English verb conjugation
CAN SKATEBOARD

Regular verb: skateboard - skateboarded - skateboarded

Affirmation

Simple form	V-ing form
I can skateboard you can skateboard he can skateboard we can skateboard you can skateboard they can skateboard	I can be skateboarding you can be skateboarding he can be skateboarding we can be skateboarding you can be skateboarding they can be skateboarding
Perfect	V-ing perfect
I can have skateboarded you can have skateboarded he can have skateboarded we can have skateboarded you can have skateboarded they can have skateboarded	I can have been skateboarding you can have been skateboarding he can have been skateboarding we can have been skateboarding you can have been skateboarding they can have been skateboarding

Negation

Simple form	V-ing form
I can't skateboard you can't skateboard he can't skateboard we can't skateboard you can't skateboard they can't skateboard	I can't be skateboarding you can't be skateboarding he can't be skateboarding we can't be skateboarding you can't be skateboarding they can't be skateboarding
Perfect	V-ing perfect
I can't have skateboarded you can't have skateboarded he can't have skateboarded we can't have skateboarded you can't have skateboarded they can't have skateboarded	I can't have been skateboarding you can't have been skateboarding he can't have been skateboarding we can't have been skateboarding you can't have been skateboarding they can't have been skateboarding

Interrogative form

Simple form	V-ing form
can I skateboard? can you skateboard? can he skateboard? can we skateboard? can you skateboard? can they skateboard?	can I be skateboarding? can you be skateboarding? can he be skateboarding? can we be skateboarding? can you be skateboarding? can they be skateboarding?
Perfect	V-ing perfect
can I have skateboarded? can you have skateboarded? can he have skateboarded? can we have skateboarded? can you have skateboarded? can they have skateboarded?	can I have been skateboarding? can you have been skateboarding? can he have been skateboarding? can we have been skateboarding? can you have been skateboarding? can they have been skateboarding?

Interro-negative form

Simple form	V-ing form
can't I skateboard? can't you skateboard? can't he skateboard? can't we skateboard? can't you skateboard? can't they skateboard?	can't I be skateboarding? can't you be skateboarding? can't he be skateboarding? can't we be skateboarding? can't you be skateboarding? can't they be skateboarding?
Perfect	V-ing perfect
can't I have skateboarded? can't you have skateboarded? can't he have skateboarded? can't we have skateboarded? can't you have skateboarded? can't they have skateboarded?	can't I have been skateboarding? can't you have been skateboarding? can't he have been skateboarding? can't we have been skateboarding? can't you have been skateboarding? can't they have been skateboarding?