完成时被动语态为什么是have been done为什么不是 have be done什么情况下 be变成been

完成时被动语态为什么是have been done为什么不是 have be done什么情况下 be变成been 现在完成进行时的主动和被动语态都是have been doing吗? have been done 什么东西?have been doing是现在完成进行时的被动语态嘛? They have known him___to have been arrested_____(arrest) by the police.划线上为什么用不定式的被动语态啊,应该没有know sb to 还有为什么是不定式被动语态的完成时啊，主要是两点：1.为什么是用不定式 2.为 英语完成时和被动语态什么时候用被动语态 什么时候完成时、被动语态动词前加be/been 完成进行时（have+been+现在分词） 完成时被动语态（have+been+过去分词） 现在完成时（have+过去分词）怎么区分呢? have been done除了表示完成时被动语态外,可以表示其他的么?比如I have been done中的been可以表状态么 people have been suffering a lot 为毛要加been这不是进行时的被动语态吗 have been married 是被动语态吗 请帮我讲解这句话They have been married for 10 yearsThey have been married for 10 years 为什么是have been have been不是现在完成时的被动语态吗 现在完成进行时变被动语态的问题We have been discussing the problem all the evening.怎么变被动? 现在完成进行时的被动语态结构是have been +过去分词还是have been+doing例如：They have been collecting some stamps since2000Some stamps have been collected by them since 2000 have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been的解释have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been用法；完成时用法’被动语态用法 现在完成试的被动语态All the books have been sold out in the bookshop变为主动语态 If she had returned an hour earlier,Mary would not have been caught in the heavy rain.这句是虚拟语气吧?主句would 是情态动词 代指将来,have been 是被动语态,我这样理解对么?那if引导的从句为什么是过去完成时态 有没有完成进行时的被动语态have been being done的?它具体的用法是什么?表示什么的呢? 为什么是agreement had been reached而不是had reached,为什么要用被动语态? 有动名词的完成时的被动语态这种说法么 having been done?