
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7. None of them has an environment like that of the earth.
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【课堂导学】
1. Careful reading to solve difficult points
2.Complete the passage with the correct form of the words in the box in Activity3.
3. write a passage to describe the picture in Activity6 using present perfect tense.
Possible answer:
We’ve just received a message from our spaceship to Mars. Our spaceship has discovered aliens 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 parts from the other spaceships from the earth to make TVs, radios, etc. We hope they don’t do the same with this one!
【分层助学】
A.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.
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.
B．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.
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2. Football is so exciting that million of people in the world play it.
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That is very hard to reach the apples on the tree.
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【反思促学】
【课后作业】