As noted by Zanuttini (1997), TP-2 is the projection which hosts adverbs in its specifier that correspond to English 'already'; therefore, TP-2 presupposes the event and testifies that it has happened before a certain moment of time.
of this fact, the negative marker bo which occupies head of NegP-2 has the potential for contribution of a telic event, and that makes clauses containing such kind of VbN construction comply with an episode reading.