人教版八年级下册英语unit7第七课时ppt课件.ppt

1、Revision Ask some students to read the article in 2b 鲸的体型是世界上存在的动物中最大的，鲸的体型是世界上存在的动物中最大的， 鲸是终生生活在水中的哺乳动物，对水的依鲸是终生生活在水中的哺乳动物，对水的依 赖程度很大，以致它们一旦离开了水便无法赖程度很大，以致它们一旦离开了水便无法 生活，鲸形状像鱼，鼻孔在头的上部，用肺生活，鲸形状像鱼，鼻孔在头的上部，用肺 呼吸。体长可达三十米，是现在世界上最大呼吸。体长可达三十米，是现在世界上最大 的动物。的动物。 Check the preview 鲸为适应水中生活，减少阻力，它们的鲸为适应水中生活，减

2、少阻力，它们的 后肢消失，前肢变成划水的浆板。身体成为后肢消失，前肢变成划水的浆板。身体成为 流线型，酷似鱼。因而它们的潜水能力很强，流线型，酷似鱼。因而它们的潜水能力很强， 小型齿鲸可潜至小型齿鲸可潜至100100- -300300米的水深处，停留米的水深处，停留4 4- - 5 5分钟，长须鲸可在水下分钟，长须鲸可在水下300300- -500500米处待上米处待上1 1小小 时，最大的齿鲸时，最大的齿鲸-抹香鲸能潜至千米以下，抹香鲸能潜至千米以下， 并在水中持续并在水中持续2 2小时之久。小时之久。 Read the following words and phrases about w

3、hales. Put them in the correct place in the chart. 1. Humans catch whales for meat, fat and oil 2. Eat small fish and other sea life 3. Jump high out of the water 4. Rules on whale protection 5. Huge 6. Water pollution 3a Task 1 7. Live in the sea 8. Some kinds have teeth 9. Learn more about whales

4、10. Stop putting rubbish into the sea 11. Sing songs 12. Whale parts sold to make things likes candles and soap What do they look like？ Where do they live? What do they eat? What can they do? Why do some of them have to be protected? How can we protected them? 5 8 7 2 3 11 1 6 12 4 9 10 Write a para

5、graph about whales and why they need to be protected. Use the information in 3a. Then make a poster. 3b Task 2 Whales are They live in They eat They can One interesting fact is Another interesting fact is Some kinds of whales are in danger because We should protect whales from I think people should/

6、shouldnt 1. Complete the chart. Adjectives Comparatives Superlatives high dangerous long popular higher highest more dangerous the most dangerous longer longest more popular the most popular Task 3 2. Match verbs and objects. Then add one more object to each list. Verbs Objects 1. reach a. my life,

7、my money, 2. achieve b. the top of a mountain, the library, 3. risk c. my dream, success, my health the ends the farmhouse Task 4 3. Circle the correct word and /or fill in the blank with the correct form of the word in brackets for each sentence. 1. An elephant weighs (few/many) times more than a d

8、og. 2. An adult panda can eat (much/a little) more than a cat. 3. Canada is a (little/lot) less _ (crowded) than China. 4. A tiger is (much/a little) _ (strong) than a man. more crowded stronger Task 5 1. The biggest _ in the world is the Sahara. 2. The river is too _ to swim in. 3. China is one of

9、_ civilizations (文明文明) in the world. 4. The _ of the fastest animal is 120 kilometers per hour. 5. What _ do you need for your coat? I want a large one. desert dirty the oldest 一、根据句意，用适当的词填空。一、根据句意，用适当的词填空。 speed size 二、用括号内单词的适当形式填空。二、用括号内单词的适当形式填空。 1. Jim is very _. Li Lei is _ than Jim. (hungry)

10、 2. Kates mooncakes are _ of all. (nice) 3. Your box is _ than mine. But his is _ of the three. (heavy) 4. Unit 2 is quite _. Unit 3 is _ than Unit 2. Its _ in Module 1. (hard) 5. This TV play is _ than that one. (good) hungry hungrier nicer heavier heaviest hard harder the hardest better 6. My moth

11、er is very _. She is _ in my family. (busy) 7. Lingling gets to school _ than the others. (early) 8. She speaks English _ in our class. (well) 9. Lucy jumped quite _. (far) 10. I think English is as _ as Chinese. (important) 11. This picture is _ of the four. (beautiful) 12. Lucy did _ than Lily. (b

12、ad) busy busiest earlier best far important the most beautiful worse 三、单项选择。三、单项选择。 1. My brother is _ more outgoing than me. A. many B. little C. much 2. October 12th was one of _ days in 2005. Shenzhou-VI was launched（发射）（发射） successfully. A. exciting B. more exciting C. the most exciting 3. Which

13、 city is _, Beijing, Shanghai or Fuzhou? A. beautiful B. the most beautiful C. more beautiful C C B 4. _ children there are in a family, _ their life will be. A. The less, the better B. Fewer, richer C. The fewer, the better 5. Mobile phones are very popular now and they are _ than before. A. cheap

14、B. cheaper C. the cheapest 6. In our city, its _ in July, but its even _ in August. A. hotter, hottest B. hot, hot C. hot, hotter A B C 7. Jacks handwriting is as _ as Mikes. A. good B. better C. best 8. We can do the work better with _ money and _ people. A. little, few B. less, fewer C. fewer, les

15、s 9. Jim is the tallest student in our class and Tom is the second _ one. A. tall B. taller C. tallest A B C Important phrases: feel free as far as I know in the face of even though at birth up to run over walk into fall over or so 随意随意 就我所知就我所知 面对（问题、困难）面对（问题、困难） 即使；虽然即使；虽然 出生时出生时 到达到达 跑上前去；跑过去跑上前去

16、；跑过去 走路时撞着走路时撞着 绊倒绊倒 大约大约 Important sentences: Whats the highest mountains in the world? Qomolangma. How long is Qomolangma? Its 8,844.43 meters high. Its higher than any other mountain. Which is the deepest salt lake in the world? The Caspian Sea is the deepest of all the salt lake. Did you know th

17、at China is one of the oldest countries in the world? Yes, I did. Its much older than the US. 1. cm taller/shorter 2. much /even/a little/less +比较级比较级 3. times more than . 4. Talk about how to protect pandas. Important structures: 1. Write a paragraph about how to protect endangered animals, use the useful sentences in 3b. 2. Remember the words, phrases and sentences in this unit. 3. Preview the new words in Unit 8