Is there an instance of McGregor saying "has" in the other prequels you could use? If not, I can try taking a stab at crafting a decent "has" audio clip.
Edit: some possible sources:
AOTC: "We will do exactly as the council has instructed"
ROTS: "Padme, Anakin has turned to the dark side."
ROTS: "He has become a very great threat."