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    高中英语Unit 1 Food for thought教学设计及反思

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    这是一份高中英语Unit 1 Food for thought教学设计及反思,共13页。教案主要包含了be able t,have t,had better,dare & need等内容,欢迎下载使用。

    新外研社(19)高中英语必修二
    Unit 1 Food for thought--Using Language公开课教案
    Teaching objectives:
    1.Enable students to understand the functional meanings of modal verbs and choose appropriate modal verbs according to the context;
    2.Lead students to practise the exercises related to modal verbs;
    3.Guide students to talk about related diet problems using grammar properly;
    4.Help students to raise their awareness of healthy diet and develop physical quality.
    Evaluation objectives:
    1. Ask students to find out the sentences with modals and translate them to find out whether they can understand their meanings.
    2. Ask students to do exercises on Page5 to check whether they can know the usage of modals.
    3. Ask students to finish the exercises on learning plan papers to check whether they have mastered the usage of modals.
    Teaching key and difficult points:
    1. Lead students to understand the ideographic function of“be able to, had better, have to, dare not”and master conjecture of modal verbs.
    2. Use the modals properly.
    Teaching methods:
    Cooperative Teaching Method, Task-based Approach, Communicative Approach.
    Teaching procedures:
    Step1 Lead-in
    Hello!Boys and girls. Today we’ll learn something about modals. I think you have got to know something about modals in your learning.Let’s check how how you are getting along with this grammar.First, please find out all the sentences with modals in the passage A Child of Two Cuisines and analyze the function of them.
    Activity 1: Find out the sentences with modals in the reading passage
    Suggested answers:
    ①...I was able to hold a knife and fork—and chopsticks! 
    ②But there are still some dishes that Dad dare not try even after many years of marriage to my mother. 
    ③...Mum and I just have to find a way to get him into the kitchen! 
    ④...we’d better not eat too much roast food as it may make us suffer from heat inside our bodies,... 
    ⑤“You needn’t try it if you don’t want to,” Mum said,...
    Step 2:
    Activity 2: Fill in the blanks by using correct modal verbs
    T:Now you have found out all the sentences with modals. Let’s have a try to fill in the blanks by using modals.
    ①...I       hold a knife and fork—and chopsticks! 
    ②But there are still some dishes that Dad      try even after many years of marriage to my mother. 
    ③...Mum and I just       find a way to get him into the kitchen! 
    ④...we        not eat too much roast food as it may make us suffer from heat inside our bodies,... 
    ⑤“You       try it if you don’t want to,” Mum said,... 
    Suggested answers:
    ①was able to ② dare not ③have to ④had better ⑤needn’t
    T:Now, please read the sentences in Activity 2 and answer the questions.
    1. What are modal verbs?
    2. What are the characteristics of modal verbs?
    1.情态动词表示说话人的某种语气或情绪,如可能、意愿、猜测、义务、需要等。
    2.情态动词的特征:有一定的词义,但不能单独作谓语,后面接动词原形;没有人称和数的变化(have to除外);有些情态动词有过去式,如:can—could,may—might,will—would,dare—dared,have to—had to等。
    1.be afraid to do something②
    2.not be necessary to do something⑤
    3.give advice to do or not to do something④
    4.be necessary or give strong advice to do something③
    5.have the ability to do something①
    T:Now let’s learn some relevant knowledge about this Grammar.
    *总结归纳:几种常见情态动词的用法
    Step 3:
    Activity 3: Learning of modal verbs
    一、be able to
    1.be able to 后接动词原形,表示某人有做某事的能力,与can的用法相近。如:
    I am able to speak English.我能讲英语。
    2.be able to 与can的辨析:
    ①be able to有多种时态,如: was/were able to,will/ shall be able to,have/has been able to等,而can只有两种时态,即can和could。
    ②be able to 强调通过努力而获得的能力,而can则强调自身已具有的能力。如:
    She can sing the song in English.
