英语外研版必修3Module4《Sandstorms in Asia》教案Period 3.doc

Period 3Grammar 1; Grammar 2; Pronunciation and Function整体设计教材分析本节是语法课, 针对的是汉语中没有的语法现象: 不定式和but+不定式。教师可以先让学生通过例句总结出不定式的形式和用法。分组讨论分析的方法可以使学生在课堂上积极参与而不是被动的记忆一些语法条目。同时应该在学生了解何为不定式之后设计一些对应的练习来加深印象并记住用法。语音和功能部分与语法部分相关, 放在本节处理, 便于学生类比记忆。三维目标1. 知识与技能1)Make students learn to sum up grammatical rules by themselves.2)Make sure students master the grammatical items.3)Express strong feelings through special sentence patterns.2. 过程与方法1)Motivate students enthusiasm in taking part in the class.2)Try to think in a negative way when express feelings with negative sentences.3. 情感与价值Through the study of this period students will surely know more about different types of infinitive.教学重点1. Encourage students to sum up grammatical rules.2. Encourage students to think in the English way.教学难点1. The definitions of different forms of infinitive and how to use them.2. How to think in the English way.教学方法1. Individual work and pair work to make every student work in class.2. Deduction.3. Practice.教学过程 Step 1 RevisionRevise what we have learned last class. Do some multiple choice questions about the passage learnt.(Show the following on the screen. )1. What is the best description about a sandstorm according to the passage?A. It is a major disaster for many Asian countries for centuries.B. It is a strong wind carrying sand.C. It is a way to cause land to become desert.D. It is a kind of natural disaster that cant be treated.2. What is the main reason for the increase of sandstorm in China recently?A. To be close to many deserts.B. The worsening of the weather in China.C. It is a result of desertification.D. People cutting down trees and digging up grass.3. What effects are sandstorms bringing to people living in cities?A. The whole city is usually covered by thick and yellow dust.B. Traffic moves very slowly.C. People cant breathe well and the dust make them ill.D. All above.4. What is the best way to avoid the effects from the sandstorm?A. To live far away from deserts.B. To stay at home when a sandstorm happens.C. To wear mask if you want to go out.D. To plant more trees.5. Which of the following is not the elements to make Central Asia, North America, Central Africa and Australia the four main places where there are sandstorms?A. The climate in these places is rather bad.B. They are all the places with big deserts.C. The natural environment in these places is worsening every year.D. The governments in these places paid little attention to the protection of nature.Suggested answers:1. B2. C3. D4. D5. D Step 2 Grammar 11. In this period we are going to talk about the infinitive.(Show the following sentences on the screen if possible. )Paraphrase them by using the infinitive.1)The wind is strong enough. It can move sand dunes.2)We were advised, “Dont go outside. ”3)Im cycling to work in a sandstorm and its frightening.4)There is nothing anyone can do.5)I am the only person in my family who has been in a sandstorm.6)Ive been caught in a sandstorm. It was a terrible experience.Suggested answers:1)The wind is strong enough to move sand dunes.2)We were advised not to go outside.3)Its frightening to be cycling to work in a sandstorm.4)There is nothing to be done.5)I am the only person in my family to have been in a sandstorm.6)To have been caught in a sandstorm was a terrible experience.2.Option OneAsk students to sum up the different types of infinitive.Write the following on the blackboard.形式时间概念语态to do/do与谓语动词同时发生或发生在谓语动词之后主动Give students several minutes to fill in the form.Suggested answers:形式时间概念语态to do/do与谓语动词同时发生或发生在谓语动词之后主动to be doing与谓语动词同时发生, 动作在进行主动to have done发生在谓语动词之前主动to be done与谓语动词同时发生或发生在谓语动词之后被动to have been done发生在谓语动词之前被动Let students read the above sentences silently and try to understand different types of infinitive and can use them correctly.Option TwoShow the grammar rules on the screen and let students understand them.不定式的各种形式动词不定式是一种非限定动词, 仍具有动词的一般特征, 有一般式、进行式、完成式。现分别介绍如下:1. 动词不定式的一般式: to do/doI am glad to see you here.很高兴在这儿见到你。She decided not to accept his present.她决定不接受他的礼物。To love and to be loved is the greatest happiness of life.有所爱而且也被人爱是人生一大幸福。2. 动词不定式的进行式: to be doingIt is wrong to be always thinking of yourself.老是考虑你自己是错误的。You dont need to be working in such a big hurry, for theres plenty of time.你现在不必这样匆匆忙忙地干, 有的是时间。The students pretended to be listening to the teacher carefully.学生们假装在专心听老师讲课。3. 动词不定式的完成式to have doneIm sorry to have troubled you so much.对不起, 给你添了这么多麻烦。He is said to have been living here for twenty years.据说他已经在这儿住了20年时间了。It is a great honor to have been invited to visit this country.应邀来这个国家访问我感到很荣幸。I feel it an honor to have been given a chance to study here.有机会来这里学习我感到非常荣幸。4. 不定式的复合结构It is not hard for one to do a bit of good. (主语) 一个人做点好事并不难。This problem is for you to deal with. (表语)这个问题该由你来处理。The sun warms the earth, which makes it possible for plants to grow. (作宾语)太阳晒热大地, 从而使植物得以生长。He opened the window for the fresh air to come in. (作状语)他打开窗子好让新鲜空气进来。