be sure to do 与be about to do之间的区别

be sure to do 与be about to do之间的区别 be sure of be sure to do 的区别· be to do & be about to do的区别 be to do,be going to do,will do,be about to do的区别. make sure to do与be sure to d 的区别是什么 make sure,be sure of ,be sure to do,for sure的区别 make sure to do 与be sure to do will \be doing to do \be about to do \be to do的区别 sure的用法be sure of doing和 be sure to do有什么区别呀? 辨析 be sure of 与be sure to do sth be to do be about to do 有什么区别 be certain to do 和be sure to do 的区别