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课件网) Unit 1 Art To know the usage of infinitive as predicative 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 this work, Monet's _____ was to convey the light 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 What do these sentences have in common 动词不定式（to do) 在句子中作表语。 一、主语是以_____, ____ ,_____ duty,suggestion,duty,hope,idea,intention,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___ _。aim1. Perhapsthe best wayto understand Western artisto look atthedevelopment of Western painting over the centuries.2. During the Middle Ages,the purposeof Western artwastoteachpeople about Christianity.3. In this work,Monet's aimwasto conveythe light andmovement in the scene…Functions of infinitivewaypurpose内容注意： 不定式在作表语时，当前面的主语中有do的某种形式时，作表语的不定式可以省略to。 eg What you should do next is (to) help him with his English。 The only thing he can do now is (to) give up the plan. 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。 During the Middle Ages, the purpose of Western art was to teach people about Christianity. During the Middle Ages, to teach people about Christianity was the purpose of Western art. 1、动词不定式作表语，表示主语的内容。 主语常常是表示意向、打算、计划的词，如wish, idea, task, purpose, duty, dream,等。 一般来说，动词不定式作表语往往表示具体的某个动作，多表示将来。 eg His task is to correct these papers. （具体的将来的行为） 不定式作表语 动词不定式(短语)作表语的用法 1.主语是以aim, suggestion, duty, hope, idea, intention, plan, purpose, the way to do sth.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。 My idea is to climb the mountain from the north.我的想法是从北面爬这座山。 Our plan is to make better use of these materials.我们的计划是更好地利用这些材料。 What I would suggest is to ask your father for his opinion.我的建议是征求你父亲的意见。 The best way to encourage your kids to enjoy meals is to involve them in the planing and preparing.鼓励孩子享受美食的最好方法是让他们参与计划和准备(美食)。 动词-ing形式和不定式同样都可以充当表语，两者的区别在于不定式表达是具体或是将来发生的动作，而动词-ing形式则表示抽象的一般行为。 e.g. His job is delivering the letters to their destinations. My job is to look after the sister when Mom is cooking. 二、动词不定式在表语中表示___。目的The next step isto make surethat you know exactly what is required.Functions of Infinitive1. I don’tknowwhat is to happento us if we go on like this 2.We believe man isto livea better life in the future.三、动词 ... ...
