Tai Chi is based on correct posture and proper alignment to make the best use of your whole body.
everydaytaichi by lucy has developed "key words" that she uses to call out as the movements are done
Apparent Closing
After Turn, Deflect, Parry and Punch
Touch
Open your Fingers
Push Up and forward
Pivot your Left heel
Open your Right foot
Open your Right hand
Intermediate closing
Bring to a Cross Hands
Push up on your left with pressure from your Right
Push out on your right with pressure from your Left