English verb conjugation
COULD CUFF

Regular verb: cuff - cuffed - cuffed

Affirmation

Simple form	V-ing form
I could cuff you could cuff he could cuff we could cuff you could cuff they could cuff	I could be cuffing you could be cuffing he could be cuffing we could be cuffing you could be cuffing they could be cuffing
Perfect	V-ing perfect
I could have cuffed you could have cuffed he could have cuffed we could have cuffed you could have cuffed they could have cuffed	I could have been cuffing you could have been cuffing he could have been cuffing we could have been cuffing you could have been cuffing they could have been cuffing

Negation

Simple form	V-ing form
I couldn't cuff you couldn't cuff he couldn't cuff we couldn't cuff you couldn't cuff they couldn't cuff	I couldn't be cuffing you couldn't be cuffing he couldn't be cuffing we couldn't be cuffing you couldn't be cuffing they couldn't be cuffing
Perfect	V-ing perfect
I couldn't have cuffed you couldn't have cuffed he couldn't have cuffed we couldn't have cuffed you couldn't have cuffed they couldn't have cuffed	I couldn't have been cuffing you couldn't have been cuffing he couldn't have been cuffing we couldn't have been cuffing you couldn't have been cuffing they couldn't have been cuffing

Interrogative form

Simple form	V-ing form
could I cuff? could you cuff? could he cuff? could we cuff? could you cuff? could they cuff?	could I be cuffing? could you be cuffing? could he be cuffing? could we be cuffing? could you be cuffing? could they be cuffing?
Perfect	V-ing perfect
could I have cuffed? could you have cuffed? could he have cuffed? could we have cuffed? could you have cuffed? could they have cuffed?	could I have been cuffing? could you have been cuffing? could he have been cuffing? could we have been cuffing? could you have been cuffing? could they have been cuffing?

Interro-negative form

Simple form	V-ing form
couldn't I cuff? couldn't you cuff? couldn't he cuff? couldn't we cuff? couldn't you cuff? couldn't they cuff?	couldn't I be cuffing? couldn't you be cuffing? couldn't he be cuffing? couldn't we be cuffing? couldn't you be cuffing? couldn't they be cuffing?
Perfect	V-ing perfect
couldn't I have cuffed? couldn't you have cuffed? couldn't he have cuffed? couldn't we have cuffed? couldn't you have cuffed? couldn't they have cuffed?	couldn't I have been cuffing? couldn't you have been cuffing? couldn't he have been cuffing? couldn't we have been cuffing? couldn't you have been cuffing? couldn't they have been cuffing?