proper form

i was wondering what is the correct form when throwing a haymaker,cross,and hook punch? with these punches can you a vertical fist like with a jab?

Hello CFH
I would say that the correct form for any of those strikes is the one that hurts your opponent! LOL! I have practiced all of those punches as both vertical and horizontal, and found that they work equally well. Just depends on the situation.
Good Training!

In my own training and bag work I do find it better to use a vertical shaped fist when doing hooks, mainly because it helps to keep my elbow closer to my body and not leave my ribs open, plus I have also been taught that the vertical shape is better in any punch type attack due to the muscles and bones not crossing over - my Sensei says anything crossed is crossed energy which makes it weaker.