should have done这个句型有吗好像是什么虚拟

should have done这个句型有吗好像是什么虚拟 英语翻译用上should have done这个词组 need have done ,must have done ,can/could have done ,should have done 的区别是什么?意思是什么?主要用于哪种句型?请分别举例说明, should have done是什么意思? Could have done would have done should have done 新概念英语2级问题用must be done,can be done,should be done,have to be done,will be done这些句型造句,每种造两个,每种句型各两个 should have done与should have been done的区别? should have done 和should not have done的区别 should ought to have done would have done,might have done,could have done,should have done分别表示什么意思? should have done ,shouldn't have done.could have done,couldn't have done 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 should have done 表示条件?should the soviets haveshould have done 表示条件?should the soviets have attacked china,.would have done .这个句子前面部分是条件吗? should have done 可以换成 ought to have done嘛? would rather have done 与should have done 的区别 should have done和could have done的区别? 英语：should have done与could have done区别? should have done 和have done有什么区别