English verb conjugation
CAN VACATION

Regular verb: vacation - vacationed - vacationed

Affirmation

Simple form	V-ing form
I can vacation you can vacation he can vacation we can vacation you can vacation they can vacation	I can be vacationing you can be vacationing he can be vacationing we can be vacationing you can be vacationing they can be vacationing
Perfect	V-ing perfect
I can have vacationed you can have vacationed he can have vacationed we can have vacationed you can have vacationed they can have vacationed	I can have been vacationing you can have been vacationing he can have been vacationing we can have been vacationing you can have been vacationing they can have been vacationing

Negation

Simple form	V-ing form
I can't vacation you can't vacation he can't vacation we can't vacation you can't vacation they can't vacation	I can't be vacationing you can't be vacationing he can't be vacationing we can't be vacationing you can't be vacationing they can't be vacationing
Perfect	V-ing perfect
I can't have vacationed you can't have vacationed he can't have vacationed we can't have vacationed you can't have vacationed they can't have vacationed	I can't have been vacationing you can't have been vacationing he can't have been vacationing we can't have been vacationing you can't have been vacationing they can't have been vacationing

Interrogative form

Simple form	V-ing form
can I vacation? can you vacation? can he vacation? can we vacation? can you vacation? can they vacation?	can I be vacationing? can you be vacationing? can he be vacationing? can we be vacationing? can you be vacationing? can they be vacationing?
Perfect	V-ing perfect
can I have vacationed? can you have vacationed? can he have vacationed? can we have vacationed? can you have vacationed? can they have vacationed?	can I have been vacationing? can you have been vacationing? can he have been vacationing? can we have been vacationing? can you have been vacationing? can they have been vacationing?

Interro-negative form

Simple form	V-ing form
can't I vacation? can't you vacation? can't he vacation? can't we vacation? can't you vacation? can't they vacation?	can't I be vacationing? can't you be vacationing? can't he be vacationing? can't we be vacationing? can't you be vacationing? can't they be vacationing?
Perfect	V-ing perfect
can't I have vacationed? can't you have vacationed? can't he have vacationed? can't we have vacationed? can't you have vacationed? can't they have vacationed?	can't I have been vacationing? can't you have been vacationing? can't he have been vacationing? can't we have been vacationing? can't you have been vacationing? can't they have been vacationing?