高三语法题:情态动词 I ___, I promise.I ___, I promise.A. would B. will B. shall D. should为什么用would 而不用will shall还是不明白

问题描述:

高三语法题:情态动词 I ___, I promise.
I ___, I promise.
A. would B. will B. shall D. should
为什么用would 而不用will shall
还是不明白

你对他人允诺,他人去做的事用shall,你来做的用would will ,would表语气