1、人教选择性必修第三册 Unit 1 Discover Useful Structures学习目标学习目标12To understand the function and meaning of infinitives used as predicative To learn to use infinitives correctly 目标一：目标一：To understand the function and meaning of infinitives used as predicativeActivity 1:Read these sentences and fill in the blank
2、s using the correct words from the text on pages 2 and 3.1.Perhaps the best _ to understand Western art is to look at the development of Western painting over the centuries.2.During the Middle Ages,the _ of Western art was to teach people about Christianity.3.In his work,Monets _ was to convey the l
3、ight and movement in the scene 4._ was no longer show reality,but instead to ask the question,“What is art?”way purpose aim What they attempted to do Activity 2:Discuss with your partner the common point of the phrases italicised.主主系系表表 the best way to understand Western artisto look,the purpose of
4、Western artwasto teach,Monets aimwasto convey What they attempted to dowas(to)show They are all predicative in the sentence.They all consist of infinitive pattern.动词不定式（短语）作表语相当于名词作表语。它和主语处在同等地位，所指的或是和主语一样的东西，或是主语产生的结果。常常可以将主、表交换位置，句子的意义不变。Definition of Infinitive动词不定式（短语）作表语Activity 3:Match the sen
5、tence halves and underline the nouns or clauses used as the subject in each sentence.1.The young singers intention of performing the song was2.The best way to do business is3.What the survivors attempted to do was4.The main purpose of art education in schools is5.The aim of the two leaders at the co
6、nference was6.For a humble perpon,one of the hardest things might be7.When you are faced with a serious decision,my suggestion is8.The mother believes her duty is9.All he wanted after a tiring day wasA.to build trust between you and your client.B.to achieve permanent peace between their two countrie
7、s.C.to build a memorial to the heroes who saved their lives.D.to share his love for rock music with his fans.E.to be left alone.F.to criticise other people.G.to inspire students to be creative.H.to listen to your own inner voice.I.to raise her son to become a man with a noble mind and a generous hea
8、rt.Summarise the commonalities of these keywords Summarise the function of infinitives used as predicative1.主语是以intention,way,aim,things,duty,suggestion,duty,hope,idea,plan等为中心的名词词组时，或者以what引导的名词性分句表 示，一般用动词不定式作表语说明主语的内容。e.g.Their aim is to reduce peoples dependency on the welfare state.His ambition
9、 is to fly to the moon one day.Functions of infinitive动词不定式（短语）作表语2.表示目的表示目的。e.g.The next step is to make sure that you know exactly what is required.the purpose of the next step3.3.动词不定式在表语中表示将来和预计。动词不定式在表语中表示将来和预计。e.g.I dont know what is to happen to us if we go on like this?The best item on the p
10、rogram is still to come.=what will happen=will come later4.用于被动语态，相当于用于被动语态，相当于can/could,should,ought to,must，具有情态意义。具有情态意义。e.g.You have done so much.You are to be rewarded.You should be rewarded.5.5.动词不定式作表语时，可用主动形式表示被动意义。动词不定式作表语时，可用主动形式表示被动意义。e.g.Who is to blame for the fire.Something is still to
11、 find out.1.all作主句主语，其后的定语从句中含有实义动词do的某种形式时。e.g.All we need to do is live each day with hope.2.what引导的从句作主语，从句中含有实义动词do的某种形式时。e.g.What I want to do is take a holiday right away.3.（主句）主语被only，first，one，least或形容词最高级修饰，且其后作定语的从句或短语中含有实义动词do的某种形式时。e.g.In the evening the only thing he did was read the ne
12、wspaper.语法填空语法填空1.My next work is _(construct)a nest and anchor it in a tree.2.You know,my goal is _(lose)150 pounds in the coming year.3.When I was 13 my only purpose was _(become)the star on our football team.4.One of the most damaging things a parent could do was _ (punish)their children for poor
13、 marks.5.Now that the factories were closed down,the citys next step was _(clean)the polluted river.to constructto loseto becometo punishto clean目标二：目标二：To learn to use infinitives correctly Activity 1:Write the sentences by referring to activity 3.Then check with each other.The sentence patterns:l
14、s intention of(doing sth.)was to l The best way to is to l What attempted to do was(to)l The main purpose of is to l The aim of is to l One of the things might be to l All that was/is to Activity 2:Work in pairs.Make conversations using the following questions and sentence patterns.1.Whats your bigg
15、est dream/ambition in life?2.How are you going to make your dream come true?3.How are you going to achieve your goal?4.Do you have any plans?5.What might be difficult for you?6.How are you going to deal with?l My biggest dream/ambition in life is to l I think all I have to do is l My plan is to l I
16、think one of the hardest things might be l I guess the best way to is You can begin like this:T:Hi,Alice.Whats your biggest dream in life?S:Well,my biggest dream in life is to T:It sounds great.How are you going to make your dream come true?S:I think all I have to do is Sample ConversationA:Whats yo
17、ur biggest ambition in life?B:My biggest ambition in life is to run an international marathon in Beijing.A:Wow,that sounds great!How are you going to make your dream come true?B:I should practise,practise,practise and never give up!A:How are you going to achieve your goal?Do you have any plans?B:Yes
18、,my plan is to run my first marathon in two years time.I think all I have to do is start running shorter races,and then get used to longer and longer races.A:What might be difficult for you?B:I think one of the hardest things might be training my body and mind to endure such a long race.A:How are you going to deal with that?B:I guess the best way to deal with that is to train slowly but with great focus,get a lot of support from friends and family,always be positive,and keep my long-term goal in mind.学习总结学习总结Now share the functions of infinitives used as predicative.
