It is desirable that the airplane be as light as possible.为什么要用be?
问题描述:
It is desirable that the airplane be as light as possible.为什么要用be?
请解释得详细一点···
答
虚拟语气,把should省略了.当advisable desirable urgent 等表示强烈的情感,意见,意图的词作表语或补语时,从句用虚拟,比如 it is important that all figures be checked