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 can't buff you can't buff he can't buff we can't buff you can't buff they can't buff	I can't be buffing you can't be buffing he can't be buffing we can't be buffing you can't be buffing they can't be buffing
Perfect	V-ing perfect
I can't have buffed you can't have buffed he can't have buffed we can't have buffed you can't have buffed they can't have buffed	I can't have been buffing you can't have been buffing he can't have been buffing we can't have been buffing you can't have been buffing they can't 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't I buff? can't you buff? can't he buff? can't we buff? can't you buff? can't they buff?	can't I be buffing? can't you be buffing? can't he be buffing? can't we be buffing? can't you be buffing? can't they be buffing?
Perfect	V-ing perfect
can't I have buffed? can't you have buffed? can't he have buffed? can't we have buffed? can't you have buffed? can't they have buffed?	can't I have been buffing? can't you have been buffing? can't he have been buffing? can't we have been buffing? can't you have been buffing? can't they have been buffing?