must snowboard
Verbo regular: snowboard - snowboarded- snowboarded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must snowboard
you must snowboard
he must snowboard
we must snowboard
you must snowboard
they must snowboard 	I must be snowboarding
you must be snowboarding
he must be snowboarding
we must be snowboarding
you must be snowboarding
they must be snowboarding	I must have snowboarded
you must have snowboarded
he 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
he must have been snowboarding
we must have been snowboarding
you must have been snowboarding
they must have been snowboarding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not snowboard
you must not snowboard
he must not snowboard
we must not snowboard
you must not snowboard
they must not snowboard 	I must not be snowboarding
you must not be snowboarding
he must not be snowboarding
we must not be snowboarding
you must not be snowboarding
they must not be snowboarding	I must not have snowboarded
you must not have snowboarded
he must not have snowboarded
we must not have snowboarded
you must not have snowboarded
they must not have snowboarded	I must not have been snowboarding
you must not have been snowboarding
he must not have been snowboarding
we must not have been snowboarding
you must not have been snowboarding
they must not have been snowboarding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I snowboard?
must you snowboard?
must he snowboard?
must we snowboard?
must you snowboard?
must they snowboard? 	must I be snowboarding?
must you be snowboarding?
must he be snowboarding?
must we be snowboarding?
must you be snowboarding?
must they be snowboarding? 	must I have snowboarded?
must you have snowboarded?
must he 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 he have been snowboarding?
must we have been snowboarding?
must you have been snowboarding?
must they have been snowboarding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not snowboard?
must you not snowboard?
must he not snowboard?
must we not snowboard?
must you not snowboard?
must they not snowboard? 	must I not be snowboarding?
must you not be snowboarding?
must he not be snowboarding?
must we not be snowboarding?
must you not be snowboarding?
must they not be snowboarding? 	must I not have snowboarded?
must you not have snowboarded?
must he not have snowboarded?
must we not have snowboarded?
must you not have snowboarded?
must they not have snowboarded? 	must I not have been snowboarding?
must you not have been snowboarding?
must he not have been snowboarding?
must we not have been snowboarding?
must you not have been snowboarding?
must they not have been snowboarding?