初中英語外研版 (新標準)八年級下冊Unit 2 We have not found life on any other planets yet優(yōu)秀課件ppt-課件下載-教習(xí)網(wǎng)

Module 3 Journey to spaceUnit 2 We have not found life on any other planets yet.設(shè)計說明本單元通過頭腦風(fēng)暴，激發(fā)學(xué)生的學(xué)習(xí)興趣，增強學(xué)生對于太空領(lǐng)域的了解。通過任務(wù)設(shè)置教學(xué)閱讀課，培養(yǎng)學(xué)生通過細節(jié)獲取信息的能力以及把握文章主旨大意的能力；通過寫作訓(xùn)練，使學(xué)生學(xué)會如何寫描述太空的相關(guān)文章。教學(xué)目標通過本單元的教學(xué)，讓學(xué)生達成以下目標1.知識目標：掌握本單元新單詞及短語：none, environment, that, solar, system, group, galaxy, universe, light, impossible, out, communicate, solar system2.能力目標：讀懂以太空為話題的簡單文章并能識別細節(jié)，并完成相關(guān)話題的寫作任務(wù)3.情感目標：通過讀寫訓(xùn)練，能夠了解中國在太空探索領(lǐng)域取得的偉大成就，增強民族意識和民族自豪感重點難點重點：相關(guān)閱讀技巧的培養(yǎng)難點：讀寫訓(xùn)練，以讀促寫，并完成相關(guān)話題的寫作任務(wù)教學(xué)準備PPT 課件,圖片、學(xué)案等授課時數(shù)2課時教學(xué)過程Step 1 Warming up1.Brain storming: Let students think them over and discuss in groups:How many planets are there in the solar system? What are they?Is there any life on other planets?Ask the students to have a discussion and think them over. Then, the teacher shows students the pictures of eight planets.3.Tell students some background information of people’s effort to land on the moon home and abroad.Step 2 Pre-readingAsk students to work in pairs to talk about Shenzhou-9—a man-made spaceship.What do you know about it？Step 3 Fast-readingRead the passage and choose the best title for it. 1.Anyone out there? 2. Life on the earth3. The sun and other stars 4. The stars at nightAnswer: 1Step 4 Careful readingPara 1:Ask students to read and answer the questions.(1) How many years do the scientists think there has been life on the earth?(2) Have we discovered life on other planets?Answers: (1) For hundreds of millions of years.(2) No, we haven’t.Para 2: Ask students to read and match the words with pictures. Then put the words in the box in order: small—large.Paras 3-4：Ask students to read and complete the table.What scientists have doneWhat we don’t know/can’t do（1） in the universeIt is impossible to imagine （5）（2） Mars to （3）No spaceship has traveled （6） other stars. send spaceships to （4）Answers：（1）discover many other galaxies （2）send spaceships to(3)take photos （4）travel outside the solar system（5）how large the universe is （6）far enough toPara 5: Ask students to read and find out sentences with present perfect tense(現(xiàn)在完成時態(tài)).1.Scientists have always asked the questions…2. Have there been visitors to the earth from other planets?3. Why has no one communicated with us?Step 5 After reading 1 Ask students to listen and read. Check (√) the true sentences.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.Answers：1. × 2. √ 3. √ 4. √ 5. × 6.× Listen and read2 Ask students to listen and read after the tape.3 Ask students to read in groups.4 Ask students to act out.Step 6 Language pointsHowever, we have not found life on any other planets yet.但是，我們在其他星球上還沒有發(fā)現(xiàn)生命。other 形容詞，意為“其他的”，用于修飾名詞。辨析：the other (s)與other (s）：the other與other后可加名詞; the others與others后不加名詞；the other (s)表示一定范圍內(nèi)除去一部分以外后其余的全體；other (s)表示除去一部分以后的（一些）,但不是剩下的全體。One flower is red, and the other (one) is white.一朵花是紅的，另一朵 (花)是白的。Give me some other apples/others, please!請另給我一些（蘋果）吧！It is taller than many other buildings.它比許多其他的建筑物都高。None of them has an environment like that of the earth. 它們中沒有一個有像地球這樣的環(huán)境。辨析：no one與none：no one的同義詞為 nobody, 只用于指人，其后不跟of短語，作主語時謂語用單數(shù)，no one 只能回答who提問的問句。none用于表示對三者或三者以上全部否定，既可指人，也可指物,常用于短語none of+名詞復(fù)數(shù)/代詞，表示 “……中沒有一個”。作主語時，謂語可以是單數(shù)，也可以是復(fù)數(shù); none的反義詞是all, none可與of連用; 可以用來回答how many 或 how much提問的問句。None of us are/is interested in the story.我們沒有人對那個故事感興趣。None of the students in this class has been to England.這個班沒有一個學(xué)生去過英國。—Who are you speaking to?你在跟誰講話？—No one. 沒人。—How many students are there in the room?房間里有多少個學(xué)生?—None. 一個也沒有。3. ...with so many stars in the universe, are we alone...? ……宇宙中有這么多的恒星，我們是唯一的嗎……？辨析：alone與lonely（1）alone既可作形容詞，又可作副詞,意為“單獨的/地，獨自的/地”，沒有感情色彩。 She is afraid of going out alone at night.晚上她害怕一個人出去。(2) lonely形容詞，意為“孤獨的，寂寞的”，具有感情色彩。 He lived alone after his wife left，so he was very lonely. 他妻子離開后，他一個人生活，所以他很孤獨。Do you feel lonely when you are at home alone?你自己一個人在家時感到孤獨嗎？ Step 7 Exercises1. Ask students to read the phrases in the conversation and put them into Chinese.1. hundreds of 2.millions of3. find life 4. go around5. none of… 6.billions of7.in the universe 8.send spaceships to the planet Mars9.far enough 10.communicate with…2.Ask students to complete the passage with the words and expression in the box.(A4) 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 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.Answers: 1. solar system 2. none 3. environment 4. communicateuniverse Step 8 Writing1.Let students look at the picture from a science story for children and answer the questions.(A5)— What have the scientists just received?— They’ve just received a message from one of our spaceships.(1) Where has the spaceship landed? (Mars)(2) What has the spaceship discovered? (people on Mars)(3)Why have the people on Mars not sent us a message? (don’t know how to)(4)Why have the people on Mars not visited us on the earth?(don’t know how to)2. Let students write a passage to describe the picture. Tell them to use their answers to the questions in Activity 5 to help them.We have just received a message from our spaceship to Mars…Possible version:We have 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 haven’t 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 spacecraft from the earth to make TVs, radios, etc. We hope they don’t do the same with this one!Step 9 Homework1. Read the passage.2. Ask students to correct their writing. 板書設(shè)計Unit 2 We have not found life on any other planets yet.none environment group galaxy universe light impossible communicate solar systemThere has/ have been + n. None + of... No one ...communicate with sb. It’s impossible to do ...