be to do ; will be ; be going to ; be about to ; 现在进行时表将来有什么区别?

问题描述:

be to do ; will be ; be going to ; be about to ; 现在进行时表将来有什么区别?

1be to do 这种结构表示职责,义务,意图,约定,可能性等.You are to be back by 10 o'clock 你必须十点钟回来We are to meet at the school gate.我们约定在校门口见面.2 will 表示将来的动作或状态 这个用法比较普遍,...