    她能用英语唱这首歌。
    He will be able to sing this song in English in a few hours,too.
    几小时之后,他也能用英语唱这首歌。
    ③be able to 强调一种结果,而can只强调一种可能。如:
    Luckily,he was able to escape from the big fire in the end.
    幸运的是,他终于逃出了大火。
    If he had got here a few hours earlier,I could have saved him.
    要是他早几小时来,我还能救他。
    ④be able to的否定形式是在be后面直接加not,即be not able to;be able to可用在may/might之后。如:
    The kid is not able to write.
    这孩子不会写字。
    But we may not be able to do this for every scenario.
    但是我们不能每一种场景下都这么做。
    即时训练:选词填空 (can/be able to)
    ①He might      fix your car. 
    ②When I was young,I    climb any tree in the woods. 
    ③In today’s information age,the loss of data    cause serious problems for a company. 
    ④Father spent a few hours talking to him.At last he     drop the silly idea. 
    二、have to
    ①have to和must的意义相近,只是must侧重表示说话人的主观看法,而have to则表示客观需要,如:
    I must study hard.我必须努力学习。
    You have to hand in your compositions before next Monday.
    你必须在下周一前上交你的作文。
    ②have to 的否定形式是don’t have to,相当于needn’t,如:
    They don’t have to buy a computer at present.
    他们目前没有必要买电脑。
    ③have to 有人称、数和时态的变化,如:
    They had to speed up,for the weather turned terrible.
    他们必须加快速度,因为天气变糟了。
    He has to stay at home because of illness.
    因为生病,他不得不待在家里。
    *must表示义务、必要性、命令等,意为“必须,应该”,更强调主观态度。
    must用于一般疑问句时,其肯定答语应用“Yes,you must.”。其否定答语应用“No,you needn’t.”或“No,you don’t have to.”。must的否定式为must not/mustn’t,表示禁止。
    即时训练:完成句子
    ①I         here because I have no umbrella with me. 
    我不得不在这儿等,因为我没带伞。
    ②You          smoke here. 
    这儿禁止吸烟。
    ③We          hurry,for there’s plenty of time. 
    我们不必着急,因为时间很充裕。
    ④We           home by 11 o’clock. 
    我们必须在11点以前到家。
    三、had better
    had better 后跟动词原形,表示“最好……”,其否定式在had better后加not。构成疑问句时,则通常将had (而不是had better)置于主语之前。
    即时训练:翻译句子
    ①你最好别去打扰他。
    ________________________________________________
    ②我们最好在天黑前到达那里。
    _________________________________________________
    ③你最好在10点前完成你的家庭作业。
    _________________________________________________
    ④医生是不是去看看他比较好?
    _________________________________________________
    四、dare & need
    1.dare既可作情态动词,又可作实义动词。作情态动词时,通常用于否定句、疑问句和条件状语从句中,一般不用在肯定句中。
    即时训练1:完成句子
    ①She          go out alone at night. 
    她晚上不敢独自出门。
    ②How       she do things like that to me? 
    她怎么敢对我做那样的事呢?
    ③He asked me if I       ride a horse. 
    他问我是否敢骑马。
    dare作实义动词时,有时态、人称和数的变化。不同的是,作实义动词时,在肯定句中dare后面通常接带to的不定式;在否定句和疑问句中,dare后可接带to或不带to的不定式。
    即时训练2:完成句子
    ①He     speak English at any time. 
    任何时候他都敢说英语。
    ②I wonder how he     say such things. 
    我纳闷他怎么竟敢说出这样的话来。
    ③He     answer. 
    他不敢回答。
    ④How     you go into the lab without your teacher’s permission? 
    未经你老师允许,你怎么敢进实验室?
    2.need作情态动词时,后跟动词原形,表示“需要,有必要”,无人称和数的变化,多用于否定句、疑问句或条件句中。
    (2018·全国卷Ⅰ)If you are time poor,you need run for only half the time to get the same benefits as other sports.
