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be +动词不定式(即be + to do sth.)的用法如下:1.表示按计划或安排要做的事.例如:When are you to leave for home?你什么时候回家?She is to be married next month.她将于下个月结婚.The Queen is to visit Japan in a weeks 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 never to meet again.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.你应该报警.What is to be done?应该怎么办呢?3.表示“必须”,相当于must,have to.例如:The letter is to be handed to him in person.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,well have to go now.如果我们要在十点前到,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 next?我们下一步该怎么办?6.用于否定句,表示“禁止”,相当于mustnt.例如:The books in this room are not to be taken outside.这个室内的书籍不得带出室外.You are not to smoke in the reading-room.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 news is to be found in the evening paper.这条消息可以在晚报上见到.Such people are to be found everywhere.这种人到处都有.She is nowhere to be found.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?Even if the sun were to rise in the west,I would never do such a thing.即使太阳从西边出来,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 accident?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.-Thats strange; I didnt 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 wasnt collected yet.A.have been built B.be built C.built D.have built7.Look at these clouds._.A.Its going to rain B.Its 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,lets make it next Wednesday.A.Are; to meet B.Shall; be to meetC.Will; meet D.Are;
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