I must ambulate you must ambulate he must ambulate we must ambulate you must ambulate they must ambulate
V-ing form
I must be ambulating you must be ambulating he must be ambulating we must be ambulating you must be ambulating they must be ambulating
Perfect
I must have ambulated you must have ambulated he must have ambulated we must have ambulated you must have ambulated they must have ambulated
V-ing perfect
I must have been ambulating you must have been ambulating he must have been ambulating we must have been ambulating you must have been ambulating they must have been ambulating
Negation
Simple form
I must not ambulate you must not ambulate he must not ambulate we must not ambulate you must not ambulate they must not ambulate
V-ing form
I must not be ambulating you must not be ambulating he must not be ambulating we must not be ambulating you must not be ambulating they must not be ambulating
Perfect
I must not have ambulated you must not have ambulated he must not have ambulated we must not have ambulated you must not have ambulated they must not have ambulated
V-ing perfect
I must not have been ambulating you must not have been ambulating he must not have been ambulating we must not have been ambulating you must not have been ambulating they must not have been ambulating
Interrogative form
Simple form
must I ambulate? must you ambulate? must he ambulate? must we ambulate? must you ambulate? must they ambulate?
V-ing form
must I be ambulating? must you be ambulating? must he be ambulating? must we be ambulating? must you be ambulating? must they be ambulating?
Perfect
must I have ambulated? must you have ambulated? must he have ambulated? must we have ambulated? must you have ambulated? must they have ambulated?
V-ing perfect
must I have been ambulating? must you have been ambulating? must he have been ambulating? must we have been ambulating? must you have been ambulating? must they have been ambulating?
Interro-negative form
Simple form
must I not ambulate? must you not ambulate? must he not ambulate? must we not ambulate? must you not ambulate? must they not ambulate?
V-ing form
must I not be ambulating? must you not be ambulating? must he not be ambulating? must we not be ambulating? must you not be ambulating? must they not be ambulating?
Perfect
must I not have ambulated? must you not have ambulated? must he not have ambulated? must we not have ambulated? must you not have ambulated? must they not have ambulated?
V-ing perfect
must I not have been ambulating? must you not have been ambulating? must he not have been ambulating? must we not have been ambulating? must you not have been ambulating? must they not have been ambulating?