Think again, Andrea. The movements of kicks and punches are quite different due to the mechanical workings of the joints involved. Kicks tend to always work in arcs and punches can come at you in a very straight line.
If you always watch the center line and shoulders of the uke, you can see any pre-movement body shift to take weight off a leg in order to kick (this works for the punches, too). Arcs are also much easier to see and enter into.