must gumshoe
Regular verb: gumshoe - gumshoed- gumshoed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must gumshoe
you must gumshoe
he must gumshoe
we must gumshoe
you must gumshoe
they must gumshoe 	I must be gumshoing
you must be gumshoing
he must be gumshoing
we must be gumshoing
you must be gumshoing
they must be gumshoing	I must have gumshoed
you must have gumshoed
he must have gumshoed
we must have gumshoed
you must have gumshoed
they must have gumshoed	I must have been gumshoing
you must have been gumshoing
he must have been gumshoing
we must have been gumshoing
you must have been gumshoing
they must have been gumshoing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't gumshoe
you mustn't gumshoe
he mustn't gumshoe
we mustn't gumshoe
you mustn't gumshoe
they mustn't gumshoe 	I mustn't be gumshoing
you mustn't be gumshoing
he mustn't be gumshoing
we mustn't be gumshoing
you mustn't be gumshoing
they mustn't be gumshoing	I mustn't have gumshoed
you mustn't have gumshoed
he mustn't have gumshoed
we mustn't have gumshoed
you mustn't have gumshoed
they mustn't have gumshoed	I mustn't have been gumshoing
you mustn't have been gumshoing
he mustn't have been gumshoing
we mustn't have been gumshoing
you mustn't have been gumshoing
they mustn't have been gumshoing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I gumshoe?
must you gumshoe?
must he gumshoe?
must we gumshoe?
must you gumshoe?
must they gumshoe? 	must I be gumshoing?
must you be gumshoing?
must he be gumshoing?
must we be gumshoing?
must you be gumshoing?
must they be gumshoing? 	must I have gumshoed?
must you have gumshoed?
must he have gumshoed?
must we have gumshoed?
must you have gumshoed?
must they have gumshoed? 	must I have been gumshoing?
must you have been gumshoing?
must he have been gumshoing?
must we have been gumshoing?
must you have been gumshoing?
must they have been gumshoing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I gumshoe?
mustn't you gumshoe?
mustn't he gumshoe?
mustn't we gumshoe?
mustn't you gumshoe?
mustn't they gumshoe? 	mustn't I be gumshoing?
mustn't you be gumshoing?
mustn't he be gumshoing?
mustn't we be gumshoing?
mustn't you be gumshoing?
mustn't they be gumshoing? 	mustn't I have gumshoed?
mustn't you have gumshoed?
mustn't he have gumshoed?
mustn't we have gumshoed?
mustn't you have gumshoed?
mustn't they have gumshoed? 	mustn't I have been gumshoing?
mustn't you have been gumshoing?
mustn't he have been gumshoing?
mustn't we have been gumshoing?
mustn't you have been gumshoing?
mustn't they have been gumshoing?