must frolic
Regular verb: frolic - froliced- froliced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must frolic
you must frolic
he must frolic
we must frolic
you must frolic
they must frolic 	I must be frolicing
you must be frolicing
he must be frolicing
we must be frolicing
you must be frolicing
they must be frolicing	I must have froliced
you must have froliced
he must have froliced
we must have froliced
you must have froliced
they must have froliced	I must have been frolicing
you must have been frolicing
he must have been frolicing
we must have been frolicing
you must have been frolicing
they must have been frolicing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't frolic
you mustn't frolic
he mustn't frolic
we mustn't frolic
you mustn't frolic
they mustn't frolic 	I mustn't be frolicing
you mustn't be frolicing
he mustn't be frolicing
we mustn't be frolicing
you mustn't be frolicing
they mustn't be frolicing	I mustn't have froliced
you mustn't have froliced
he mustn't have froliced
we mustn't have froliced
you mustn't have froliced
they mustn't have froliced	I mustn't have been frolicing
you mustn't have been frolicing
he mustn't have been frolicing
we mustn't have been frolicing
you mustn't have been frolicing
they mustn't have been frolicing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I frolic?
must you frolic?
must he frolic?
must we frolic?
must you frolic?
must they frolic? 	must I be frolicing?
must you be frolicing?
must he be frolicing?
must we be frolicing?
must you be frolicing?
must they be frolicing? 	must I have froliced?
must you have froliced?
must he have froliced?
must we have froliced?
must you have froliced?
must they have froliced? 	must I have been frolicing?
must you have been frolicing?
must he have been frolicing?
must we have been frolicing?
must you have been frolicing?
must they have been frolicing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I frolic?
mustn't you frolic?
mustn't he frolic?
mustn't we frolic?
mustn't you frolic?
mustn't they frolic? 	mustn't I be frolicing?
mustn't you be frolicing?
mustn't he be frolicing?
mustn't we be frolicing?
mustn't you be frolicing?
mustn't they be frolicing? 	mustn't I have froliced?
mustn't you have froliced?
mustn't he have froliced?
mustn't we have froliced?
mustn't you have froliced?
mustn't they have froliced? 	mustn't I have been frolicing?
mustn't you have been frolicing?
mustn't he have been frolicing?
mustn't we have been frolicing?
mustn't you have been frolicing?
mustn't they have been frolicing?