    如果你时间不充裕,你只需要跑一半的时间就可以获得和其他运动同样的效果。
    need作为实义动词时,通常用法是:
    (1)人+need+to do
    (2)物+need+doing
    (3)物+need+to be done
    注意对need问句的回答:
    —Need I finish the work today?
    —Yes,you must./No,you needn’t/No,you don’t have to.
    Needn’t对其他情态动词问句的回答:
    —Shall I tell John about it?
    —No,you needn’t/don’t have to.
    —Must we do it now?
    —No,you needn’t/don’t have to.
    即时训练3:完成句子
    ①We     get enough help. 
    我们需要大量的帮助。
    ②The room needs cleaning.
    The room     cleaned. 
    房间需要打扫了。
    ③    now are books. 
    他现在需要的是书籍。
    ④He     about it. 
    这件事他无须担心。
    Suggested answers:
    一、①be able to ②could ③can ④was able to
    二、①have to wait  ②mustn’t ③don’t have to ④must be
    三、①You’d better not disturb him.
    ②We had better get there before it gets dark.
    ③You’d better finish your homework before 10 o’clock.
    ④Hadn’t the doctor better see him?
    四、即时训练1
    ①dare not ②dare ③dare
    即时训练2
    ①dares to ②dares (to) ③does not dare (to) ④dare
    即时训练3
    ①need to ②needs to be ③What he needs ④needn’t worry
    Step 4:
    Activity 4:Conjecture of modal verbs
    1.can用于肯定句中表示客观的可能性,意为“有时会”;用于疑问句中可以表示推测,意为“可能”,有时表示一种惊讶的语气;用于否定句中也可以表示推测,can’t意为“不可能”,语气很强烈。
    2.may/might用于肯定句中可以用来表示不十分肯定的推测,意为“有可能”;用于否定句中也可以表示推测,may not意为“可能不”,表示一种不太确定的语气。
    3.must表示推测时只能用于肯定句中,意为“一定,必定”,表示十分肯定的语气(在疑问句中或否定句中要用can/could)。
    4.should用来表示推测时意为“应该”,即含有“按道理来说应当如此”的意思。
    情态动词+动词原形
    表示对现在或将来的推测
    情态动词+be +doing
    表示对某刻正在发生的动作的推测
    “情态动词+have done”的用法
    情态动词+have done
    用法
    must have done
    一定做过某事,其否定形式为can’t/couldn’t have done
    can/could have done
    1.本来能够做某事却未做
    2.可能做过某事
    Can’t/couldn’t have done
    不可能做过某事
    may/might have done
    或许/可能做过某事
    should/ought to
    have done
    本该做某事却未做,其否定形式表示本不该做某事却做了
    Needn’t have done
    做了本没有必要做的事情

    即时训练1:翻译句子
    ①他准是个美国人。
    ____________________________________________________
    ②他肯定正在教室里做练习。
    ____________________________________________________
    ③他不可能知道我的地址。
    ____________________________________________________
    ④昨晚一定下雨了,是不是?
    _____________________________________________________
    即时训练2:单句语法填空
    ①You’d better put on a heavy coat.Sometimes it     be very cold here at night. 
    ②It     be the vocabulary that caused you the problem in the exercise because you know a lot of words. 
    ③—Good morning.I’ve got an appointment with Miss Smith in the Personnel Department.
    —Ah,good morning.You     be Mrs.Peters. 
    ④You     have hurried.I have lots of time. 
    即时训练3:单项填空
    ①—She looks very happy.She     have passed the exam.  
    —I guess so.It’s not difficult after all.    
    A.should B.could C.must D.might
    ②—How’s your tour around the North Lake? Is it beautiful?
    —It     be, but it is now heavily polluted. 
    A.will B.would C.should D.must
    ③There     be any difficulty about passing the road test since you have practiced a lot in the driving school. 
    A.mustn’t B.shan’t C.shouldn’t D.needn’t
    ④You     be hungry already.You had lunch only two hours ago! 
