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