1、揭阳第三中学教案表课题 Book6 Unit4 Global Warming 课型 Warming up and reading教学目标1. Enable the students to talk about different sources of energy and express their own ideas.来源:学科网2. Help the students learn how to give their ideas about the use of energy.重点难点Enable the students to learn how to express agreement
2、and disagreement.Enable the students to express agreement and disagreement. 教具准备 A computer and blackboard课时安排 Two教学过程与教学内容教学方法、教 学手段与学法、学情Step 1: Greetings. Greet the students as usual. Step 2: Warming up 1. Show the students some pictures. From the following pictures, they will know where all this
3、 energy comes from.windmill a coal power stationTeaching methods:Brainstorming, listening and group work.an oil refinery a nuclear power plantsolar panels hydro-electric dam2. Are the following resources renewable or non-renewable?1)2)Step 3: Pre-reading1. What is the greenhouse made and used for?A
4、greenhouse is made of glass and is used for growing plants, especially during cold weather.2. How does it work?The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.3. W
5、hat are the “greenhouse gases”?In the atmosphere surrounding the earth there are gases called “greenhouse gases”, including carbon dioxide, methane (甲烷, 沼气) and water vapor.4. What do you think greenhouse gases do?They trap the heat of the sun and keep the air surrounding the earth warm. Step 4: Rea
6、ding1. Skimming: Glance quickly at the magazine article and answer the questions.(1) Who wrote the magazine article? What is the name of the magazine?(2) What are the names of the three scientists mentioned in the article?(3) What do they think about global warming? Do they agree with one another?(4
7、) What are the two graphs about?(5) What is the main topic of the article?2. Careful readingTask1: Read the article carefully. Are these statements true or false? (2) The temperature in the last century did not seem to increase much. T(2) Everyone believes that global warming is caused by the activi
8、ties of humans. F(3) Janice Foster believes that she can measure the future global rise in temperature. F(4) The rise in carbon dioxide is causing a steady increase in global warming. T(5) George Hambley believes that global warming will do good rather than harm to the earth. F(6) It is clear what t
9、he effects of global warming will be. FTask2: Fill in the blanks.Scientists OpinionsDr. Janice Foster We need _ like carbon dioxide, methane and water vapour, but if we add huge _ extra carbon dioxide to the atmosphere by burning fossil fuels, it will cause the _ to go up. Over the next 100 years th
10、e amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees Celsius. An increase of five degrees would be a _.George Hambley Believes that we shouldnt worry about _ of carbon dioxide in the air. Predicts that any warming will be mild with few bad environment
11、al _. _ that more carbon dioxide is actually a _ thing, which will make life for human beings better.Suggested answers:gases quantities of global temperature catastrophehigh levels consequences States positiveStep5 Homework1. Read the passage again and review the new words and expressions.2. Finish
12、“课时达标检测 10”板书Unit4 Global Warming1. windmill a coal power station solar panels hydro-electric dam an oil refinery a nuclear power plant2. renewable or non-renewable3. greenhouse “greenhouse gases” 4. TFFTFF5. gases quantities of global temperature catastrophehigh levels consequences States positive教
13、学反思Its a great topic in this unit. With the environmental problems more and more serious, its time for high students to know more about it, pay more attention to it and do something. During the class, students seemed to be quite familiar with this topic, and enthusiastic about talking it. However, w
14、ith time limited, the students didnt go further with this topic. I think if time permitted, a debate or a further discussion about environmental problems can be developed.课题 Unit4 Global Warming 课型 language points教学目标1. Enable the students to talk about the causes and effects of global warming.2. He
15、lp the students learn how to talk about the causes and effects of global warming and express ideas about what people should do about it.重点难点1. Enable the students to learn the writing skills of the text and get a better understanding of articles of this kind.2. Help the students learn how to debate
16、over the topic “We should do nothing about global warming.”教具准备 A projector, and a blackboard课时安排 Two教学过程与教学内容 教学方法、教学手 段与学法、学情Teaching procedures Step 1 Revision1) Read the words and expressions.2) Retell the text.Step2 Language pointsT: Now lets learn some language points of the text.Slide showPhr
17、ases:1. So how has this come about and does it matter?come about 是不及物短语，意为“发生” 。(1) Please tell me how the accident _. I am still in the dark. A. came by B. came outC. came to D. came about(2) Its already 10 oclock. I wonder how it _ that she was two hours late on such a short trip. A. came over B.
