will/must/would /have/has/must have been + 过去分词各怎麼翻译?

问题描述:

will/must/would /have/has/must have been + 过去分词各怎麼翻译?

will have been done 表示将来要被做 would have been done 常用在虚拟语气,表示本要被做而没有做(记住在虚拟中的用法非常有用)must have been done 表示对过去的推测,一定被做……have/has been done 表示现在完...