English verb conjugation
CAN BUFF

Regular verb: buff - buffed - buffed

Affirmation

Simple form	V-ing form
I can buff you can buff he can buff we can buff you can buff they can buff	I can be buffing you can be buffing he can be buffing we can be buffing you can be buffing they can be buffing
Perfect	V-ing perfect
I can have buffed you can have buffed he can have buffed we can have buffed you can have buffed they can have buffed	I can have been buffing you can have been buffing he can have been buffing we can have been buffing you can have been buffing they can have been buffing

Negation

Simple form	V-ing form
I cannot buff you cannot buff he cannot buff we cannot buff you cannot buff they cannot buff	I cannot be buffing you cannot be buffing he cannot be buffing we cannot be buffing you cannot be buffing they cannot be buffing
Perfect	V-ing perfect
I cannot have buffed you cannot have buffed he cannot have buffed we cannot have buffed you cannot have buffed they cannot have buffed	I cannot have been buffing you cannot have been buffing he cannot have been buffing we cannot have been buffing you cannot have been buffing they cannot have been buffing

Interrogative form

Simple form	V-ing form
can I buff? can you buff? can he buff? can we buff? can you buff? can they buff?	can I be buffing? can you be buffing? can he be buffing? can we be buffing? can you be buffing? can they be buffing?
Perfect	V-ing perfect
can I have buffed? can you have buffed? can he have buffed? can we have buffed? can you have buffed? can they have buffed?	can I have been buffing? can you have been buffing? can he have been buffing? can we have been buffing? can you have been buffing? can they have been buffing?

Interro-negative form

Simple form	V-ing form
can I not buff? can you not buff? can he not buff? can we not buff? can you not buff? can they not buff?	can I not be buffing? can you not be buffing? can he not be buffing? can we not be buffing? can you not be buffing? can they not be buffing?
Perfect	V-ing perfect
can I not have buffed? can you not have buffed? can he not have buffed? can we not have buffed? can you not have buffed? can they not have buffed?	can I not have been buffing? can you not have been buffing? can he not have been buffing? can we not have been buffing? can you not have been buffing? can they not have been buffing?