Summarize:

Place your dominant foot forward slightly. Bend your knees, so that you could move your feet if you needed to, and hold your hands up near the top of your chest. If you’re using a mirror or a shadow, face it. All of the basic punches will start from this position. Practice jumping forward and backwards, then switching your weight from your right foot to your left foot. You shouldn’t be moving more than 2 feet (0.61 m) away from your original position--the point is to develop agility, not to jump far. All boxing footwork is based on these maneuvers. A jab is a swift punch aimed straight at your shadow's head. In boxing, it is used to stun, rather than deliver a knockout. You can do this with either hand, but it’s best to practice both right and left jabs. Do a combination of a left jab and a right jab, while keeping your body tight and steady. This is a punch with the right or left arm that is delivered with strong power from your chest. This is a knockout punch to your shadow's head, so you can put more strength behind it than you would for a jab. A left or right hook should start with your fist near your chin. A right hook should go slightly to the right, before turning back in a leftward motion on your shadow's chin. The left hook should go in the opposite direction. The uppercut is a little more complicated. You bend your knees enough to drop down about 6 inches (15.2 cm), and then send a swift and strong punch upwards toward the shadow’s chin. You should use your dominant hand only for this punch. Bobbing refers to bending your knees to escape from a punch. To weave, move your body towards the left or the right, with your feet in one place. This would make your shadow's punches slip past you.
Stand with your feet shoulder width apart. Practice basic footwork. Do a right and left jab. Try a straight punch. Use a left and right hook. Do an uppercut. Bob and weave to avoid getting hit.