Shoud have done 表示本应该做却没有做吗?

Shoud have done 表示本应该做却没有做吗? shoud have done sth是完成时的结构吗? could mightcould have done might have done在表示本有可能做某事时候有什么区别 （英语翻译）我本该早点告诉你真相的.〈shoud have done〉 would have done,might have done,could have done,should have done分别表示什么意思? be supposed to be done 和be supposed to have been done的区别原句The metal bar was supposed _____to the right size应填be supposed to be cut down他说:当be supposed to...的主语是“物”时,它表示“本应；本该”,用于表示“ couldn't have done?couldn't have done究竟表示对过去的否定推测,还是表示本不能做到的事做到了? have+sth.+done表示什么意思 请问HAVE SB DONE 不表示现在完成时 He cought to have handed in the paper yesterday .That’s what he __________.(A) shoud have done (B) should do (C) should (D) should be doing having done和to have done区别?我们老师说regret to have done,forget having done都表示完成. 简单总结一下情态动词+have done的用法1.虚拟语气（本应……而没有……）2.表推测将各个“情态动词+have done结构列入以上两类 must have done 和 should have done 的表示推测区别?must have done 和 should have done 都表示推测时,区别是什么? 关于would like to have done时态问题书上说would like to do用完成式可表示“本想去做,但没做”即：would like to have done一定是have 不能是had吗? 需要一篇英文文章,麻烦高人了.Describe an event you have done that was successfulyou shoud say :when the event took place who participatedwhy it was successful must have done 表示猜测 那 must do 表示什么 情态动词+have done 如 could have done,must have done,should have done 等等在如他么的否定词表示什么意思? could have done能不能表示对过去事实的猜测用在肯定句中?与must have done may have done might have done