English verb conjugation
COULD CHUFF

Regular verb: chuff - chuffed - chuffed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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