English verb conjugation
MUST SCUPPER

Regular verb: scupper - scuppered - scuppered

Affirmation

Simple form	V-ing form
I must scupper you must scupper she must scupper we must scupper you must scupper they must scupper	I must be scuppering you must be scuppering she 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 she 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 she 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 she 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 she 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 she 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 she 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 she scupper? must we scupper? must you scupper? must they scupper?	must I be scuppering? must you be scuppering? must she 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 she 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 she 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 she 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 she 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 she 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 she have been scuppering? mustn't we have been scuppering? mustn't you have been scuppering? mustn't they have been scuppering?