must snowboard
Regular verb: snowboard - snowboarded- snowboarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must snowboard
you must snowboard
she must snowboard
we must snowboard
you must snowboard
they must snowboard 	I must be snowboarding
you must be snowboarding
she must be snowboarding
we must be snowboarding
you must be snowboarding
they must be snowboarding	I must have snowboarded
you must have snowboarded
she must have snowboarded
we must have snowboarded
you must have snowboarded
they must have snowboarded	I must have been snowboarding
you must have been snowboarding
she must have been snowboarding
we must have been snowboarding
you must have been snowboarding
they must have been snowboarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't snowboard
you mustn't snowboard
she mustn't snowboard
we mustn't snowboard
you mustn't snowboard
they mustn't snowboard 	I mustn't be snowboarding
you mustn't be snowboarding
she mustn't be snowboarding
we mustn't be snowboarding
you mustn't be snowboarding
they mustn't be snowboarding	I mustn't have snowboarded
you mustn't have snowboarded
she mustn't have snowboarded
we mustn't have snowboarded
you mustn't have snowboarded
they mustn't have snowboarded	I mustn't have been snowboarding
you mustn't have been snowboarding
she mustn't have been snowboarding
we mustn't have been snowboarding
you mustn't have been snowboarding
they mustn't have been snowboarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I snowboard?
must you snowboard?
must she snowboard?
must we snowboard?
must you snowboard?
must they snowboard? 	must I be snowboarding?
must you be snowboarding?
must she be snowboarding?
must we be snowboarding?
must you be snowboarding?
must they be snowboarding? 	must I have snowboarded?
must you have snowboarded?
must she have snowboarded?
must we have snowboarded?
must you have snowboarded?
must they have snowboarded? 	must I have been snowboarding?
must you have been snowboarding?
must she have been snowboarding?
must we have been snowboarding?
must you have been snowboarding?
must they have been snowboarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I snowboard?
mustn't you snowboard?
mustn't she snowboard?
mustn't we snowboard?
mustn't you snowboard?
mustn't they snowboard? 	mustn't I be snowboarding?
mustn't you be snowboarding?
mustn't she be snowboarding?
mustn't we be snowboarding?
mustn't you be snowboarding?
mustn't they be snowboarding? 	mustn't I have snowboarded?
mustn't you have snowboarded?
mustn't she have snowboarded?
mustn't we have snowboarded?
mustn't you have snowboarded?
mustn't they have snowboarded? 	mustn't I have been snowboarding?
mustn't you have been snowboarding?
mustn't she have been snowboarding?
mustn't we have been snowboarding?
mustn't you have been snowboarding?
mustn't they have been snowboarding?