一般过去时中,什么时候用has,什么时候用has/have been?

答：一般过去时中,任何情况下都不会用has,（出改错题时除外）系动词Be的现在完成时态中用has/have been如I have been to Beijing。He has been abroad。被动语态的现在完成时态也用has/have been+ 过去分词。如：He has been killed。