情态动词can't have done 和couldn't have done 有什么区别吗对过去发生的事情否定猜测用can't have done 或couldn't have done ,两者有区别吗?比如 He can’t have gone to Beijing for I saw him a minute ago. 能换成He couldn

情态动词+have done 情态动词＋have donemust have done/can't have doneshould have done/shouldn't have doneneed have done/needn't have donemay(might) have done/haven't donecould have done/couldn't have donewould have done/wouldn't have done如何用?我这样分正 情态动词+have done 用法及意义must have done need have done daren't have donecould never have done could have done “情态动词 have done ” 全面一些, 情态动词+have done地用法 情态动词+have done 完整用法讲解? 情态动词+have+done 的详细用法? 情态动词can't have done 和couldn't have done 有什么区别吗对过去发生的事情否定猜测用can't have done 或couldn't have done ,两者有区别吗?比如 He can’t have gone to Beijing for I saw him a minute ago. 能换成He couldn can't是不是情态动词 情态动词加Have done用法每种情态动词加-have done的意思 can’t +have done must have been done是什么被动语态如will be done是一般将来时被动语态,can be done是情态动词被动语态 情态动词can,have to,must用法 英语翻译只要是情态动词（not)+have done都是虚拟！ 情态动词+have done是虚拟语气吗? 情态动词+have done的意义有哪些? 情态动词+ have done一定用于虚拟语气吗 情态动词can't的用法