English verb conjugation
CAN PEEN

Regular verb: peen - peened - peened

Affirmation

Simple form	V-ing form
I can peen you can peen he can peen we can peen you can peen they can peen	I can be peening you can be peening he can be peening we can be peening you can be peening they can be peening
Perfect	V-ing perfect
I can have peened you can have peened he can have peened we can have peened you can have peened they can have peened	I can have been peening you can have been peening he can have been peening we can have been peening you can have been peening they can have been peening

Negation

Simple form	V-ing form
I cannot peen you cannot peen he cannot peen we cannot peen you cannot peen they cannot peen	I cannot be peening you cannot be peening he cannot be peening we cannot be peening you cannot be peening they cannot be peening
Perfect	V-ing perfect
I cannot have peened you cannot have peened he cannot have peened we cannot have peened you cannot have peened they cannot have peened	I cannot have been peening you cannot have been peening he cannot have been peening we cannot have been peening you cannot have been peening they cannot have been peening

Interrogative form

Simple form	V-ing form
can I peen? can you peen? can he peen? can we peen? can you peen? can they peen?	can I be peening? can you be peening? can he be peening? can we be peening? can you be peening? can they be peening?
Perfect	V-ing perfect
can I have peened? can you have peened? can he have peened? can we have peened? can you have peened? can they have peened?	can I have been peening? can you have been peening? can he have been peening? can we have been peening? can you have been peening? can they have been peening?

Interro-negative form

Simple form	V-ing form
can I not peen? can you not peen? can he not peen? can we not peen? can you not peen? can they not peen?	can I not be peening? can you not be peening? can he not be peening? can we not be peening? can you not be peening? can they not be peening?
Perfect	V-ing perfect
can I not have peened? can you not have peened? can he not have peened? can we not have peened? can you not have peened? can they not have peened?	can I not have been peening? can you not have been peening? can he not have been peening? can we not have been peening? can you not have been peening? can they not have been peening?