山西省吕梁市高中英语 Module 5 A Lesson in a Lab The Third Period Grammar精品教案 外研版必修1

Module 5 A Lesson in a LabThe Third Period GrammarTeaching goals 教学目标1. Target language 目标语言a. 重点词汇和短语a little, a bit, a lot, rather, no, any, (very) much, lotsb. 重点句式The earth is forty-nine times larger than the moon. P43The earth is forty-nine times as large as the moon. P43Its getting brighter and brighter! P47The closer you are, the more youll see. P47The more books I read, the more information I learn. P472. Ability goals 能力目标Enable the students to learn degrees of comparison and some adverbs used to modify the comparative degree.3. Learning ability goals 学能目标Help the students solve some simple maths problems to practice the degrees of comparison.Teaching important points 教学重点The usages of the comparative degree.Teaching difficult points 教学难点Help the students pay attention to the agreement in comparison objects.Teaching methods 教学方法Question-answer and discussion.Teaching aids 教具准备A computer and a projector.Teaching procedures & ways 教学过程与方式Step RevisionFor the homework, check whether they can read the decimals correctly by following the examples. If they have any problems about this part, help them. For Exercise 15, ask some students to read out their descriptions. Meanwhile, pay attention to whether they have used the function words and expressions in the table.Step Lead-inShow some proverbs to the students and let them guess the meanings of the sentences. And then give them the correct meanings of the sentences.T: Today, well learn the degrees of comparison. At first, lets look at the screen and guess the meanings of the sentences.1. Two heads are better than one.2. More haste, less speed.3. East, west, home is best.4. The best mirror is an old friend.5. Least talk, most work.Students give their answers. And teacher corrects some mistakes if there are any.Sample translations:1.(谚) 两人智慧胜一人。2.(谚) 欲速则不达。3.东跑西跑还是家里最好。4.(谚)老友是宝镜。5.少说话，多干事。T: From these sentences, we know that Degrees of Comparison are used widely in English. Today, well learn some of them.Step Degrees of comparison 1 (P43)In this step, the students will finish Activity 1 and Activity 2 on page 43.Task 1: Activity 1Let the students give some sentences that they have learned with the comparative degree in. And then turn to page 43 and read the first two sentences in Activity 1. Ask them to tell the difference between these sentences.T: Can you give me some sentences with the comparative degree in them?S1: The earth is larger than the moon.S2: Tom is fatter than Mike.S3: She is more beautiful than her sister.T: Right. Whats the difference between these sentences and the one on the blackboard?Write the sentence on the blackboard:The earth is forty-nine times larger than the moon.S4: There are “forty-nine” times before the word “larger”.T: Right. Thats what well learn today. When we want to express degrees of comparison, we can use this structure.A is . times larger (bigger, taller, higher, wider, longer etc.) than B.Write down the structure on the blackboard.T: Its very simple; just add “. times” before the comparative degree. But please note that we say “twice” instead of “two times”. Are you clear?Ss: Yes.T: Now, lets do some easy maths problems. Listen! If Object A is 10 meters long, and Object B is twice longer than Object A, how long is Object B?S5: Twenty meters long.T: Good. Youve understood the structure correctly. The second problem: if Object A weighs 100 kilogrammes, and Object B is four times heavier, how heavy is Object B?S6: 400 kilogrammes.T: Why?S6: Because Object B is four times heavier than Object A.T: OK. Besides this structure, we can use another structure to express the same meaning. That is:A is . times as large (big, tall, long etc.) as B.Write down the structure on the blackboard.T: Well, lets go on to do some maths problems.Task 2: Activity 2Read the instruction of Activity 2, and let the students read the sentences in Example. After that, ask them to finish the following 5 problems.T: The purpose of the task is not to check your intelligence, because I believe that all of you have high IQ. Its about the uses of the two structures weve just learnt. Now, finish the task and then check your answers with your partners. Remember you must use both of the structures to practice what weve just learned.After a while, ask four students to read out their answers in complete sentences.S1: I think winter in Harbin is four times colder than Beijing. Or, winter in Harbin is four times as cold as Beijing.T: The structure is right, but there are mistakes in the two sentences. Who can correct the mistakes and read out a complete sentence?S2: It should be “Winter in Harbin is four times colder than that in Beijing.”T: Right. When we are using the comparative degree，we must pay attention to the two comparison objects. Now who would like to do the third one?S3: Miss Wu, can we say that “in winter the temperature of Harbin is four times lower than in Beijing”?T: Thats a good sentence, but also you should pay attention to the two comparison objects. We should say that “In winter the temperature of Harbin is four times lower than that of Beijing.”Write down the two sentences on the blackboard, so that the students can clearly know the agreement in two comparison objects.T: Are you clear? OK, how about the third problem?S4: I think Mount Qumolangma is about six times higher than Mount Tai. Or, Mount Qumolangma is about six times as high as Mount Tai.S5: My aunts house is twice as large as my house. Or, my aunts house is twice larger than my house.S6: Tom weighs over twice as heavy as Lily. Or, Tom is over twice heavier than Lily.Step Degrees of comparison 2 (P47)Task 1: Activity 1T: Now, please finish the sentences on the screen, using proper words and the structure.Show the sentences on the screen.bright dark heavy weak fat1. When the sun rises, it is getting _.2. When the sun sets, its getting _.3. When the rush hour comes, the traffic is getting _.4. After suffering a long disease, he is getting _.5. She likes to eat sweet, and these days she is getting _.Read out the first part of each sentence, and let the students read and finish the second part of the sentence.Sample answers:1. brighter and brighter2. darker and darker3. heavier and heavier4. weaker and weaker5. fatter and fatterT: Now, we are going to learn another structure. Suppose you save a millionaires life, and he offers you money to thank you, and asks you: “How much do you want?” And suppose you are a greedy person. What will you say?S1: The more, the better.T: Yeah, you are so clever. Its a real bargain. But if he also wants you to share his pains, and asks you “How much do you want?”, what will you say?S2: The less, the better.T: Ha! Youre clever. But there cant be such an easy thing in the world. No pains, no gains. If you gain what you shouldnt gain, that would be a disaster. Now, please look at the three sentences on the screen:1. Its getting brighter and brighter!2. The close you are, the more youll see.3. The more books I read, the more information I learn.T: Do you know the meanings of these sentences?Ss: Yes.T: OK, now, please answer my questions. Question 1: Which of these structures is used to say that something is changing?S3: All of the structures are used to say that something is changing.T: Question 2: Which of these structures is used to say that things change / are changing together?S4: The second and the third ones are used to say that things change / are changing together.T: Question 3: Which structure repeats the same adjective?S5: The first one repeats the same adjective.T: Good. Now, lets practice the structure. Please look at Activity 2 on page 47. Use the words below to write sentences as in the example. Who would like to finish Sentence 1?S6: The hot metal gets bigger and bigger.S7: Miss Wu, can we say that “The hot metal is getting bigger and bigger.”?T: I think you can do it. They have the same meaning. Now, lets finish the next three sentences. Can you three finish the sentences one by one?S: .By now the students have learned 4 structures about degrees of comparison, including:1. The earth is forty-nine times as large as the moon.2. The earth is forty-nine times larger than the moon.3. Its getting brighter and brighter.4. The closer you are, the more youll see.Show the sentences on the screen to let the students have a revision.T: Now, please look at the screen. By now, weve learned four useful structures about degrees of comparison. Please turn to page 91. Lets practice these structures. I will give you 3 minutes or so to finish Exercises 1 and 2.Three minutes later. Check the answers with the whol