一般现在时：am/is/are+done+by+人称代词/名词过去进行时：was/were+being+done+by+人称代词/名词一般过去时：was/were+done+by+人称代词/名词一般将来时：will+be+done+by+人称代词/名词现在进行时：am/is/are+bein...