English verb conjugation
MUST CUFF

Regular verb: cuff - cuffed - cuffed

Affirmation

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

Negation

Simple form	V-ing form
I must not cuff you must not cuff she must not cuff we must not cuff you must not cuff they must not cuff	I must not be cuffing you must not be cuffing she must not be cuffing we must not be cuffing you must not be cuffing they must not be cuffing
Perfect	V-ing perfect
I must not have cuffed you must not have cuffed she must not have cuffed we must not have cuffed you must not have cuffed they must not have cuffed	I must not have been cuffing you must not have been cuffing she must not have been cuffing we must not have been cuffing you must not have been cuffing they must not have been cuffing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
must I not cuff? must you not cuff? must she not cuff? must we not cuff? must you not cuff? must they not cuff?	must I not be cuffing? must you not be cuffing? must she not be cuffing? must we not be cuffing? must you not be cuffing? must they not be cuffing?
Perfect	V-ing perfect
must I not have cuffed? must you not have cuffed? must she not have cuffed? must we not have cuffed? must you not have cuffed? must they not have cuffed?	must I not have been cuffing? must you not have been cuffing? must she not have been cuffing? must we not have been cuffing? must you not have been cuffing? must they not have been cuffing?