It is said that Mr Green will be away for a few days.为什么用will?

问题描述:

It is said that Mr Green will be away for a few days.为什么用will?

翻译:据说格林先生会离开几天.
用will一可以表示将来时,二可以表示意愿,即情态动词will的用法之一.可是为什么不用would呢?It is said 不是应该用过去时么?It is said 可是一般现在时的被动语态;主从句时态要保持一致,所以不能用would.