English verb conjugation
CAN BARN

Regular verb: barn - barned - barned

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?