English verb conjugation
CAN BILLBOARD

Regular verb: billboard - billboarded - billboarded

Affirmation

Simple form	V-ing form
I can billboard you can billboard he can billboard we can billboard you can billboard they can billboard	I can be billboarding you can be billboarding he can be billboarding we can be billboarding you can be billboarding they can be billboarding
Perfect	V-ing perfect
I can have billboarded you can have billboarded he can have billboarded we can have billboarded you can have billboarded they can have billboarded	I can have been billboarding you can have been billboarding he can have been billboarding we can have been billboarding you can have been billboarding they can have been billboarding

Negation

Simple form	V-ing form
I can't billboard you can't billboard he can't billboard we can't billboard you can't billboard they can't billboard	I can't be billboarding you can't be billboarding he can't be billboarding we can't be billboarding you can't be billboarding they can't be billboarding
Perfect	V-ing perfect
I can't have billboarded you can't have billboarded he can't have billboarded we can't have billboarded you can't have billboarded they can't have billboarded	I can't have been billboarding you can't have been billboarding he can't have been billboarding we can't have been billboarding you can't have been billboarding they can't have been billboarding

Interrogative form

Simple form	V-ing form
can I billboard? can you billboard? can he billboard? can we billboard? can you billboard? can they billboard?	can I be billboarding? can you be billboarding? can he be billboarding? can we be billboarding? can you be billboarding? can they be billboarding?
Perfect	V-ing perfect
can I have billboarded? can you have billboarded? can he have billboarded? can we have billboarded? can you have billboarded? can they have billboarded?	can I have been billboarding? can you have been billboarding? can he have been billboarding? can we have been billboarding? can you have been billboarding? can they have been billboarding?

Interro-negative form

Simple form	V-ing form
can't I billboard? can't you billboard? can't he billboard? can't we billboard? can't you billboard? can't they billboard?	can't I be billboarding? can't you be billboarding? can't he be billboarding? can't we be billboarding? can't you be billboarding? can't they be billboarding?
Perfect	V-ing perfect
can't I have billboarded? can't you have billboarded? can't he have billboarded? can't we have billboarded? can't you have billboarded? can't they have billboarded?	can't I have been billboarding? can't you have been billboarding? can't he have been billboarding? can't we have been billboarding? can't you have been billboarding? can't they have been billboarding?