may scupper
Regular verb: scupper - scuppered- scuppered

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