    A.wouldn’t B.can’t C.mustn’t D.needn’t
    ⑤—I’m sorry.I    at you the other day. 
    —Forget it.I was a bit out of control myself.
    A.shouldn’t shout
    B.shouldn’t have shouted
    C.mustn’t shout
    D.mustn’t have shouted
    ⑥Thank you for all your hard work last night,I don’t think we    it without you. 
    A.can manage B.could have managed
    C.could manage D.can have managed
    Suggested answers:
    即时训练1
    ①He must be an American.
    ②He must be doing his exercises in the classroom.
    ③He can’t know my address.
    ④It must have rained last night,didn’t it?
    即时训练2
    ①can ②couldn’t ③ must ④needn’t have
    即时训练3
    ①—⑥:CCCBBB
    Step 5:
    Activity 5: Consolidation
    1.Fill in the blanks
    ①The fire spread through the hotel very quickly,but everyone     get out. 
    ②Since it is raining,we     stay indoors. 
    ③You     finish your work before you go home. 
    ④You    worry about situations like these if you have good social skills. 
    ⑤I     know what I can talk about with the Chinese people that I meet. 
    2.Finish the passage
    Miss Fang    not read for very long with her eyes hurt.Her mother told her that she     go to hospital and see a doctor.“You     see a doctor as soon as possible,” her mother said. 
    When Miss Fang had free time,she went to hospital.The clerk said that the doctor     see her at 3:30. 
    Miss Fang replied that she would not     be there at 3:30,because she     have an important test then.She asked the clerk if she     arrange the examination at about ten tomorrow. 
    Suggested answers:
    1.①was able to ②have to ③had better ④needn’t ⑤need to
    2.Miss Fang could not read for very long with her eyes hurt.Her mother told her that she should go to hospital and see a doctor.“You had better see a doctor as soon as possible,” her mother said. 
    When Miss Fang had free time,she went to hospital.The clerk said that the doctor could see her at 3:30.
    Miss Fang replied that she would not be able to be there at 3:30,because she had to have an important test then.She asked the clerk if she could arrange the examination at about ten tomorrow. 
    Step 6:
    Activity 6: Production
    Micro-writing:
    假设你是汤姆的好朋友李华,最近通过电子邮件得知他在健康方面遇到了困惑,请给他回复电子邮件,提出一些保持健康方面的建议。
    要点如下:
    1.健康很重要;
    2.保持均衡饮食和身心健康;
    3.坚持每天锻炼的重要性。
    注意:1.词数80左右;
    2.用上所学的情态动词。
    Suggested answer;
    Dear Tom, 
    I’m sorry to hear that you have trouble in keeping healthy.Everyone shouldn’t ignore health,whether he is poor or wealthy.Health is the most important thing.
    Firstly,I think it’s necessary that we should keep a balanced diet,so we’d better eat some fresh fruit and vegetables every day.As a senior high student,we should have breakfast on time every day and shouldn’t eat more at night.At the same time,keeping a good state of mind is also very important.We should keep an optimistic mind to everything and forget the unhappy things.
    What’s more,we should take exercise every day to make sure that we are energetic.Only in these ways can we live a healthy and happy life.In a word,keeping healthy eating habits is beneficial to us.
    Best wishes. 
    Yours,
    Li Hua 
    Step 7:
    Activity 7: Summary
    Suggested answer:
    What have we learnt this class?Let’s have a summary.


      情态动词表推测
    1.情态动词+动词原形  表示对现在或将来的推测
    2.情态动词+be+doing 表示对某刻正在发生的动作的推测
    3.情态动词+have+done 表示对过去的推测,如下所示:
    1)must have done 过去肯定做了
    2)may/might have done 过去可能做了(小于must)
    3)can’t/couldn’t have
    done 过去不可能做了
    4)could have done 过去本来可以做却未做
    5)should/ought to have done 本应该做却未做
    6)needn’t have done 本不必做却做了(与didn’t need to区别)


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