3. T: Well done, boys and girls. If you do everything as well as what you do here, I think you can make your dreams come true. And they(who want to be an astronaut.)can travel in space. Maybe you can discover the secret of space. Perhaps you’ll find life on other planets. It’s reported that China plans to take part in an international flight to explore Mars one day. Would you like to be an astronaut when you grow up?

S: Yes, I’d like to.

T: OK. I hope everything goes well.

(板书划线部分词语，然后完成useful expressions的总结。)

2. T: Now, please change the following sentences into passive voice, don’t forget the modal verbs, and put them in the right place.

(1)We can see many stars in the sky on a fine evening.

(2)You may find life on other planets one day.

(3)They must record their daily life in the spaceship.

(4)We should study the universe carefully.

(5)The human beings mustn’t throw garbage into space.

(板书以上句子，挑选学生在黑板上做改写练习。)

(1)We can see many stars in the sky on a fine evening. Many stars can be seen in the sky on a fine evening. 　 S6:　　 (2)You may find life on other planets one day. Life may be found on other planets one day. 　 　 S7: (3)They must record their daily life in the spaceship. Their daily life in the spaceship must be recorded. 　 S8: 　 (4)We should study the universe carefully. The universe should be studied carefully. 　 S9: (5)The human beings mustn’t throw garbage into space. Garbage mustn’t be thrown into space. 　 S10:

(总结改写练习情况，自然导入useful expressions。)

1. T: There are so many stars in space. But no one knows if there is life on other planets in space. Scientists don’t know. I don’t know, either. What do you think of it?

S₁: I don’t know.

S₂: I don’t know, either.

…

T: But do you want to discover the secret?

Ss: Yes, we do.

T: So what can be done to find out the truth?

S₃: More satellites must be sent into space.

S₄: Scientific research should be done carefully.

S₅: Other planets may be visited in the future.

…

(学生会有许多奇思妙想，要允许他们大胆表达，但及时提醒他们用情态动词+被动语态的句型结构，然后总结他们回答或及时记录其中相关的句子，板书后总结语法。)

2.(播放录音，准备好卡片进行游戏活动。)

T: Group 1, you each has a round card. And Group 2, you all have a small card with words on it. Please find you own place--the round card with a letter on it. Then tell us your name and your number.

T: The solar system is in the universe. The sun is the center of the solar system. And the earth goes around the sun. It’s a planet of the sun.

Step 3　 Consolidation　 第三步 巩固(时间：10分钟)

　(领读黑板上的关键词语。)

T: Please look at the words and expressions on the blackboard carefully. Make sure you know each of them. Read after me, first. Pay attention to the pronunciation.

(领读单词后，尽量用这些词语提出问题，引导学生总结短文大意。)

T: How long has life been on the earth?

S₁: For millions of years.

T: Has anybody found life on other planets?

S₂: No, not yet.

T: What is the earth and how does it go?

S₃: The earth is a planet and it goes around the sun.

T: How many other planets are there?

S₄: Eight.

T: How do they go?

S₅: They also go around the sun.

T: What do we call the sun and the planets?

S₆: They are called the solar system.

T: Is it a big or a small part of the universe?

S₇: It’s a small part.

T: OK. Please repeat what you answered just now and we can get the whole paragraph.

(学生按回答问题的先后顺序重复叙述后，继续巩固短文大意。)

T: What have scientists done to explore other planets in our solar system?

S₈: They have sent lots of spaceships to explore other planets in the solar system.

T: Where have some spaceships gone?

S₉: Beyond the solar system.

T: Have anyone discovered any life in space?

S₁₀: No, not yet.

T: Well done, everyone. Let’s read the last paragraph together.

(学生朗读短文最后一段。)

Step 4　 Practice　 第四步 练习 (时间：10分钟)

2. T: If you work hard you can master a lot of knowledge and some basic skills. Then you can fly to the moon, the Mars and some other planets. But can you tell me how many planets there are in the solar system?

S₁₀: Nine.

T: It’s said there has been life on the earth for millions of years. But is there life on other planets? It is still a question. I believe we’ll find out the truth soon in the future, because scientists are working hard all the time. And we have sent lots of spaceships to explore other planets in our solar system. Some spaceships have even gone beyond the solar system.

(板书beyond,并解释，给出更多的例句帮助理解。)

For example:

(1)Beyond the mountains, there was a small river.

(2)The light switch was beyond the child’s reach.

(3)Such tasks are beyond the ability of school children like you.

(4)Maths was always beyond me.

(继续导入新课1a的基本内容。)

T：Do you think there is life on other planets?

(调查几个同学，收集不同意见。)

T: Do you want to find out the truth? OK! Let’s learn a short passage about our planet. Open your books, and turn to Page 99. We’re going to learn Section D.

(板书课题。)

Step 2　 Presentation　 第二步 呈现(时间：10分钟)

Step 1　 Review　 第一步 复习(时间：10分钟)

1. T：We learned something about Mars yesterday. So I’d like you to tell me some information about Mars.

(提问复习Section C中的主要内容。)

T: What’s the color of Mars?

S₁: It’s bright red.

T: What’s the shape of it?

S₂: It’s round. It’s a red and orange ball.

T: What’s the climate like?

S₃: It has the strongest storm during spring and summer.

T: How about the gravity of the Mars?

S₄: It’s about one third as strong as it is on the earth.

T: If you weigh 60 kilos on the earth, how heavy will you be when you are on the Mars?

S₅: Only 20 kilos.

T: Very clever. How far is the sun from Mars?

S₆:228 million kilometres.

T: How big is Mars?

S₇: It’s a quarter as big as the earth.

T: How long does it take a spaceship to fly from the earth to Mars when they’re closest to each other?

S₈: About eight months.

T: Would you like to fly to Mars one day?

S₉: Yes, I’d love to.

(利用学生的兴趣，开始导入新课，并进行情感激励。)

录音机/多媒体课件(关于太阳系结构)/自制四张大小不等的圆形卡片印有A、B、C、D和四张方形小卡片(完成1b所需)

3. Talk about our planet and living things on other planets.

2. Review the usage of modal verb + P.P. :

(1)More satellites must be sent into space.

(2)Scientific research should be done carefully.

(3)Other planets may be visited in the future.

(4)Humans can be cloned by scientists some day.