新外研版八下M3 Unit 2 We have not found life on any other planets yet (18).ppt

Ⅱ. 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. just never ever already yet What have the scientists just received? (a message from one of our spaceships) Look at the picture from a science story for children and answer the questions. P21 5 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) The spaceship has landed on Mars. The spaceship has 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) The people on Mars haven’t sent us a message because they don’t know how to communicate with us.. They haven’t visited us on the earth because they don’t know how to fly to our planet. exercise 一. 用方框中的单词的正确形式完成下列句子。 1. _____ of the students has been to Australia. 2. A: How much is your new coat. B: It _____ me 150 yuan. billion cost planet alone none None cost 3. A: Do you often go online, Zhao Hui? B: No. I like to go online when I am ______ at home. 4. A: How many people are there in China now? B: It has reached 1.3 ______. 5. The boy is only five years old, but he knows about many _______. alone billion planets 二. 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. _________________________________　　　　　　　　　　　　　　　　 2. Football is so exciting that million of people in the world play it. ____________________