English verb conjugation
CAN PREEN

Regular verb: preen - preened - preened

Affirmation

Simple form	V-ing form
I can preen you can preen she can preen we can preen you can preen they can preen	I can be preening you can be preening she can be preening we can be preening you can be preening they can be preening
Perfect	V-ing perfect
I can have preened you can have preened she can have preened we can have preened you can have preened they can have preened	I can have been preening you can have been preening she can have been preening we can have been preening you can have been preening they can have been preening

Negation

Simple form	V-ing form
I cannot preen you cannot preen she cannot preen we cannot preen you cannot preen they cannot preen	I cannot be preening you cannot be preening she cannot be preening we cannot be preening you cannot be preening they cannot be preening
Perfect	V-ing perfect
I cannot have preened you cannot have preened she cannot have preened we cannot have preened you cannot have preened they cannot have preened	I cannot have been preening you cannot have been preening she cannot have been preening we cannot have been preening you cannot have been preening they cannot have been preening

Interrogative form

Simple form	V-ing form
can I preen? can you preen? can she preen? can we preen? can you preen? can they preen?	can I be preening? can you be preening? can she be preening? can we be preening? can you be preening? can they be preening?
Perfect	V-ing perfect
can I have preened? can you have preened? can she have preened? can we have preened? can you have preened? can they have preened?	can I have been preening? can you have been preening? can she have been preening? can we have been preening? can you have been preening? can they have been preening?

Interro-negative form

Simple form	V-ing form
can I not preen? can you not preen? can she not preen? can we not preen? can you not preen? can they not preen?	can I not be preening? can you not be preening? can she not be preening? can we not be preening? can you not be preening? can they not be preening?
Perfect	V-ing perfect
can I not have preened? can you not have preened? can she not have preened? can we not have preened? can you not have preened? can they not have preened?	can I not have been preening? can you not have been preening? can she not have been preening? can we not have been preening? can you not have been preening? can they not have been preening?