请问could not have done/might not have done可用于虚拟语气中吗
请问could not have done/might not have done可用于虚拟语气中吗
could not have done
could have done 表示过去有必要做某事却未做 could not have done没有虚拟语气的用法,只
虚拟语气中对过去的虚拟主句否定是用would have not done or would not have done?
虚拟语气中would could should might have done与had done都是表示过去,在用法上有
虚拟语气 should have done 与 could have done
关于could have done 的虚拟语气
could not have done是什么意思?
情态动词中 should might could would + have done 与 它们在if 虚拟语气中用法 有
虚拟语气could/should/would/might +have done 用法的差别?
高中英语中might have done 和could have done
求虚拟语气的讲解 had sb done sth,sb would have not done