I must scupper you must scupper she must scupper we must scupper you must scupper they must scupper
V-ing form
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
I must have scuppered you must have scuppered she must have scuppered we must have scuppered you must have scuppered they must have scuppered
V-ing perfect
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
I must not scupper you must not scupper she must not scupper we must not scupper you must not scupper they must not scupper
V-ing form
I must not be scuppering you must not be scuppering she must not be scuppering we must not be scuppering you must not be scuppering they must not be scuppering
Perfect
I must not have scuppered you must not have scuppered she must not have scuppered we must not have scuppered you must not have scuppered they must not have scuppered
V-ing perfect
I must not have been scuppering you must not have been scuppering she must not have been scuppering we must not have been scuppering you must not have been scuppering they must not have been scuppering
Interrogative form
Simple form
must I scupper? must you scupper? must she scupper? must we scupper? must you scupper? must they scupper?
V-ing form
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
must I have scuppered? must you have scuppered? must she have scuppered? must we have scuppered? must you have scuppered? must they have scuppered?
V-ing perfect
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
must I not scupper? must you not scupper? must she not scupper? must we not scupper? must you not scupper? must they not scupper?
V-ing form
must I not be scuppering? must you not be scuppering? must she not be scuppering? must we not be scuppering? must you not be scuppering? must they not be scuppering?
Perfect
must I not have scuppered? must you not have scuppered? must she not have scuppered? must we not have scuppered? must you not have scuppered? must they not have scuppered?
V-ing perfect
must I not have been scuppering? must you not have been scuppering? must she not have been scuppering? must we not have been scuppering? must you not have been scuppering? must they not have been scuppering?