su.nakho bhatta.m bhu~njati (subject object verb)
su.nakhena bhatto bhu~njiiyati (subject object verb is it correct?) >>
Jim: For the second sentence, I would put it: (agent subject verb).
<< su.nakhena:- Ableative of Agent, can we named subject?(anuttakattaa)
bhatto:-nominative, is it object? (uttakamma) >>
Jim: instead of Ablative of Agent, I would put it: Instrumental Agent.
Su.nakhena can not be the subject since it is anuttakattaa, to use your
terms; bhatto is both the subject and the object (uttakamma) with the
passive verb bhu~njiiyati. However, in the case of your first sentence,
su.nakho is the subject (uttakattaa) while bhatta.m is the object
(anuttakamma) of the active verb.