must cramp
Regular verb: cramp - cramped- cramped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cramp
you must cramp
he must cramp
we must cramp
you must cramp
they must cramp 	I must be cramping
you must be cramping
he must be cramping
we must be cramping
you must be cramping
they must be cramping	I must have cramped
you must have cramped
he must have cramped
we must have cramped
you must have cramped
they must have cramped	I must have been cramping
you must have been cramping
he must have been cramping
we must have been cramping
you must have been cramping
they must have been cramping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't cramp
you mustn't cramp
he mustn't cramp
we mustn't cramp
you mustn't cramp
they mustn't cramp 	I mustn't be cramping
you mustn't be cramping
he mustn't be cramping
we mustn't be cramping
you mustn't be cramping
they mustn't be cramping	I mustn't have cramped
you mustn't have cramped
he mustn't have cramped
we mustn't have cramped
you mustn't have cramped
they mustn't have cramped	I mustn't have been cramping
you mustn't have been cramping
he mustn't have been cramping
we mustn't have been cramping
you mustn't have been cramping
they mustn't have been cramping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I cramp?
must you cramp?
must he cramp?
must we cramp?
must you cramp?
must they cramp? 	must I be cramping?
must you be cramping?
must he be cramping?
must we be cramping?
must you be cramping?
must they be cramping? 	must I have cramped?
must you have cramped?
must he have cramped?
must we have cramped?
must you have cramped?
must they have cramped? 	must I have been cramping?
must you have been cramping?
must he have been cramping?
must we have been cramping?
must you have been cramping?
must they have been cramping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I cramp?
mustn't you cramp?
mustn't he cramp?
mustn't we cramp?
mustn't you cramp?
mustn't they cramp? 	mustn't I be cramping?
mustn't you be cramping?
mustn't he be cramping?
mustn't we be cramping?
mustn't you be cramping?
mustn't they be cramping? 	mustn't I have cramped?
mustn't you have cramped?
mustn't he have cramped?
mustn't we have cramped?
mustn't you have cramped?
mustn't they have cramped? 	mustn't I have been cramping?
mustn't you have been cramping?
mustn't he have been cramping?
mustn't we have been cramping?
mustn't you have been cramping?
mustn't they have been cramping?