be+动词不定式用法以及几种表示将来时态的辨析

1、be +动词不定式用法以及几种表示将来时态的辨析be +动词不定式（即be + to do sth） 有以下几种含义：1 表示“将”、“计划”、“安排”。（意思接近于be going to）Their daughter is to get married soonIt was the last film at the cinema，which was to close next day.注：was/ Were to have done表示 本打算”本计划”或 本应当”做的事而没有做成或没有发生。如：I was to have seen him last Wednesday，but hdeidn

2、 ctomeWe were to have been married last year.2表示义务，应该，接近于（ShOUId，must，ought，have toNo one is to leave the building谁也不得离开这楼房。You are not to smoke in this room.=You are not supposed to smoke in this roomYou are to be back by 10o * clocks 必须十点以前回来。3.表示命运”将来必然要发生的事，译作注定”。女口 ：They said goodbye, little kn

3、owing they were never to meetagai n.4用于否定句，表示禁止”相当于mustn。例如：The books in this room are not to be taken OUtSiC 这个室内的书籍不得带出室外。YOU are not to smoke in the reading-room.不可以在阅览室里吸烟。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表示可以，可能”相当于may，Carb例如：The ne

4、ws is to be found in the evening PaPe 这条消息可以在晚报上见到。SUCh people are to be found everywhei 这种人至 U 处都有。She is nowhere to be found.哪里也找不着她。特殊结构：厂be to blame （该受责备，对某坏事应负责任）L be to letG 寺出租）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 le这房子要出租。辨析:1-Wil I

5、表示未经事先考虑而只是说话时临时作出的决定，表示说话人认有属为，相信，希望或假定要发生的事，也可表示倾向性或规律性，事物的性或必然趋势。注：在含有条件状语从句的主从复合句中 主句一般不用be going to而常用Will（第一人称用shall）。如：The football match will be PUt O什 if it rains tomorrow 女口 果 明天下雨，足球赛将被推迟举行。2.Be going to表示事先经过考虑，或有迹象表明某事即将发生或肯定发生，一般带有时间状语，常用于口语。3 般现在时表按时刻表或按规定发生的事4现在进行时表按计划、安排近期发生的动作（只限于c

6、ome, go,leave, arrive, start, move, sail, fly, travel, Sta 等）5.be about to do即将 常和When引导的时间状语连用（此形式不能与具体时间状语连用）小试牛刀：1 The StUdentS Were told that they _ at the school gate at2:00 t he following afternoon.A. met B. would meet C. Were to meet D. Were metbuilders Strike it is still only half finished.A

7、. is B. WaS to be C. WaS D. WaS to have been 3.In SUCh dry weather, the flowers will have to be Watered if theyA have SUrViVed are to SUrViVeC. would SUrViVeD. will SUrViVeWhat has become Of him?A. am; to know am; knowingC. was; to know D will; know5.hetomorrow, I would go to meet him at the Station.A. Were; to come WaS; COmingC. Did; comeD. Would; come答案解析：1. be to do表将来，时态需一致，用 Were to meet;2用WaS表明已经过去，to haVe been，虚拟语气，与事实相反，表明本该却没；3. if条件句，用不定式现在时态be to do表将来；