虚拟语气中had done与would have done,did与would do 的用法有何区别

虚拟语气中had done与would have done,did与would do 的用法有何区别 虚拟语气中的would/conld/should do/have done 与 did/had done有何区别 虚拟语气,与过去事实相反 :从句 :had + 过去分词 主句 :would/ should/ could/ might + have + done虚拟语气,与过去事实相反 :从句 :had + 过去分词 ,主句 :would/ should/ could/ might + have + done,为什么有时会有wou 英语虚拟语气 200分在if引导的虚拟语气中,主句用would have done（与过去相反）或would do（现在相反）,从句用had done或did,were和were to do.但在as if ,if only ,but for等词引导的虚拟句中,却只能用上面的 关于would rather的虚拟语气would rather have done跟would rather had done是不是都是表示对过去的虚拟语气? 虚拟语气中would could should might have done与had done都是表示过去,在用法上有何区别?像在主语从句宾语从句中的区别 虚拟语气中'd怎么区别是had还是would? 是不是看到would rather 就是虚拟语气?是不是就只有would rather did（与现在将来相反）had done 与过去相反?其他形式就没有了? 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? 情态动词中 should might could would + have done 与 它们在if 虚拟语气中用法 有何关系? shall have done和would have done在虚拟语气句中是什么意思? 虚拟语气 if You could have done other career What would it have been 为什么不是 if ..Had done 句 虚拟语气只用would不用had? 虚拟语气中的would have done 与could have done结构 有什么 区别?什么时候用would什么时候用could? 求虚拟语气的讲解 had sb done sth,sb would have not donehad sb done sth,sb would have not done这个句型是什么意思 怎么用 表示与过去事实相反的虚拟语气If I had left a little earlier,I would have caught the train这里为什么是had done 而不是hane done? would/could/must have done在虚拟语气中怎么用? 英语虚拟语气should would表时态吗英语虚拟语气与过去事实相反时,should/ would 表时态吗从句 过去某种行为如果实现(had done),主句 should /would (have done) 续从句条件成立后的某种行为假设实现/影响