English verb conjugation
COULD SNOWBOARD

Regular verb: snowboard - snowboarded - snowboarded

Affirmation

Simple form	V-ing form
I could snowboard you could snowboard he could snowboard we could snowboard you could snowboard they could snowboard	I could be snowboarding you could be snowboarding he could be snowboarding we could be snowboarding you could be snowboarding they could be snowboarding
Perfect	V-ing perfect
I could have snowboarded you could have snowboarded he could have snowboarded we could have snowboarded you could have snowboarded they could have snowboarded	I could have been snowboarding you could have been snowboarding he could have been snowboarding we could have been snowboarding you could have been snowboarding they could have been snowboarding

Negation

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

Interrogative form

Simple form	V-ing form
could I snowboard? could you snowboard? could he snowboard? could we snowboard? could you snowboard? could they snowboard?	could I be snowboarding? could you be snowboarding? could he be snowboarding? could we be snowboarding? could you be snowboarding? could they be snowboarding?
Perfect	V-ing perfect
could I have snowboarded? could you have snowboarded? could he have snowboarded? could we have snowboarded? could you have snowboarded? could they have snowboarded?	could I have been snowboarding? could you have been snowboarding? could he have been snowboarding? could we have been snowboarding? could you have been snowboarding? could they have been snowboarding?

Interro-negative form

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