18、came out Teaching methods: discussing, summarizing and practicingC. came about D. came up Suggested answers: DC2. result in 导致, 造成= lead toe.g. (1) The earthquake resulted in the death of many people. (2) Davids carelessness resulted in his failure.知识拓展 result from 起因于，由于e.g. (1) The development of
19、the city results from its tourist attractions.(2) We have to deal with problems resulting from unemployment.即时练用适当的介词填空。(1) Maxs success resulted from accepting the advice of his teacher.(2) The excellent class atmosphere resulted in the increase in knowledge gained by students.3. consequence e.g. W
20、hat will the consequence be?这会有什么后果呢？知识拓展in consequence 因此as a consequence 结果as a consequence of 由于的结果4. quantities ofquantities of 大量的，其后既可以跟可数名词，也可以跟不可数名词。e.g. Rose owns quantities of books.In summer, quantities of fruit and vegetables are preserved in the fridge.当“quantities of / a quantity of +
21、名词”作主语时，谓语动词的数取决于 quantity 的数，而与所修饰的名词无关。e.g. (1) There is a large quantity of snow in this area.(2) There are quantities of snow in this area.即时练根据汉语提示，补全下列句子。(1) Large quantities of beer have been sold(已被售出) in this shop.(2) A large quantities of students(大量的学生) crowded into the library.5. tend观察
22、tend 在下列各句中的词性、含义及用法。1. Janet tends to get very angry if you cant satisfy her demands.2. David tends towards obesity.3. Sofia was tending to her son in the bedroom.4. The nurse skillfully tended the soldiers wound.5. Mary will tend the garden while youre on vacation.从以上例句我们可以看出，tend 既可作及物动词也可作不及物动词。
23、作不及物动词时，意为“易于” ，构成 tend to do sth. 结构，意为“易于做某事” （句 1） ；“趋向” ，后常接 towards 或 to（句2） ；“照顾” ，构成 tend to sb. / sth. 结构（句 3） 。作及物动词时，意为“照顾；护理” （句 4、句 5） 。Sentences:1. There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random
24、but natural phenomenon.句型分析 本句的主句是 There is no doubt，从句是两个由 that 引导的同位语从句。(1)There is no doubt that .是固定句型，意为“毫无疑问 ”，that 引导的是同位语从句，用来进一步补充说明 doubt 的具体内容。考例 Some researchers believe that there is no doubt _ a cure for AIDS will be found.(广东 2005) （B） A. which B. that C. what D. whetherThere is no do
25、ubt that .There is some doubt whether .主句为肯定句时，doubt 后使用连词 whether。主句为否定句时，doubt 后则使用连词 that。(2)it is . that . 在此句中构成强调句型，强调的是主语human activity。强调句型除谓语不能强调外，可强调主语、宾语或状语。考例 1 It is not who is right but what is right _ is of importance. (重庆 2007) (C)A. which B. it C. that D. this 考例 2 I dont mind her c
26、riticizing me, but _ is how she does it that I object to. (江西 2007) (A)A. it B. that C. this D. which 2. Without the green house effect, the earth would be about thirty-three degrees Celsius cooler than it is. 如果没有温室效应，地球会比现在冷 33。这是一个含蓄虚拟条件句 应该注意有时假设的情况并不以条件从句形式表示出来，而是通过一个介词短语或其他方式表示。常用的词或短语有：withou
27、t, but for, but that, otherwise, or, but 等。 e.g.(1) Without your help ( = If we had not had your help), we could not have succeeded.要是没有你的帮助，我们是不会成功的。 (2)He was having a meeting with his students; otherwise he would have come. 他当时正与他的学生进行讨论，否则的话他就来帮我们了。 Step3 ConsolidationI. 根据下列各句句意及所给单词的首字母或汉语提示，写
28、出各单词的正确形式。1. A large q_ of rice is badly needed here.2. Students are from a wide r_ of backgrounds.3. She studied hard, and in c_ she passed the exam.4. The park attracts 4 million visitors p_ year.5. What sort of _ (燃料) do these machines need?6. The _ (数据) is still being analysed. So dont be so wor
