English verb conjugation
CAN CHUFF

Regular verb: chuff - chuffed - chuffed

Affirmation

Simple form	V-ing form
I can chuff you can chuff she can chuff we can chuff you can chuff they can chuff	I can be chuffing you can be chuffing she can be chuffing we can be chuffing you can be chuffing they can be chuffing
Perfect	V-ing perfect
I can have chuffed you can have chuffed she can have chuffed we can have chuffed you can have chuffed they can have chuffed	I can have been chuffing you can have been chuffing she can have been chuffing we can have been chuffing you can have been chuffing they can have been chuffing

Negation

Simple form	V-ing form
I cannot chuff you cannot chuff she cannot chuff we cannot chuff you cannot chuff they cannot chuff	I cannot be chuffing you cannot be chuffing she cannot be chuffing we cannot be chuffing you cannot be chuffing they cannot be chuffing
Perfect	V-ing perfect
I cannot have chuffed you cannot have chuffed she cannot have chuffed we cannot have chuffed you cannot have chuffed they cannot have chuffed	I cannot have been chuffing you cannot have been chuffing she cannot have been chuffing we cannot have been chuffing you cannot have been chuffing they cannot have been chuffing

Interrogative form

Simple form	V-ing form
can I chuff? can you chuff? can she chuff? can we chuff? can you chuff? can they chuff?	can I be chuffing? can you be chuffing? can she be chuffing? can we be chuffing? can you be chuffing? can they be chuffing?
Perfect	V-ing perfect
can I have chuffed? can you have chuffed? can she have chuffed? can we have chuffed? can you have chuffed? can they have chuffed?	can I have been chuffing? can you have been chuffing? can she have been chuffing? can we have been chuffing? can you have been chuffing? can they have been chuffing?

Interro-negative form

Simple form	V-ing form
can I not chuff? can you not chuff? can she not chuff? can we not chuff? can you not chuff? can they not chuff?	can I not be chuffing? can you not be chuffing? can she not be chuffing? can we not be chuffing? can you not be chuffing? can they not be chuffing?
Perfect	V-ing perfect
can I not have chuffed? can you not have chuffed? can she not have chuffed? can we not have chuffed? can you not have chuffed? can they not have chuffed?	can I not have been chuffing? can you not have been chuffing? can she not have been chuffing? can we not have been chuffing? can you not have been chuffing? can they not have been chuffing?