请问be to do.be about to do.be going to do.will do用法的区别.

be to do,be going to do,will do,be about to do的区别. 将来时态的区别be going to;will do;be doing;be to do;be about to do will \be doing to do \be about to do \be to do的区别 be going to do/be doing/will do/be to do等 的区别~ will do sth, be about to do sth, be to do sth, be going to d will be 与be going to do 的用法 be going to do、be about to do、be to do,这三者有什么区别? 区别be going to do/will do/will be doing/be to do be to do和be going to do的区别 be going to do 和be doing用法的区别? be to do & be about to do的区别 将来时的用法be going to do 与will do 用法的区别