2020-2021学年高二同步新教材人教版（2019）选择性必修第三册学案UNIT 1 突破语法大冲关

不定式作表语 【观察例句】 1．Perhaps the best way to understand Western art is to look at the development of Western painting over the centuries. 2．During the Middle Ages，the purpose of Western art was to teach people about Christianity. 3．In this work，Monet's aim was to convey the light and movement in the scene. 4．What they attempted to do was no longer show reality，but instead to ask the question，“What is art？” 【归纳用法】 一、不定式作表语的用法 1．表目的 The purpose of education is to develop a fine personality in children. 教育的目的是发展儿童完美的品格。 2．表示事态发展的结果、预期的结果、不幸的命运或语言。 You must speak out，if we are to remain friends. 如果我们还想继续做朋友的话，你就必须痛痛快快地把话都说出来。 3．用于第一人称问句，表示征求意见。 What am I to say if they ask me the question? 要是他们问我这个问题，我该怎么回答呢？ 4．表示“同意、安排、命令、决定、劝告、意愿、禁止”等。 They are to marry next week. 他们将在下周结婚。(安排) [即学即练1]　单句语法填空 ①His ambition is to become (become) a famous novelist. ②Our most important task now is to make (make) a plan. ③The function of Louis Sullivan's architecture was to provide(provide) large uninterrupted f