be-to用法.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Be to,用法,be to,do,表示,:“,计划”、“安排”、“义务”、“应该”、“可能”、“命运”等。如,:,1.,表示“将”、“计划”、“安排”如：,Their daughter is to get married soon.,Who is to question him,？,After dinner they were to go to a movie.,2.,表示“义务”、“应该”。,(,意思接近于,should,，,must,，,ought to,，,have to),如：,No 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 room.,You are to be back by 10 oclock.,你必须十点以前回来。,3.,表示可能性,相当于,can,may,如,:,Such books are to be found in the library.,这样的书在图书馆里就能找到。,Not a single sound,was to,be heard.,一点儿声音也听不到。,Not a soul,was to,be seen.,看不到一个人影。,She was nowhere to be found.,哪儿也找不到她。,She was never to see his wife and family again.,5.,表示“命运”,将来必然要发生的事,“,注定,”,。如：,The worst is still to come.,They said goodbye,little knowing they were never to meet again.,6.,用于“,ifwere to do”,，表示虚拟语气。,如：,If it were to rain tomorrow,the sports meeting would be put off.,如果明天下雨,运动会就会延期。,was/were to do,表示过去曾经计划要做的事，或者过去应当做的事，而且从现在的角度来看已经实现了。,如：,I felt nervous because I was soon to leave home for the first time.,I was to play Juliet.,The expedition was to start in a weeks time.,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 he didnt come.,We were to have been married last year.,