1) am/is/are done (过去分词) 一般现在时 2) has /have been done 现在完成时 3) am/is /are being done 现在进行时 4) was/were done 一般过去时 5) had been done 过去完成时 6) was/were being done 过去进行时 7) shall/will be done 一般将来时
被动语态结构:be+动词过去分词