can barn
Regular verb: barn - barned- barned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can barn
you can barn
he can barn
we can barn
you can barn
they can barn 	I can be barning
you can be barning
he can be barning
we can be barning
you can be barning
they can be barning	I can have barned
you can have barned
he can have barned
we can have barned
you can have barned
they can have barned	I can have been barning
you can have been barning
he can have been barning
we can have been barning
you can have been barning
they can have been barning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't barn
you can't barn
he can't barn
we can't barn
you can't barn
they can't barn 	I can't be barning
you can't be barning
he can't be barning
we can't be barning
you can't be barning
they can't be barning	I can't have barned
you can't have barned
he can't have barned
we can't have barned
you can't have barned
they can't have barned	I can't have been barning
you can't have been barning
he can't have been barning
we can't have been barning
you can't have been barning
they can't have been barning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I barn?
can you barn?
can he barn?
can we barn?
can you barn?
can they barn? 	can I be barning?
can you be barning?
can he be barning?
can we be barning?
can you be barning?
can they be barning? 	can I have barned?
can you have barned?
can he have barned?
can we have barned?
can you have barned?
can they have barned? 	can I have been barning?
can you have been barning?
can he have been barning?
can we have been barning?
can you have been barning?
can they have been barning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I barn?
can't you barn?
can't he barn?
can't we barn?
can't you barn?
can't they barn? 	can't I be barning?
can't you be barning?
can't he be barning?
can't we be barning?
can't you be barning?
can't they be barning? 	can't I have barned?
can't you have barned?
can't he have barned?
can't we have barned?
can't you have barned?
can't they have barned? 	can't I have been barning?
can't you have been barning?
can't he have been barning?
can't we have been barning?
can't you have been barning?
can't they have been barning?