How do I train my left hand to punch like my right.?

Question

my left hand is really weak so i wonder what kind of training would get my left hand to punch my my right

Answer 1

just keep trainning and focus on your left punch to improve. also lift some weight to get some power

Answer 2

Get a punching bag then tie your right hand behind your back and keep punching with your left

Answer 3

If you are right handed, as you seem to be, you can't actually train your left to be equal to your right.  You can make it a much more effective tool that it seems to be right now.  Try lifting a single dumbell (not terribly heavy, 3 sets of 15+ reps) with the left, doing both forearm curls and shoulder shrugs.  Remember the force of a punch does not come primarily from the arm.  Then punch the heavy bag over and over again with the left only, practicing footwork to put your body weight behind it.  Really, you can only get some hints like these here.  Your trainer should be working with you on this.