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