must scrump
Regular verb: scrump - scrumped- scrumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scrump
you must scrump
he must scrump
we must scrump
you must scrump
they must scrump 	I must be scrumping
you must be scrumping
he must be scrumping
we must be scrumping
you must be scrumping
they must be scrumping	I must have scrumped
you must have scrumped
he must have scrumped
we must have scrumped
you must have scrumped
they must have scrumped	I must have been scrumping
you must have been scrumping
he must have been scrumping
we must have been scrumping
you must have been scrumping
they must have been scrumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't scrump
you mustn't scrump
he mustn't scrump
we mustn't scrump
you mustn't scrump
they mustn't scrump 	I mustn't be scrumping
you mustn't be scrumping
he mustn't be scrumping
we mustn't be scrumping
you mustn't be scrumping
they mustn't be scrumping	I mustn't have scrumped
you mustn't have scrumped
he mustn't have scrumped
we mustn't have scrumped
you mustn't have scrumped
they mustn't have scrumped	I mustn't have been scrumping
you mustn't have been scrumping
he mustn't have been scrumping
we mustn't have been scrumping
you mustn't have been scrumping
they mustn't have been scrumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scrump?
must you scrump?
must he scrump?
must we scrump?
must you scrump?
must they scrump? 	must I be scrumping?
must you be scrumping?
must he be scrumping?
must we be scrumping?
must you be scrumping?
must they be scrumping? 	must I have scrumped?
must you have scrumped?
must he have scrumped?
must we have scrumped?
must you have scrumped?
must they have scrumped? 	must I have been scrumping?
must you have been scrumping?
must he have been scrumping?
must we have been scrumping?
must you have been scrumping?
must they have been scrumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I scrump?
mustn't you scrump?
mustn't he scrump?
mustn't we scrump?
mustn't you scrump?
mustn't they scrump? 	mustn't I be scrumping?
mustn't you be scrumping?
mustn't he be scrumping?
mustn't we be scrumping?
mustn't you be scrumping?
mustn't they be scrumping? 	mustn't I have scrumped?
mustn't you have scrumped?
mustn't he have scrumped?
mustn't we have scrumped?
mustn't you have scrumped?
mustn't they have scrumped? 	mustn't I have been scrumping?
mustn't you have been scrumping?
mustn't he have been scrumping?
mustn't we have been scrumping?
mustn't you have been scrumping?
mustn't they have been scrumping?