I may scupper you may scupper he may scupper we may scupper you may scupper they may scupper
V-ing form
I may be scuppering you may be scuppering he may be scuppering we may be scuppering you may be scuppering they may be scuppering
Perfect
I may have scuppered you may have scuppered he may have scuppered we may have scuppered you may have scuppered they may have scuppered
V-ing perfect
I may have been scuppering you may have been scuppering he may have been scuppering we may have been scuppering you may have been scuppering they may have been scuppering
Negation
Simple form
I mayn't scupper you mayn't scupper he mayn't scupper we mayn't scupper you mayn't scupper they mayn't scupper
V-ing form
I mayn't be scuppering you mayn't be scuppering he mayn't be scuppering we mayn't be scuppering you mayn't be scuppering they mayn't be scuppering
Perfect
I mayn't have scuppered you mayn't have scuppered he mayn't have scuppered we mayn't have scuppered you mayn't have scuppered they mayn't have scuppered
V-ing perfect
I mayn't have been scuppering you mayn't have been scuppering he mayn't have been scuppering we mayn't have been scuppering you mayn't have been scuppering they mayn't have been scuppering
Interrogative form
Simple form
may I scupper? may you scupper? may he scupper? may we scupper? may you scupper? may they scupper?
V-ing form
may I be scuppering? may you be scuppering? may he be scuppering? may we be scuppering? may you be scuppering? may they be scuppering?
Perfect
may I have scuppered? may you have scuppered? may he have scuppered? may we have scuppered? may you have scuppered? may they have scuppered?
V-ing perfect
may I have been scuppering? may you have been scuppering? may he have been scuppering? may we have been scuppering? may you have been scuppering? may they have been scuppering?
Interro-negative form
Simple form
mayn't I scupper? mayn't you scupper? mayn't he scupper? mayn't we scupper? mayn't you scupper? mayn't they scupper?
V-ing form
mayn't I be scuppering? mayn't you be scuppering? mayn't he be scuppering? mayn't we be scuppering? mayn't you be scuppering? mayn't they be scuppering?
Perfect
mayn't I have scuppered? mayn't you have scuppered? mayn't he have scuppered? mayn't we have scuppered? mayn't you have scuppered? mayn't they have scuppered?
V-ing perfect
mayn't I have been scuppering? mayn't you have been scuppering? mayn't he have been scuppering? mayn't we have been scuppering? mayn't you have been scuppering? mayn't they have been scuppering?