be to do和be doing在表将来的时候用法有什么区别?

将来时有BE DOING么?be going to do和BE DOING是算在现在进行时表将来? be to do和be doing在表将来的时候用法有什么区别? 用 be doing 和be doing to do 造句 三个 be afraid of doing 和 be afraid to do 区别 be easy to do和 be easy doing 的区别 be about to do和be about doing 区别 be allowed to do和be allowed doing 什么区别 be to do和be doing的区别 be gonging to do和be doing的区别 be careful doing和be careful to do的区别? be left doing和be left to do怎么区别 be doing (现在进行时表将来）和be going to do有什么区别 used to和be use to 加do还是doing 区别be going to do/will do/will be doing/be to do###还有用be doing表示将来时的情况 used to do,be used to doing和 be used to do的区别,并举例说明 be going to do和be doing 都能表将来,区别是什么?will do 和be doing表将来的区别是什么? be made to be doing 和be made to do的区别 be going to do和be doing和want to do 三者之间的区别