Particle
hey; you
at sentence-end; indicates certainty, emphasis, contempt, request, warning, etc.
1000円かそこらで買えますよ。You can buy it for a thousand yen or so. hey
after a noun; used when calling out to someone
hey; hold on
in mid-sentence; used to catch one's breath or get someone's attention
Interjection (kandoushi)
yo; hey