must stump
Regular verb: stump - stumped- stumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stump
you must stump
she must stump
we must stump
you must stump
they must stump 	I must be stumping
you must be stumping
she must be stumping
we must be stumping
you must be stumping
they must be stumping	I must have stumped
you must have stumped
she must have stumped
we must have stumped
you must have stumped
they must have stumped	I must have been stumping
you must have been stumping
she must have been stumping
we must have been stumping
you must have been stumping
they must have been stumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stump
you mustn't stump
she mustn't stump
we mustn't stump
you mustn't stump
they mustn't stump 	I mustn't be stumping
you mustn't be stumping
she mustn't be stumping
we mustn't be stumping
you mustn't be stumping
they mustn't be stumping	I mustn't have stumped
you mustn't have stumped
she mustn't have stumped
we mustn't have stumped
you mustn't have stumped
they mustn't have stumped	I mustn't have been stumping
you mustn't have been stumping
she mustn't have been stumping
we mustn't have been stumping
you mustn't have been stumping
they mustn't have been stumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stump?
must you stump?
must she stump?
must we stump?
must you stump?
must they stump? 	must I be stumping?
must you be stumping?
must she be stumping?
must we be stumping?
must you be stumping?
must they be stumping? 	must I have stumped?
must you have stumped?
must she have stumped?
must we have stumped?
must you have stumped?
must they have stumped? 	must I have been stumping?
must you have been stumping?
must she have been stumping?
must we have been stumping?
must you have been stumping?
must they have been stumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stump?
mustn't you stump?
mustn't she stump?
mustn't we stump?
mustn't you stump?
mustn't they stump? 	mustn't I be stumping?
mustn't you be stumping?
mustn't she be stumping?
mustn't we be stumping?
mustn't you be stumping?
mustn't they be stumping? 	mustn't I have stumped?
mustn't you have stumped?
mustn't she have stumped?
mustn't we have stumped?
mustn't you have stumped?
mustn't they have stumped? 	mustn't I have been stumping?
mustn't you have been stumping?
mustn't she have been stumping?
mustn't we have been stumping?
mustn't you have been stumping?
mustn't they have been stumping?