English verb conjugation
MUST REBUFF

Regular verb: rebuff - rebuffed - rebuffed

Affirmation

Simple form	V-ing form
I must rebuff you must rebuff he must rebuff we must rebuff you must rebuff they must rebuff	I must be rebuffing you must be rebuffing he must be rebuffing we must be rebuffing you must be rebuffing they must be rebuffing
Perfect	V-ing perfect
I must have rebuffed you must have rebuffed he must have rebuffed we must have rebuffed you must have rebuffed they must have rebuffed	I must have been rebuffing you must have been rebuffing he must have been rebuffing we must have been rebuffing you must have been rebuffing they must have been rebuffing

Negation

Simple form	V-ing form
I must not rebuff you must not rebuff he must not rebuff we must not rebuff you must not rebuff they must not rebuff	I must not be rebuffing you must not be rebuffing he must not be rebuffing we must not be rebuffing you must not be rebuffing they must not be rebuffing
Perfect	V-ing perfect
I must not have rebuffed you must not have rebuffed he must not have rebuffed we must not have rebuffed you must not have rebuffed they must not have rebuffed	I must not have been rebuffing you must not have been rebuffing he must not have been rebuffing we must not have been rebuffing you must not have been rebuffing they must not have been rebuffing

Interrogative form

Simple form	V-ing form
must I rebuff? must you rebuff? must he rebuff? must we rebuff? must you rebuff? must they rebuff?	must I be rebuffing? must you be rebuffing? must he be rebuffing? must we be rebuffing? must you be rebuffing? must they be rebuffing?
Perfect	V-ing perfect
must I have rebuffed? must you have rebuffed? must he have rebuffed? must we have rebuffed? must you have rebuffed? must they have rebuffed?	must I have been rebuffing? must you have been rebuffing? must he have been rebuffing? must we have been rebuffing? must you have been rebuffing? must they have been rebuffing?

Interro-negative form

Simple form	V-ing form
must I not rebuff? must you not rebuff? must he not rebuff? must we not rebuff? must you not rebuff? must they not rebuff?	must I not be rebuffing? must you not be rebuffing? must he not be rebuffing? must we not be rebuffing? must you not be rebuffing? must they not be rebuffing?
Perfect	V-ing perfect
must I not have rebuffed? must you not have rebuffed? must he not have rebuffed? must we not have rebuffed? must you not have rebuffed? must they not have rebuffed?	must I not have been rebuffing? must you not have been rebuffing? must he not have been rebuffing? must we not have been rebuffing? must you not have been rebuffing? must they not have been rebuffing?