English verb conjugation
CAN SKATEBOARD

Regular verb: skateboard - skateboarded - skateboarded

Affirmation

Simple form	V-ing form
I can skateboard you can skateboard she can skateboard we can skateboard you can skateboard they can skateboard	I can be skateboarding you can be skateboarding she 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 she 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 she 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 she 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 she 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 she 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 she 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 she skateboard? can we skateboard? can you skateboard? can they skateboard?	can I be skateboarding? can you be skateboarding? can she 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 she 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 she 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 she 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 she 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 she 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 she have been skateboarding? can't we have been skateboarding? can't you have been skateboarding? can't they have been skateboarding?