There is a lot of work for you to do. (定语)你有很多工作要做。Had better have students discover some rules by themselves before explaining to them as follows.3. Consolidate the infinitive and make sure that students can use different types of infinitive.Ask students to finish Activities 2 and 3 individually, and then check their answers with their partners. Then ask some students to share their answers with the whole class.（Show the following on the screen. ）1. Im traveling during a sandstorm. Its dangerous.Its dangerous to_ .2. Experts hope that they will learn more about the movement of thunderstorms.Experts hope to_ .3. We were told, “Dont leave the house. ”We were told not_ .4. The men need to complete the work on the house by the end of the week.The work on the house needs to_ .5. It seems that most houses have been destroyed by the storm.Most houses seem to_ .Ask students to answer the questions.Suggested answers:1. travel during a sandstorm2. learn more about the movement of thunderstorms3. to leave the house4. be completed by the end of the week5. to have been destroyed by the storm（Show the following on the screen. ）1. Its frightening_ (walk)in the road in a sandstorm. I hope I reach home soon.2. Experts hope_ (learn)more about the movement of thunderstorms.3. Id like_ (tell)about the situation before now.4. The work needs_ (complete)by the end of the week.5. My father was out of the city when the sandstorm came. He was very glad_ (miss)it.6. The building has_ (finish)by the end of this year.7._ (see)a real sandstorm was very frightening.Suggested answers:1. to walk2. to learn3. to be told4. to be completed5. to have missed6. to be finished7. To seeFrom the above exercises try to master their meanings and can use them in sentences correctly and properly. Step 3 Grammar 21. Now, well learn a special infinitive: but+infinitive.Look at the words and phrases in bold in these sentences.（Show the following on the screen. ）Answer the questions below.aAnd yet we do nothing but talk about it.bI cant help but feel very concerned.cI cant but wonder what will happen.1 Which word or phrase means except?2 Which word or phrase means I have to?3 What part of the verb follows the words in bold?Give students a few minutes and then call back their answers.Suggested answers:1 but2 cant help but and cant but3 the infinitive without “to”2. (Show the following on the screen. )短语but+不定式介词but后面跟不定式的情况有以下几种:1. cant help but+原形动词。例如:Hearing the news, I could not help but cry.听到这一消息, 我忍不住哭了起来。As a soldier, I cannot help but obey the order.作为一个军人, 我只能服从命令。2. do+anything/nothing/everything+动词原形。例如:He does nothing but complain.他只是一个劲地抱怨。My dog does everything but speak.我的狗除了不会说话以外什么都会。Cant you do anything but ask silly questions?你别一个劲地提愚蠢的问题好吗？3. Next, encourage students to finish Activity 2 on Page 36 in pairs, and then ask some students to give the answers.Underline the correct answer.1. I cant help/but hope that they will succeed.2. I cant help but think/to think that it was a mistake.3. I cant chose/choose but do it.4. He does nothing but complaining/complain.5. I cant help but to love/love her.6. The workers do nothing/not but drink tea and talk to each other.Give students a few minutes and then call back their answers.Suggested answers:1. but2. think3. choose4. complain5. love6. nothing Step 4 Pronunciation and Function1. Please look at pronunciation and function.In this class, well learn how to express strong opinions.Do you know how to express your agreement or disagreement?Collect students answers on the blackboard.1. I agree with you.2. I support you.3. You are absolutely right.Well done! Today well learn some other ways.2. First, listen to the following sentences, and underline the words the speaker stresses.（Show the following on the screen. ）I couldnt agree with you more.I think youre absolutely right.Its extremely serious.Ask a volunteer to share his or her answers.Suggested answers:I couldnt agree with you more.I think youre absolutely right.Its extremely serious.Ask students to read the three sentences. Then play the tape again for students to follow, paying attention to the stressed words.3. Listen to this part and decide which words the speaker will stress.I have no idea.It couldnt be worse.Its absolutely hopeless.Suggested answers:I have no idea.It couldnt be worse.Its absolutely hopeless.4. Ask students to complete the sentences individually, and then check with a partner. After that, ask some pairs to share their answers with the whole class. (Show the following on the screen. )Complete the sentences using the above expressions.1. A: We need to plant more trees.B:_ 2._ The traffic in this city just doesnt move.3. A: People dont care enough about the environment.B:_ 4._ I cant see anything. Theres sand everywhere.Suggested answers:1. I couldnt agree with you more. /I think youre absolutely right.2. It couldnt be worse. /Its absolutely hopeless.3. I couldnt agree with you more. /I think youre absolutely right.4. It