be动词后面的动词形式有三种可能: -ing:现在进行时, I'm trying to give you the right answer. -ed:被动语态, I'm told that you don't know her. to do: 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? 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。
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。
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。
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mustn’t。
例如: 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。
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? 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。
望采纳,谢谢
tobe后面要加的是什么词?是名词吗?欢迎分享,转载请注明来源:内存溢出
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