be to do - 百度爱伴功

be to do
“be to do” 的用法
be to do 的用法
be to do 用法
be to do的5种用法
be to do 的八种用法
be+形容词+to do
辨析be to do,be going to do,和be about to do的区别
be+形容词+to-do
辨析be to do,be going to do,和be about to do的区别教学内容
will,be going to do,be to do,be about to do 和 be doing
be + to do sth
do与be的用法
to do
be to do的用法英语已印
be to do sth 的几种用法
Will,be going to,be to do, be about to do 结构的区别
do 与be的用法区别
be和do的区别与用法
be going to do 讲解
be to的用法
to do的用法