be to do sth 的几种用法.docx

be + to do sth.的用法1.表示按计划或安排要做的事例如：Whe n are you to leave for home?你什么时候回家？She is to be married next mon th.她将于下个月结婚The Quee n is to visit Japa n in a week's time .女王将于一周后访问日本这种结构也可用于过去 was / were to do sth. 表示曾经计划要做的事，但不表 明计划是否被执行，或表示“命运（即命中注定要发生的事）”，而非计划；was / were to have done sth.表示未曾实现的计划例如：I felt nervous because I was soon to leave home for the first time.我感到很紧 张，因为我很快就要首次离开家了They said goodbye, little knowing that they were n ever to meet aga in.他们告了 别，不知道以后再也不会见面了We were to have told you, but you were not in.我们本来想告诉你的，但是你不 在家。

2■表示“应该”，相当于should, ought to例如：You are to report to the police.你应该扌报警What is to be do ne?应该怎么办呢？3■表示“必须”，相当于must, have to例如:The le tter is to be han ded to him in pers on.这封信必须亲手交给他You are to do your homework before you watch TV.看电视之前你得先做完作 业4•表示“想，打算”，相当于intend, want例如：If we are to be there before ten, we'll have to go now.如果我们要在十点前至U, 我们现在就得走5.用于第一人称疑问句，表示征求对方意见例如：Am I to go on with the work ?要我继续完成这项工作吗？What are we to do n ext?我们下一步该怎么办？6•用于否定句，表示“禁止”，相当于must n't例如：The books in this room are not to be take n outside .这个室内的书籍不得带出室 外。

You are not to smoke in the read in g-roo m.你不可以在阅览室里吸烟7•表示“可以，可能”，相当于may, can例如：The n ews is to be found in the eve ning paper.这条消息可以在晚报上见至USuch people are to be found everywhere .这种人至U处都有She is nowhere to be fou nd.在哪里也找不着她8. were to do sth■用于 if 或 even if / even though 从句中，表示对未来的假设例如：If I were to tell you that I killed him, would you believe me?要是我告诉你是我杀 了他，你会相信吗？Eve n if the sun were to rise in the west, I would n ever do such a thi ng 即使太卩日 从西边出来，我也决不做这种事9. be to blame（该受责备，对某坏事应负责任）与be to let（待出租）两种结构中，用不定式的主动形式表示被动含义。

例如：Which driver is to blame for the accide nt?这事故是哪个司机的责任？ This house is to let .这房子要出租Exercise1. We have been looking for the boy all the afternoon but he is nowhere A. to see B. seeing C. seen D. to be seen2. As early as his second film, Chaplin had developed his own manner of acting, the one that ___ world famous.A. would become B. became C. was to become D. had become3. We just saw John at the bookstore. That's strange; I didn't think he back until tomorrow.A. will come B. was to come C. is coming D. is to come4. The final examination ___early July.A. is to be held B. is to be taken placeC. is going to hold D. will be to take place5. If the sun ___ tomorrow, what would we do?A. were not to raise B. does not riseC. would not rise D. were not to rise6. A new hospital was to in this district, but the money wasn't collectedyet.A. have been built B. be built C. built D. have built7. Look at these clouds. .A. It's going to rain B. It's rainingC. It is to rain D. It can rain8. Who do you think for the failure of their marriage.A. to blame B. to be blame C. is to blame D. is to be blamed9. Neither you nor he to the front.A. are to be sent B. is to be sent C. have to be sent D. is to send10. I to bed when there was a knock at the door.A. went B. am going to C. was to go D. was about to go11. we again next week? Yes, let's make it next Wednesday.A. Are; to meet B. Shall; be to meetC. Will; meet D. Are; meeting12. As students, we .A. won't smoke B. are not to smokeC. aren't smoking D. don't smokeKey: 1.D 2.C 3.B 4.A 5.D 6.A 7.A 8.C 9.B 10.D 11.A 12.B。