2019新人教高中英语选择性必修三Unit2Healthy Lifestyle--Discover Useful Structures公开课教案.docx

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1、2019新人教高中英语选择性必修三Unit2 Healthy LifestyleDiscover Useful Structures 公开课教案Teaching aims:1 .Enable students to master the usage of the infinitive as the subject.2 .Guide students to use the relevant grammar flexibly and authentically in real situations.3 .Help students to understand the difference betw

2、een the infinitive as the subject and the v-ing form as the subject.Teaching key points:1. Help students identify the usage of the infinitive as the subject.2. Guide students to use the infinitive as the subject to express their own ideas.3. Design specific situations for students to make use of the

3、 infinitive as the subject.Teaching difficult points:How to use the infinitive as the subject in real situations.Teaching procedures:SteplSLead-inActivity 1 Look at the following sentences and pay attention to the italicized infinitives,and tell their meanings and functions.1.7b change bad habits is

4、 never easy.2.It took the surgeon three hours to finish my mothers lung surgery.3.To join the Peoples Liberation Army,it is required for men to shave off their beards.4.It was not polite to disturb your neighbours with loud music last night.The infinitive in each sentence functions as .Summary l:mea

5、nings and functions of the infinitive of the verb as the subject.Suggested answer:Summary 1:动词不定式在句中作主语，有时为了保持句子的平衡,避免头重脚轻，常用it作形式主语，而真正的主语放在句子的末尾。比如第2、3、4例句。Activity 2 Find more infinitives in the reading passage.Suggested answers:1.1 can be easy for some of them to form bad habits.2 .After all,it

6、is not easy to break bad habits.Step团 Self-directed studyActivity 1 Fill in the blanks using the right form of the word,and try to change it into another sentence pattern.3 .lt is important Tom to get that job.It is kind you to help me with my homework.2 . (talk) with him is a greatpleasure.-Itis .3

7、 .(help) others is our duty.玲.1 .lt took Tom 2 hours .(作准备)Suggested answers:Activity 1l.for;of2 .To talk;a great pleasure to talk with him3 .To help;lt is our duty to help others4.to make preparationsSummary 2:不定式作主语,it作形式主语的常见结构：例1It is easy for me to learn how to drive.学开车对我来说很轻松。It is clever of

8、you to apply for the position.你申请这个职位真是明智的。例2It is our duty to take care of you.照顾你是我们的责任。It takes me half an hour to do my housework.我花了半个小时估攵家务。Activity 2 Compare the two sentences below and tell the difference in meaning.1 .To look after children is her job tod ay .她今天的工作是看孩子。2 .Looking after chi

9、ldren is her work她的工作是照顾孩子。Summary 3:不定式作主语和动词-/力g形式作主语和动词的区别：Suggested answers:Summary 3:动词-/力g形式和不定式作主语都是说明一个内容。不定式通常表 示一个将来的、具体的内容;而动词形式则表示一种经常性的、习惯的或抽象 的概念。More examples:Smoking is prohibited here.这里禁止抽烟。（抽象）It is not very good for you to smoke so much,你抽这么多烟对你身体很不好。 （具体）Climbing mountains is in

10、teresting.爬山很有趣。（已知的事或经验）To finish the task will take a long time,要完成这项任务将要花费很长时间。侏 完成的事或目的）Step 团 Complete the sentences.Join the words to make full sentences using the infinitive.1.1 mportant/avoid/passive cigarette smoking.2 .will take/nutrition specialist/a balanced diet menu/make/an hour/for yo

11、u.3 .useful/turn to/fitness consultant/for advice4.illegal/dangerous/take/drugs5.harmful/skip breakfast/oftenSuggested answers:l.lt is important to avoid passive cigarette smoking.2.It will take a nutrition specialist an hour to make a balanced diet menu for you.3.It is useful to turn to fitness con

12、sultant for advice.4.lt is illegal and dangerous to take drugs.5.It is harmful to often skip breakfast.Summary 4:1 .单个不定式作主语，谓语动词单数.2 .不定式作主语时,可以用it作形式主语.Step团 Analyse the sentence patternsActivity 1 Fill in the blanks.3 .Sometimes it/s better (remain) silent.4 .Although is a hard task to protect th

13、e environment,we cant help but go ahead.5 .(control) the air pollution is necessary.6 .lt was foolish him to endanger his life in that way.5 .Dont you think it is rude him to ask a lady her age?6 .It is difficult him to live on such a small salary.Summary 5:1.如果要说明不定式表示的动作是谁做的，可以在不定式前加一个由for/of 引起的短

14、语，构成 O2.It is+ad/.+for sb to do(修饰物的形容词)(ad/. :easy,difficult,comfortable,pleasant,light,dangerous,tiresomejnteresting,he avy,fit)It is+adj.+ of sb to do(修饰人的形容词)(ac(/.：kind/good,nicezwise,unwise/clever,silly,stupid,foolish,carelesszrude,polite,n aughty)Suggested answers:Activity 1l.to remain 2.it 3

15、.To control/Controlling 4.of 5.of 6,forSummary 5:不定式的复合结构Activity 2 Complete the conversation with the correct forms of the phrases in the box.begin with be in control of make a choicedecide on make up ones mind1 .A:Hello,doctor.l want to lose weight,but I just cant seem to do it.What can you do to

16、help me?B:Well,first,it/s necessary to what you eat.Cut out all fatty food and sugary drinks,and eat more fruit and vegetables.2 .A:I really need to a way to exercise more.I could use a fitness app,but my phones full.B:So delete a few files.Km sure the app doesnt take up much space.3 .A:Before exerc

17、ising,always do a few warm-ups to .B:l know.But then I always feel too tired to continue!4 .A:Should I go for the pizza or the fried chicken?l hate like these.You know what Im going to eat both!B:Wow! Don/t eat too much junk foodyoull get fat. Ive actually to go on a diet,so Ill just stick to the fr

18、uit salad.Suggested answers:1 .be in control of 2.decide on 3.begin with 4.to make choices;made up my mindActivity 3 Complete the sentences using the correct forms of the words.2 .(lean) out of the window is dangerous.3 .(save) money now seems impossible.4 .It is an offence (drop) litter in the stre

19、et.5 .lt is stupid of you (write) down everything that the teacher says.5 .(say) is one thing and to do is another.6 .It seemed a pity (waste) so much time.1.1 dont think (你问 是不礼貌的)how long the interview will last.8 .(保卫 是我们的职责)the country against its enemies.9 .(花了我半个小时)to wash the clothes.Suggeste

20、d answers:1 .To lean 2.To save 3.to drop 4.to write 5.To say 6.to have wasted 7.it is impolite of you to ask 8.Its our duty to defend 9.It took me half an hourStep 因 Practice1.1 like eating fried tomatoes with eggs,and I thought it must be easy (cook).2.It was so good (feel) accepted for what Im goo

21、d at.3.Its my first time(hear) Chinese stories told by an English speaker.4.Then we will know how important is to have meaning in our life.5.It is not a simple matter(determine) the nature of talent.6.(learn) to think critically is an important skill todays children will need for the future.7.On our way to the house,it was raining so hard that we couldnt help wondering how long it would take (get) there.Suggested answers:l.to cook 2.to feel 3.to hear 4.it 5.to determine 6.Learning 7.to get