must stroll
Regular verb: stroll - strolled- strolled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stroll
you must stroll
he must stroll
we must stroll
you must stroll
they must stroll 	I must be strolling
you must be strolling
he must be strolling
we must be strolling
you must be strolling
they must be strolling	I must have strolled
you must have strolled
he must have strolled
we must have strolled
you must have strolled
they must have strolled	I must have been strolling
you must have been strolling
he must have been strolling
we must have been strolling
you must have been strolling
they must have been strolling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stroll
you mustn't stroll
he mustn't stroll
we mustn't stroll
you mustn't stroll
they mustn't stroll 	I mustn't be strolling
you mustn't be strolling
he mustn't be strolling
we mustn't be strolling
you mustn't be strolling
they mustn't be strolling	I mustn't have strolled
you mustn't have strolled
he mustn't have strolled
we mustn't have strolled
you mustn't have strolled
they mustn't have strolled	I mustn't have been strolling
you mustn't have been strolling
he mustn't have been strolling
we mustn't have been strolling
you mustn't have been strolling
they mustn't have been strolling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stroll?
must you stroll?
must he stroll?
must we stroll?
must you stroll?
must they stroll? 	must I be strolling?
must you be strolling?
must he be strolling?
must we be strolling?
must you be strolling?
must they be strolling? 	must I have strolled?
must you have strolled?
must he have strolled?
must we have strolled?
must you have strolled?
must they have strolled? 	must I have been strolling?
must you have been strolling?
must he have been strolling?
must we have been strolling?
must you have been strolling?
must they have been strolling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stroll?
mustn't you stroll?
mustn't he stroll?
mustn't we stroll?
mustn't you stroll?
mustn't they stroll? 	mustn't I be strolling?
mustn't you be strolling?
mustn't he be strolling?
mustn't we be strolling?
mustn't you be strolling?
mustn't they be strolling? 	mustn't I have strolled?
mustn't you have strolled?
mustn't he have strolled?
mustn't we have strolled?
mustn't you have strolled?
mustn't they have strolled? 	mustn't I have been strolling?
mustn't you have been strolling?
mustn't he have been strolling?
mustn't we have been strolling?
mustn't you have been strolling?
mustn't they have been strolling?