BE BEING DOING/BE BEING DONE/HAVE BEEN DONE

(be being done进行时被动语态)
例The students are cleaning the classroom now.
→The classroom is being cleaned now.
（have been done现在完成时）
例The room has been cleaned by me.
(be being doing)这个貌似没有现在完成时的被动语态?have/has+been+过去分词