英语语法分析虚拟语气用在hadbetter,hadbest,hadrather,wouldsooner,wouldrather,wouldhave句型中,后接原形动词还是过去had+done现在过去时(be用were)将来过去时(be用were

Question

英语语法分析
虚拟语气用在had better,had best,had rather,would sooner,would rather,would have句型中,后接 原形动词 还是
过去 had + done　
现在 过去时(be 用were )
将来 过去时(be 用were

Answer 1

当had better,had best,had rather,would sooner,would rather,would have后面跟的是宾语从句时,就用
过去 had + done　
现在 过去时(be 用were )
将来 过去时(be 用were )
,当是单独的句子时候,就用原形动词
eg：
I'd rather you had seen the film yesterday.
eg：You had better close the window.