English verb conjugation
CAN HORN

Regular verb: horn - horned - horned

Affirmation

Simple form	V-ing form
I can horn you can horn he can horn we can horn you can horn they can horn	I can be horning you can be horning he can be horning we can be horning you can be horning they can be horning
Perfect	V-ing perfect
I can have horned you can have horned he can have horned we can have horned you can have horned they can have horned	I can have been horning you can have been horning he can have been horning we can have been horning you can have been horning they can have been horning

Negation

Simple form	V-ing form
I cannot horn you cannot horn he cannot horn we cannot horn you cannot horn they cannot horn	I cannot be horning you cannot be horning he cannot be horning we cannot be horning you cannot be horning they cannot be horning
Perfect	V-ing perfect
I cannot have horned you cannot have horned he cannot have horned we cannot have horned you cannot have horned they cannot have horned	I cannot have been horning you cannot have been horning he cannot have been horning we cannot have been horning you cannot have been horning they cannot have been horning

Interrogative form

Simple form	V-ing form
can I horn? can you horn? can he horn? can we horn? can you horn? can they horn?	can I be horning? can you be horning? can he be horning? can we be horning? can you be horning? can they be horning?
Perfect	V-ing perfect
can I have horned? can you have horned? can he have horned? can we have horned? can you have horned? can they have horned?	can I have been horning? can you have been horning? can he have been horning? can we have been horning? can you have been horning? can they have been horning?

Interro-negative form

Simple form	V-ing form
can I not horn? can you not horn? can he not horn? can we not horn? can you not horn? can they not horn?	can I not be horning? can you not be horning? can he not be horning? can we not be horning? can you not be horning? can they not be horning?
Perfect	V-ing perfect
can I not have horned? can you not have horned? can he not have horned? can we not have horned? can you not have horned? can they not have horned?	can I not have been horning? can you not have been horning? can he not have been horning? can we not have been horning? can you not have been horning? can they not have been horning?