时间 | 从句谓语形式 | 主句谓语形式 |
将来 | 动词过去式(be用were) should + 动词原形 were to + 动词原形 |
would / should / might / could + 动词原形 |
现在 | 动词过去式(be 用 were) | would / should / might / could + 动词原形 |
过去 | had +动词过去分词 | would / should / might / could have + 动词过去分词 |
老师,这个表里的主句用法,would / should / might / could之间的区别是适用于人称的不同吗?如should用于第一人称,would用于二三人称?还是说根据语境判断是虚拟用法还是情态动词用法?谢谢