must ambulate
Regular verb: ambulate - ambulated- ambulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ambulate
you must ambulate
she must ambulate
we must ambulate
you must ambulate
they must ambulate 	I must be ambulating
you must be ambulating
she must be ambulating
we must be ambulating
you must be ambulating
they must be ambulating	I must have ambulated
you must have ambulated
she must have ambulated
we must have ambulated
you must have ambulated
they must have ambulated	I must have been ambulating
you must have been ambulating
she must have been ambulating
we must have been ambulating
you must have been ambulating
they must have been ambulating	

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

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