English verb conjugation
MUST SNOWBOARD

Regular verb: snowboard - snowboarded - snowboarded

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

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

Interro-negative form

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