Contrary to ~mikae* ‘do what’ and ~kae* ‘do how’ which both take a personal subject, ~ve always takes a (semantically impersonal) 3sg subject i-. The surface form is therefore always ive (for i-ve).
Related entries
Main Entry:
iveinterrogative verb enquiring about a whole situation / what happens? what's up? how's things? / what? Used when the speaker looks for his words to describe a whole event / (be) why? / what's up with ‹s.o., s.th.›?