1、Unit 2 We have not found life on any other planets yet.Teaching modelReading and writing. Teaching method Top-down approach Teaching aims1. Listen for specific information.2. Talk about space travel; participating in a role-play.3. Read and find out information from simple texts and choose the best
2、title.4. Write a passage to describe the picture.Teaching Objectives Key vocabulary: none, environment, that, solar, system, solar system, group, galaxy, universe, light, impossible, take-took-taken, out, communicate Teaching aidsRecorder, OHP, video Teaching StepsStep 1 Warming-up1. Show some pictu
3、res to review the text of Unit 1.2. Show some pictures.3. Talk about the pictures.4. Introduce the new words.5. Read the words after the teacher.Step 2 Work in pairs. 1. Enjoy News Report.2. Show some pictures to talk about something about Shenzhou-93. Ask the students to look at the picture in Acti
4、vity 1.4. Work in pairs. Shenzhou-9 is a manned spaceship.Step 3 Reading1. Play the recording and listen to the tape carefully.2. Ask the students to read through the passage.3. Choose the best title for it.1) Anyone out there? 2) Life on the earth 3) The sun and other stars 4) The stars at night4.
5、Check with a partner.5. Call back the answers from the whole class.6. Read the text together.Step 4 Check ( ) the true sentences.1. Ask the students to read the sentences in Activity 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
6、 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.2. Read the passage again.3. Check ( ) the true sentences.4. Check with a partner.5. Call back the answers from the whole class.Keys
7、: 1. 2. 3. 4. 5. 6. Step 5 Complete the passage.1. Ask the students to read the words in the box in Activity municate environment none solar system universe2. Ask the students to read through the passage in Activity 4.Is there life on other planets? There are seven other planets in our (1) _, but (2
8、) _ of them has a(n) (3) _ like that of the earth. Spaceships from the earth have done surveys of the other planets, but they have not found ant 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
9、, but some scientists believe that they will find it some day.3. Complete the passage with the words and expression in the box.4. Check with a partner.5. Call back the answers from the whole class.Keys: 1. solar system 2. none 3. environment 4. communicate 5. universe6. Read the passage together.Ste
10、p 6 Language points1. Scientists think that there has been life on Earth for hundreds of millions of years. 科学家认为地球上的生命已经有亿万年了。millions of数百万，hundreds of 数百，thousands of 成千上万，billions of 数十亿e.g. There are billions of stars in the Galaxy, and our sun is only one of them.银河系中有数十亿颗恒星，我们的太阳只是其中的一个。2. Ho
11、wever, we have not found life on any other planets yet.然而，我们还没有在任何其他行星上发现生命。yet用于否定句和疑问句，意思是“还，尚”。notyet的意思是“还没，尚未”，表示某事物在某一时间尚未发生，但未来也许会发生。例如：I havent learnt any farther information yet. 我还没有得到进一步的信息。Have you received her letter yet? 你收到她的来信了吗？3. The Earth is a planet and it goes around the Sun. Se
12、ven other planets also go around the sun. 地球是颗行星，它围绕着太阳转。还有其他七颗行星也围绕着太阳转。太阳系的其他七颗行星：水星(Mercury)、金星(Venus)、火星(Mars)、木星(Jupiter)、土星(Saturn)、天王星(Uranus)、海王星(Neptune)。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，因此科学家认
13、为在他们上面找不到生命。none of 表示（三个以上）一个也没有。作主语时，谓语动词可用单数或复数。如：None of us has / have been to the Mars. 我们中没一个去过火星。5. our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way.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，这个星系比太阳系大得多，称作银河系或银河。这里的the Galaxy专指“银河系”，也可以称作 the M
14、ilky Way。而galaxy则泛指“星系”。例如：Scientists have discovered a distant galaxy. 科学家们发现了一个遥远的星系。6. So how large is the universe? Its impossible to imagine.所以宇宙有多大？我们无从想象。句型: It is +形容词 + to +动词原形，意思是“做某事很”It is difficult to read these words. 读这些单词很难。7. With so many stars in the universe, are we alone, or is
15、there life out there in space? 宇宙中有这么多恒星，我们是孤独的吗？抑或太空中还有其他生命存在呢？with + 名词 + 介词短语，表示伴随情况，意思是“带着”。 例如：Mr. Zhang is coming with a book in his hands.张老师手里带着一书进来了。alone 在句中作形容词，不作定语只作表语，也可作副词。意思是“独自地”。例如：She was alone in that dark room. 她独自一人呆在那黑屋子里。Step 7 Look and answer the questions.1. Look at the pic
16、ture from a science story for children in Activity 5. 2. Read through the example sentences.What have the scientists just received? (a message from one of our spaceships)They have just received a message from one of our spaceships.3. Ask the students to answer the questions.1) Where has the spaceshi
17、p landed? (Mars)2) What has the spaceship discovered? (people on Mars)3) Why have the people on Mars not sent us a message? (do not know how to)4) Why have the people on Mars not visited us on the earth? (do not know how to)4. Check with a partner.5. Call back the answers from the whole class.Keys:1
18、. It has landed on Mars.2. It has discovered people on Mars.3. They do not know how to send us a message.4. They do not know how to visit us on the earth.Step 8 Writing.Write a passage to describe the picture. Use your answers to the questions in Activity 5 to help you.We have just received a messag
19、e from our spaceship to MarsStep 9 Do exercises:中考链接：( )1. Wheres Mr Green? He _ to Changsha. (2013湖南湘西)A. have beenB. has goneC. has been( )2. Is Tom at home? No, he_ to town. (2013天津) A. has been B. has gone C. goes D. will go ( )3. Miss Brown, we _ cleaning our classroom. Can we go home now?(2015广州)A. finish B. finishing C. are finished D. have finished( )4. A number of tourists _ Yangzhou many times because it is such a beautiful city. (2013扬州)A. have been to B. has been to C. has gone to D. have gone toKeys: 1. B 2. B 3. D 4. A
