Unit 1 Discover useful structures -高中英语人教版（2019）选择性必修第三册.pptx

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1、Unit 1 ART Period 3:Grammar动词不定式作表语 It is hard to give a precise definition.Perhaps the best way to understand Western art is to look at the development of Western painting over the centuries.During the Middle Ages,the purpose of Western art was to teach people about Christianity.the main characters

2、 were often made much larger than everyone else to show their importance.In this work,Monets aim was to convey the light and movement in the scene.He sought to show not just the outer image of his subjects,but their inner warmth and humanity as well.What they attempted to do was no longer show reali

3、ty,but instead to ask the question，“What is art？”I.预习检测预习检测(1)动词不定式作主语的句子为句_。(2)动词不定式作宾语的句子为句_。(3)动词不定式作表语的句子为句_。(4)动词不定式作状语的句子为句_。(5)动词不定式作定语的句子为句_。1.Study the rules表示表示_。The first step is to go exploring.第一步是去探索。1.Perhaps the best way to understand Western art is to look at the development of West

4、ern painting over the centuries.2.What they attempted to do was no longer show reality,but instead to ask the question，“What is art？”目的目的【拓展】【拓展】主语是以主语是以_,_,_,duty,suggestion,hope,idea,intention,plan等为中心的名词等为中心的名词词组时，或者词组时，或者以以what引导的名词性分句引导的名词性分句表示，一般用动表示，一般用动词不定式作表语说明主语的词不定式作表语说明主语的内容或目的内容或目的。aima

5、imthe best way to dothe best way to dopurposepurpose1.Study the rules表示事表示事态发展的展的_。You must speak out,if we are to remain friends.如果我们还想继续做朋友的话，你就必须畅所欲言。You are to die at ninety-eight.你会在98岁时去世。用于第一人称疑用于第一人称疑问句，表示句，表示_。What am I to do if I have no money?如果没有钱，我该怎么办呢？用于用于_,相当于相当于can/could/should/ough

6、t to/must,具有情具有情态意意义。You are to be rewarded.你应该受到奖励。(should)表示表示_等。等。They are to marry next week.他们将在下周结婚。(安排安排)Children are not to smoke.儿童不准吸烟。(禁止禁止)结果，果，预期的期的结果，不幸的命运和果，不幸的命运和预言言征求建征求建议被被动同意同意/安排安排/命令命令/决定决定/劝告劝告/愿望愿望/意愿意愿/禁止禁止1.Study the rules可用主可用主动形式表示形式表示_意意义。A great deal is yet to do.还有许多事情要

7、做。Something is still to find out.有些东西还有待查明。被动被动不定式短语 to let,to blame,to seek 等用主动形式表示被动含义Who is to blame for the population decline of the tigers in that area?The reason for global warming is not far to seek.【典例【典例1】My wish _ 我的愿望是一年后被一所理想大学录取。_if they ask me the question?要是他们问我这个问题，我该怎么回答呢？These bo

8、oks _这些书不应该被卖掉。In my opinion,_在我看来，她应该受到责备。The purpose of the art festival _ 这次艺术节的目的是加强学生对传统文化的意识。is to be admitted to an ideal university after one yearWhat am I to sayare not to be soldshe is to blame is to strengthen the students awareness of traditional culture2.动词动词不定式与不定式与动词动词-ing形式、形式、过过去分去分

9、词词作表作表语语的区的区别别动词不定式作表语表动词不定式作表语表某一次具体的某一次具体的/特定的特定的或或有待实现的有待实现的。e.g.My dream is to enter Peking University.而动词而动词-ing形式作表语表示形式作表语表示通常的情况通常的情况。e.g.My first job was working at the Ukiah Library when I was 16 years old.表示表示事物的特征或性质事物的特征或性质时，表语用时，表语用V-ing形式形式；e.g.They are satisfied with their present jo

10、b.表示表示人的内心感受人的内心感受时，表语用时，表语用done。e.g.Please describe a dog that is frightening.【典例2】My job is _我的工作是教你们英语。His dream is_ after he grows up.他的梦想是长大后当一名医生。teaching you English to be a doctor 3.动词不定式不定式(短短语)作表作表语省略省略to的情况的情况all 作主句主语作主句主语，其后的定语从句含有实义动词 do 的某种形式时。All we can do is live each day with hope.

11、what 引导的从句作主语引导的从句作主语，从句中含有实义动词 do 的某种形式时。What I should do is take a holiday right away.(主句主句)主语被主语被 only,first,one,last 或形容词最高级修饰或形容词最高级修饰，且其后的定语的从句或短语中含有实义动词 do 的某种形式时。In the evening the only thing he did was read the newspaper.【典例三】对比填空My ambition is _(work)in the computer industry when I grow up

12、.What I want to do is _(work)in the computer industry when I grow up.The most important thing to do is _(conquer)yourself.The most difficult thing is_(get)this company running smoothly.to workworkconquerto get四、训练检测四、训练检测 My aim in life is 1._(protect)the environment for future generations.My wish i

13、s 2._(become)an environmental consultant after graduation.Many people think that pollution cannot 3._(stop)if we want the country 4._(develop)But that is not true.What I suggest is 5._(cut)back on dangerous and dirty waste from factories.Many times，factories which produce a large quantity of goods a

14、re 6._(blame)for much pollution in the environment.Besides，what people should pay attention to is 7._(purchase)products which can be recycled.There is no doubt that we have a problem with population as well.The number of people in the world 8._(keep)growing，and we 9._(produce)more rubbish and using up more raw materials.What if they run out?I am confident that if we are all willing 10._(work)together，we can overcome these challenges and keep the Earth clean and healthy.to protectto becomebe stoppedto developto cutto blameto purchasekeepsare producingto work