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 mustn't ambulate you mustn't ambulate he mustn't ambulate we mustn't ambulate you mustn't ambulate they mustn't ambulate
V-ing form
I mustn't be ambulating you mustn't be ambulating he mustn't be ambulating we mustn't be ambulating you mustn't be ambulating they mustn't be ambulating
Perfect
I mustn't have ambulated you mustn't have ambulated he mustn't have ambulated we mustn't have ambulated you mustn't have ambulated they mustn't have ambulated
V-ing perfect
I mustn't have been ambulating you mustn't have been ambulating he mustn't have been ambulating we mustn't have been ambulating you mustn't have been ambulating they mustn't 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
mustn't I ambulate? mustn't you ambulate? mustn't he ambulate? mustn't we ambulate? mustn't you ambulate? mustn't they ambulate?
V-ing form
mustn't I be ambulating? mustn't you be ambulating? mustn't he be ambulating? mustn't we be ambulating? mustn't you be ambulating? mustn't they be ambulating?
Perfect
mustn't I have ambulated? mustn't you have ambulated? mustn't he have ambulated? mustn't we have ambulated? mustn't you have ambulated? mustn't they have ambulated?
V-ing perfect
mustn't I have been ambulating? mustn't you have been ambulating? mustn't he have been ambulating? mustn't we have been ambulating? mustn't you have been ambulating? mustn't they have been ambulating?