高中语法be+不定式”结构用法归纳.docVIP

高中语法be+不定式”结构用法归纳1．表示按计划或安排将要发生的动作：We are to meet at the school gate at 2p.m.我们定于下午两点在校门口集合。This film is to be shown this Sunday.这部影片将在这个星期天放映。2．表示指示 instructions 、命令 orders 或要求 requirements ，通常可译为“应当”“必须”。No one is to leave this building. 谁也不得离开这座大楼。You are not to smoke in this room. 你们不能在这个屋子里吸烟。You are to be back by 10 o’clock. 你必须在10点钟之前回来。They are to finish the work before dark. 他们必须在天黑前完成工作。They usually write exact instructions how the music is to be played.他们通常还要为如何演奏他们的乐曲写出精确的说明。On the subject of reading, Francis Bacon, who lived at about the same time as Shakespeare, wrote these words, “Some books are to be tasted, others to be swallowed, and some few to be chewed and digested.” 关于阅读这个题目,弗朗西斯#8226;培根 与莎士比亚大约是同时代的人 曾经写过这样的话: “有些书是应当尝尝滋味的, 有些书是应当吞食下去的, 有少数书是应当咀嚼和消化的。”3．用在间接引语中,表示指示、命令或要求。这时是说话人转述别人的指示、命令或要求。be to在这里相当于had to, must, should.The message is this: you are to go to the hotel where rooms have already been booked for you.他给你们留下话: 你们应当去旅馆,房间已经为你们预定好了。The headmaster says you are to come at once. 校长说你必须马上来。The teacher said we were to wait outside. 老师说我们应当在外面等着。4．常见于报纸和广播, 用以宣布官方的计划或决定。The line is to be open to traffic on October 1. 这条线路十月一号通车。The Prime Minister is to visit Canada next month.首相将在下个月访问加拿大。5．表示受人们意志控制的将来动作，可以用于条件句中。If you are to succeed, you must do more reading.你要想成功,必须多读书。In such dry weather, the flowers will have to be watered if they _____. 上海高考,2001-32 A. have survived?? B. are to survive??? C. would survive?? D. will survive6．表示可能性。She was nowhere to be found. 哪也找不到她。We looked and looked, but the ring was nowhere to be found. 我们找了又找,可是这枚戒指再也找不到了。He was never to see his wife and family. 他再也不可能见到他的妻子和其他家人了。The worst was to come yet.最坏的情况就要发生。7．表示按计划或安排将要发生的过去将来的动作可以用was/were to+不定式表示：As I was to leave the next day, I went to bed early on Thursday evening.因为第二天要动身,所以星期四晚上我早早地睡觉了。The meeting was to be held the following week.会议计划在下周举行。8．如果过去将来的计划或安排没有实现,可用was/were to+不定式完成式表示：I was to have left the nex