高二英语unit13教案

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高二英语Unit13 The water planet知识点总复习教案推荐度：
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高二英语人教版unit13教案

Teaching Plan of Unit 13 The water planet Tasks which should be achieved in this unit: a. Achieve language skills and related knowledge about the topic of water and the ocean. b. Learn how to make suggestions and how to express opinions. The water is being used to /for…. We should/ could…. If we …, we can …. It would be better to … c. Vocabulary in this unit: benefit, disadvantage, range, available, pure, mass, float, absorb, stable, bottom; d. Useful expressions: benefit from, range from … to…., all the way, be made up of, that is, freezing point, break down, mix with, be measured in…, take advantage of…, keep … steady, manage to do. e. Grammar: Review Modal Verbs. 情态动词can, could, may, might, will, would, shall, should, must, can’t 等的用法。 1) can /could Jin can speak English well. (ability) Could you please show me the way to Beihai Park? (request) 2) may /might May we see the awards for the teams? (permission; request) She might give you some new clothing. (possibility) 3) will /would The Spring Festival is the most fun. The whole family will come for dinner. (promise; agreement) Often he would dress up like a rich man. (past habit; custom) 4) shall /should The harvest festival begins on Saturday. We shall be there with our friends. (promise; agreement) You should arrive at the airport two hours before he goes. (advice) 5) must /can’t Wang Feng wins an award every year. He must be very strong (speculation) You must be joking. That can’t be true. (guessing) Teaching procedure: Period 1. Contents: Warming up & reading comprehension Step 1.Warming up Aim: Make students get to know something about water. Step 2. Pre-reading 1.Show some pictures of making electricity, irritating in agriculture, transport by ships, etc,. 2. group work: How is the water being used? Step 3. While-reading 1.Scanning: Ss read scan the bold words in the passage and understand the structure of the passage. How many parts are there in the passage? 2.Ss read and get the main ideas of each part. Part 1(para1): the properties of water; Part2(Para2): chemical structure of water---H2O Part3(Para3): salinity----- the percentage of salt. Part4(Para4): Density Part5(Para5): heat capacity Part6(Para6-7) Ocean motion Step 4. After-reading Finish the post-reading Ex on P21. Step 5. Assignment 1. surf the internet and get more information about water and ocean using search engines like yahoo or baidu. ( or just input the key words like Jules Verne into the address column of IE) 2. discussion: What will you prepare for writing an explanation of corals? After discussion, work out an outline. Period 2. Contents: difficulties in the passage. Step 1. Warming up Ask some Ss to present their homework. Step 2. Learning about the language: Play the tape for students to follow. Teacher explain some language points in the text on page 19--20. 1. Who benefits from using water in this way? Benefit…from/ by… This song reminds me of France. Remind me to answer the letter. I reminded her that the book would cost her much. 2. Life in the oceans ranges from the tiniest plankton all the way to giant like sharks and whales. Range from… to…/ range between …. And…. 意为“从。。。。到。。。不等；在一定的范围内变化”，例如： Temperatures here range from 10 to 30 degrees centigrade. Prices range between ￡7 and ￡10. His interests ranged from chess to canoeing. 3. The two hydrogen atoms form a polar molecule, that is, one with a slightly positive end and one with a slightly negative end. That is 用作插入8，意为“那就是，即” My birthday is a week later, that is, March 1st. John is a New Yorker, that is , he lives in New York. 4. The nutrients in whatever falls into the ocean will quickly become available to other living creatures. Whatever 引导名词性从句作宾语。 Tell me whatever is troubling you. She is always succeeds in whatever she tries. 5. Marine animals and plants take advantage of the density of water. Take advantage of “利用，欺骗” Taking advantage of his friends, Mr. Li was scolded. He always takes advantage of mistakes made by others. Step 3. Practice Ss finish on page 14 by themselves and then check the answers. Step 4. Assignment 1. Learn the useful expressions by heart. 2. Finish Ex1 –3 on page 96-97 on WB 3. read the whole passage aloud. Period 3. Contents: Grammar; talking and speaking Step 1. Revision Check the answers of Ex 1 – 3 on page 96-97. Step 2. Review Modal Verbs. 1 情态动词的语法特征　1）情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。　2）情态动词除ought 和have 外，后面只能接不带to 的不定式。　3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。　4）情态动词没有非谓语形式，即没有不定式，分词，等形式。　 2 比较can 和be able to 1）can/could 表示能力；可能（过去时用could）, 只用于现在式和过去式（could）。be able to可以用于各种时态。例如：　 They will be able to tell you the news soon. 他很快就能告诉你消息了。 2）只用be able to的情况：　 a. 位于助动词后。　 b. 情态动词后。　 c. 表示过去某时刻动作时。　 d. 用于句首表示条件。　 e. 表示成功地做了某事时，用was/were able to，不能用could。例如： He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out. 他在战争爆发之前逃离欧洲。注意：could有时不表示时态 1）提出委婉的请求，（注意在回答中不可用could）。例如：　　 --- Could I have the television on? 我能看电视吗？　　 --- Yes, you can. / No, you cant. 可以/不可以。 2）在否定句、疑问句中表示推测或怀疑。例如：　　 He couldnt be a bad man. 他不大可能是坏人。　 3 比较may和might 1）表示允许或请求；表示没有把握的推测；may 放在句首，表示祝愿。例如：　　May God bless you! 愿上帝保佑你！　　He might be at home. 他可能在家。注意：might 表示推测时，不表示时态，只是可能性比may 小。 2）成语：may/might as well，后面接不带to 的不定式，意为不妨。例如：　　　If that is the case, we may as well try.如果情况确实如此，我们不妨试一试。典型例题　 Peter ___come with us tonight, but he isnt very sure yet. A. must　　 B. may　 C. can　 D. will 答案B. 表可能性只能用may。此句意可从后半句推出。 4 比较have to和must 1）两词都是必须的意思，have to 表示客观的需要，must 表示说话人主观上的看法，既主观上的必要。例如： My brother was very ill, so I had to call the doctor in the middle of the night.　弟弟病得很厉害，我只得半夜里把医生请来。（客观上需要做这件事）　　He said that they must work hard. 他说他们必须努力工作。（主观上要做这件事） 2）　have to有人称、数、时态的变化，而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。例如： He had to look after his sister yesterday. 他昨晚只得照顾他姐姐。 3）否定结构中：dont have to表示不必，mustnt表示禁止。例如：　　 You dont have to tell him about it.　你不一定要把此事告诉他。　　 You mustnt tell him about it.　　　　你不得把这件事告诉他。 5 must表示推测　1） must用在肯定句中表示较有把握的推测，意为一定。　2） must表对现在的状态或现在正发生的事情的推测时，must 后面通常接系动词be 的原形或行为动词的进行式。例如：　　　You have worked hard all day. You must be tired. 你辛苦干一整天，一定累了。（对现在情况的推测判断）　　　He must be working in his office. 他一定在办公室工作呢。　比较：He must be staying there. 他现在肯定在那里。　　　　　　He must stay there. 他必须呆在那。　3） must 表示对已发生的事情的推测时，must 要接完成式。例如：　　 I didnt hear the phone. I must have been asleep.　我刚才没有听到电话，我想必是睡着了。　4） must表示对过去某时正发生的事情的推测，must 后面要接不定式的完成进行式。例如：　　---Why didnt you answer my phone call? 为何不接我的电话？　　---Well, I must have been sleeping, so I didnt hear it.唉，肯定在睡觉，所以没有听见。　5）否定推测用cant。例如：　　 If Tom didnt leave here until five oclock, he cant be home yet.　如果汤姆

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