虚拟语气中should+动词原形与直接用过去式两种情况可否互换
问题描述：
虚拟语气中should+动词原形与直接用过去式两种情况可否互换
答
可以的,有三种.如：
It were to rain tomorrow=If it rained tomorrow=If it should rain��ôit's high time that + should do/did ��������ɷ�����˼���Ƿ���ͬ����ôit's high time that + should do/did ��������ɷ�����˼���Ƿ���ͬ��