English verb conjugation
CAN CHUFF

Regular verb: chuff - chuffed - chuffed

Affirmation

Simple form	V-ing form
I can chuff you can chuff he can chuff we can chuff you can chuff they can chuff	I can be chuffing you can be chuffing he 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 he 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 he 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 can't chuff you can't chuff he can't chuff we can't chuff you can't chuff they can't chuff	I can't be chuffing you can't be chuffing he can't be chuffing we can't be chuffing you can't be chuffing they can't be chuffing
Perfect	V-ing perfect
I can't have chuffed you can't have chuffed he can't have chuffed we can't have chuffed you can't have chuffed they can't have chuffed	I can't have been chuffing you can't have been chuffing he can't have been chuffing we can't have been chuffing you can't have been chuffing they can't have been chuffing

Interrogative form

Simple form	V-ing form
can I chuff? can you chuff? can he chuff? can we chuff? can you chuff? can they chuff?	can I be chuffing? can you be chuffing? can he 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 he 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 he 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't I chuff? can't you chuff? can't he chuff? can't we chuff? can't you chuff? can't they chuff?	can't I be chuffing? can't you be chuffing? can't he be chuffing? can't we be chuffing? can't you be chuffing? can't they be chuffing?
Perfect	V-ing perfect
can't I have chuffed? can't you have chuffed? can't he have chuffed? can't we have chuffed? can't you have chuffed? can't they have chuffed?	can't I have been chuffing? can't you have been chuffing? can't he have been chuffing? can't we have been chuffing? can't you have been chuffing? can't they have been chuffing?