Have a friend come to hit you as he walks through you. Your job is to move your body away so the arms are free to move and to continue walking with him and closing the distance between your bodies without interrupting his movement.
The next drill is doing the same only now you add to this another direction of your own after you move with him and feel where he is not dense or aware. Have patience and keep breathing as you move and avoid focusing your eyes where your hands rest. Let them see for themselves.
Next have him come at you without pause and without stop and you have to blend with his movement and only do your work to bring him down when you feel you are safe and relaxed. Note the distance between you and check if your arms are defending the air around you or working. Many evade the first strike and than fall into a struggle in place working like a screw left and right. Avoid that by not giving any support and you will survive.