系动词没有什么时态

过去完成时：had been
过去完成进行时：had been being
完成进行时：have been being
完成时 have\has been
过去时 was\ were\
一般现在时：be\ am \ is\ are
一般进行时:be\ am \ is\ are ＋being
一般将来时:will\would be
将来完成时:will \would have been
将来完成进行时:will \would have been being
等等