被动语态的基本结构是be+及物动词过去分词，其各种时态形式如下：
一般现在时: is/am/are done；一般过去时：was/were done
一般将来时：will be done；
过去将来时：would be done
现在完成时：have/has been done；过去完成时：had been done
将来完成时：will have been done
现在进行时：is/am/are being done; 过去进行时：was/were being done
将来进行时：will be being done
