can vacation
Regular verb: vacation - vacationed- vacationed

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