ca'a: actually is; CAhA, modal aspect: actuality/ongoing event . ka'e: innately capable of; CAhA, modal aspect: innate capability; possibly unrealized .
na'epu'i: has never; CAhA*, modal aspect: has never, and perhaps cannot; other-than-demonstrated-ability. nu'o: can but has not; CAhA, modal aspect: can but has not; unrealized potential .
pu'i: can and has; CAhA, modal aspect: can and has; demonstrated potential .