29、ried.7. The earthquake was a terrible _ (大灾难 ).8. A rainbow is a natural _ (现象) especially after a heavy rain.9. The _ (曲线图) of export indicates a new success of the company.Suggested Answers:Quantity range consequence per fuel data catastrophe phenomenon graphII. 根据句意 , 选择适当的单词或短语填空1. climate; weat
30、hera. Its very difficult for her to get used to the dry and cold _ there. (climate)b. How we wish the sunny _ could keep up for another several days! (weather)2. come about; come acrossa. Ive never _ anyone quite like her before. (come across)b. Please tell me how the accident _. I am still in the d
31、ark.(came about)3. quantity; quality a. Much of the land was of poor _. (quality)b. Buy vegetables in small _, for your immediate use. (quantity)4. result in; result froma. The accident _ the death of three people. (resulted in)b. His failure _ not working hard enough. (resulted from)III. 每空一词, 使两个句
32、子的意思相同。1. It was very late, but they went on working.It was very late, but they _ working. (kept on)2. We dont doubt that he can do a good job._ he can do a good job. (There is no doubt)3. Their carelessness led to the failure.Their carelessness _ the failure. (resulted in)4. I dont know how the acc
33、ident happened.I dont know how the accident _. (came about)5. The factory turns out a large number of paper products.The factory turns out _ _ paper products. (quantities of)6. Although they raise the price, hes going to buy the farm.Hes going to buy the farm _ they raise the price.(even if/though)I
34、V. 根据括号内的提示将下列句子翻译成英语。1. 他的粗鲁导致了孩子和他的争吵。(result in)2. 他们不知道这个变化是怎样产生的。(come about)3. 他以优质的服务使生意逐步兴隆起来。(build up)4. 邻居们让他们停止制造噪音, 但他们仍然继续。(keep on)5. 不用担心, 我们已经储藏了很多食物。(quantities of)6. 那个老人瞥了一下他的手表, 然后看了看天空。(glance at)Suggested Answers:1. Dont worry. We have stored quantities of food already.2. They
35、 didnt know how the change had come about.3. He built up his business by good service.4. The neighbours asked them to stop making a noise, but they still kept on.5. Dont worry. We have stored quantities of food already.6. The old man glanced at his watch and then looked at the sky.Step4 Homework1. F
36、inish the Exx in your coaching books.2. Memorize all the new-learned useful words and expressions.板书Unit4 Language Points1. come about 是不及物短语，意为“发生” 。2. result in 导致, 造成= lead toresult from 起因于，由于来源:Zxxk.Com3. consequence 结果；后果；影响in consequence 因此as a consequence 结果as a consequence of 由于的结果4. quanti
37、ties of 大量的当“quantities of / a quantity of + 名词”作主语时，谓语动词的数取决于quantity 的数，而与所修饰的名词无关。5. tend 作不及物动词时，意为“易于” ，构成 tend to do sth. 结构，意为“易于做某事” （句 1） ；“趋向” ，后常接 towards 或 to（句 2） ；“照顾” ，构成 tend to sb. / sth. 结构（句 3） 。作及物动词时，意为“照顾；护理” （句 4、句 5） 。6.There is no doubt that .是固定句型，意为“毫无疑问”There is some doub
38、t whether .主句为肯定句时，doubt 后使用连词 whether。主句为否定句时，doubt后则使用连词 that。7.含蓄虚拟条件句：通过一个介词短语或其他方式表示。常用的词或短语有：without, but for, but that, otherwise, or, but 等。教学反思It is boring to remember the langue points one by one, so teachers should give interesting examples. Whats more, teachers can ask students to create
39、 their own sentences if time is permitted.课题 Unit4 The use of it (2) 课型 Grammar教学目标1. Learn about “it” used for emphasis.2. Help the students learn how to use new words and expressions of this unit and how to use “it” for emphasis.重点难点1. Teach the students how to master the use of “it” for emphasis.
