是非谓语动词做表语时sb be to do 与 sb be about to do 的区别

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是非谓语动词做表语时
sb be to do 与 sb be about to do 的区别

e to do一般是表示按计划进行或征求对方意见
e.g.I am to go to school tomorrow.
Are we to go on with this work?
be about to 即将发生的动作,指眼皮底下就要发生的事情（对了,一般是不跟时间状语的）
e.g.Look,the train is about to leave!
固定结构：
be about to do sth when...当某事发生时,正好...
He was just about to stand up when the teacher came in.
老师进来的时候,他刚要站起来.

是非谓语动词做表语时sb be to do 与 sb be about to do 的区别 it is adj.for sb to do 与sb.be adj.to do sth的区别是什么? 英语sb be to do make sb do与make sb to do的区别 be easy to do和be easy for sb to do的区别 there be 与for sb to do 的用法求sb be suggested to do与suggest doing 的区别 be good for sb do good to sb 等等的区别不定式做表语与将要做be to do的区别 request sb to do与ask sb to do 区别 be to do & be about to do的区别 request sb to do与request to do的区别