Unit 1 Discover useful structures 课件-2022-2023学年高中英语人教版（2019）选择性必修第三册

Unit 1 ART Period 3: Grammar 动词不定式作表语 ①It is hard to give a precise definition. ②Perhaps the best way to understand Western art is to look at the development of Western painting over the centuries. ③During the Middle Ages, the purpose of Western art was to teach people about Christianity. ④ ...the main characters were often made much larger than everyone else to show their importance. ⑤In this work, Monet's aim was to convey the light and movement in the scene ... ⑥He sought to show not just the outer image of his subjects, but their inner warmth and humanity as well. ⑦What they attempted to do was no longer show reality, but instead to ask the question,“What is art?” I.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 ⑥ ④ ② ②③⑤⑦ 1.Study the rules ①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 Western 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 【拓展】主语是以_, _ , _, duty, suggestion,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内容或目的。 aim the best way to do purpose 1.Study the rules ②表示事态发展的_。 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。 ③用于第一人称疑问句,表示_。 What am I to do if I have no money?如果没有钱,我该怎么办呢? ④用于_,相当于can/could/should/ought to/must,具有情态意义。 You are to be rewarded.你应该受到奖励。(should) ⑤表示_等。 They are to marry next week.他们将在下周结婚。(安排) Children are not to smoke.儿童不准吸烟。(禁止) 结果,预期的结果,不幸的命运和预言 征求建议 被动 同意/安排/命令/决定/劝告/愿望/意愿/禁止 1.Study the rules ⑥可用主动形式表示_意义。 A great deal is yet to do.还有许多事情要做。 Something is still to find out.有些东西还有待查明。 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1】 ①My wish _ . 我的愿望是一年后被一所理想大学录取。 ②_if they ask me the q