40、2. The structure of “It is . that .”.教具准备 A projector and a blackboard.课时安排 Two教学过程与教学内容 教学方法、教学手 段与学法、学情Step1 RevisionCheck the homework Exx.来源:学科网Step2 Discovering useful structuresT: Next lets turn back to page 29. Well learn a useful structure. Now compare these two sentences below.Show the foll
41、owing two sentences on the screen.Human activity has caused this global warming.It is human activity that has caused this global warming.T: Who can translate them into Chinese?Sa: I think they are the same. They both mean“人类行为引发了全球变暖”.Sb: I dont think so. They are a little bit different. The latter
42、one should be “引发全球变暖的正是人类行为”. In the second sentence, “human activity” is emphasized.T: Quite right. This is the structure we are going to learn today.Present the structure on the screen and give some explanation.(1)由 it 引导的强调句结构:It is (was) + 被强调部分 + that (who) + 句子其他部分注意：此结构强调的成分仅限于主语，宾语和状语。如：原句：
43、My father did the experiment in the lab yesterday evening.强调主语：It was my father who did the experiment in the lab yesterday evening.强调宾语：It was the experiment that my father did in the lab yesterday evening.强调时间：It was yesterday evening that my father did the experiment in the lab. 强调地点：It was in th
44、e lab that my father did the experiment yesterday evening. (2) 强调句的一般疑问句式：Is/Was it + 被强调部分 + that (who) + 句子其他部分 ?(3) 强调句的特殊疑问句式：特殊疑问词+is/was it + that(who)+句子其他部分?(4) notuntil句型的强调句式:It is/was not untilthat 由于否定已经前移，that 后只能用肯定形式。典型例题分析:1）It was last night _ I saw the film Star Wars.A. who B. when
45、 C. that D. whichSummarizing, comparative method; practicing activities答案 C. 强调句的结构是： It + be + 强调部分 + that (who) + 主谓句。强调句的连词只有两个，that 和 who。当强调的部分是人，且为句子的主语时，才用 who，其余用 that。2）It is ten years _ Miss Green returned to Canada.A. that B. when C. since D. as答案 C. 考点是连词用法。 本题易误选为 A. 其实本句不是强调句。若是，去掉 It
46、be . that 还应是一个完整的句子。而本句去掉It is .that，只剩下 ten years Miss Green returned to Canada 不成句。因此本句不是强调句。 It is + 时间 + since ., 其中 is = has been.Step3 Using structuresGet the students to do more exercises about the use of “it” for emphasis.T: Please turn to page 64. Read the instructions of the two exercises
47、 and then finish them.Sample answers to Exercise 2:(1) It was four Australian children who started it in 1996 when they organized the first childrens environmental conference.(2) It is at this conference that we decide which projects we want to work on in the following year.(3) It was through one of
48、 these projects about five years ago that I first became involved in Millennium Kids.Step4 Homework1. Make four sentences with “it” for emphasis.2. Finish the Grammar Exx in your coaching books.板书Unit4 Grammar: the use of it(2)1. 由 it 引导的强调句结构:It is (was) + 被强调部分 + that (who) + 句子其他部分注意：此结构强调的成分仅限于主语，宾语和状语。2. 强调句的一般疑问句式：Is/Was it + 被强调部分 +
