English verb conjugation
MUST SCUPPER

Regular verb: scupper - scuppered - scuppered

Affirmation

Simple form	V-ing form
I must scupper you must scupper he must scupper we must scupper you must scupper they must scupper	I must be scuppering you must be scuppering he must be scuppering we must be scuppering you must be scuppering they must be scuppering
Perfect	V-ing perfect
I must have scuppered you must have scuppered he must have scuppered we must have scuppered you must have scuppered they must have scuppered	I must have been scuppering you must have been scuppering he must have been scuppering we must have been scuppering you must have been scuppering they must have been scuppering

Negation

Simple form	V-ing form
I mustn't scupper you mustn't scupper he mustn't scupper we mustn't scupper you mustn't scupper they mustn't scupper	I mustn't be scuppering you mustn't be scuppering he mustn't be scuppering we mustn't be scuppering you mustn't be scuppering they mustn't be scuppering
Perfect	V-ing perfect
I mustn't have scuppered you mustn't have scuppered he mustn't have scuppered we mustn't have scuppered you mustn't have scuppered they mustn't have scuppered	I mustn't have been scuppering you mustn't have been scuppering he mustn't have been scuppering we mustn't have been scuppering you mustn't have been scuppering they mustn't have been scuppering

Interrogative form

Simple form	V-ing form
must I scupper? must you scupper? must he scupper? must we scupper? must you scupper? must they scupper?	must I be scuppering? must you be scuppering? must he be scuppering? must we be scuppering? must you be scuppering? must they be scuppering?
Perfect	V-ing perfect
must I have scuppered? must you have scuppered? must he have scuppered? must we have scuppered? must you have scuppered? must they have scuppered?	must I have been scuppering? must you have been scuppering? must he have been scuppering? must we have been scuppering? must you have been scuppering? must they have been scuppering?

Interro-negative form

Simple form	V-ing form
mustn't I scupper? mustn't you scupper? mustn't he scupper? mustn't we scupper? mustn't you scupper? mustn't they scupper?	mustn't I be scuppering? mustn't you be scuppering? mustn't he be scuppering? mustn't we be scuppering? mustn't you be scuppering? mustn't they be scuppering?
Perfect	V-ing perfect
mustn't I have scuppered? mustn't you have scuppered? mustn't he have scuppered? mustn't we have scuppered? mustn't you have scuppered? mustn't they have scuppered?	mustn't I have been scuppering? mustn't you have been scuppering? mustn't he have been scuppering? mustn't we have been scuppering? mustn't you have been scuppering? mustn't they have been scuppering?