may scumble
Regular verb: scumble - scumbled- scumbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may scumble
you may scumble
she may scumble
we may scumble
you may scumble
they may scumble 	I may be scumbling
you may be scumbling
she may be scumbling
we may be scumbling
you may be scumbling
they may be scumbling	I may have scumbled
you may have scumbled
she may have scumbled
we may have scumbled
you may have scumbled
they may have scumbled	I may have been scumbling
you may have been scumbling
she may have been scumbling
we may have been scumbling
you may have been scumbling
they may have been scumbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't scumble
you mayn't scumble
she mayn't scumble
we mayn't scumble
you mayn't scumble
they mayn't scumble 	I mayn't be scumbling
you mayn't be scumbling
she mayn't be scumbling
we mayn't be scumbling
you mayn't be scumbling
they mayn't be scumbling	I mayn't have scumbled
you mayn't have scumbled
she mayn't have scumbled
we mayn't have scumbled
you mayn't have scumbled
they mayn't have scumbled	I mayn't have been scumbling
you mayn't have been scumbling
she mayn't have been scumbling
we mayn't have been scumbling
you mayn't have been scumbling
they mayn't have been scumbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I scumble?
may you scumble?
may she scumble?
may we scumble?
may you scumble?
may they scumble? 	may I be scumbling?
may you be scumbling?
may she be scumbling?
may we be scumbling?
may you be scumbling?
may they be scumbling? 	may I have scumbled?
may you have scumbled?
may she have scumbled?
may we have scumbled?
may you have scumbled?
may they have scumbled? 	may I have been scumbling?
may you have been scumbling?
may she have been scumbling?
may we have been scumbling?
may you have been scumbling?
may they have been scumbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I scumble?
mayn't you scumble?
mayn't she scumble?
mayn't we scumble?
mayn't you scumble?
mayn't they scumble? 	mayn't I be scumbling?
mayn't you be scumbling?
mayn't she be scumbling?
mayn't we be scumbling?
mayn't you be scumbling?
mayn't they be scumbling? 	mayn't I have scumbled?
mayn't you have scumbled?
mayn't she have scumbled?
mayn't we have scumbled?
mayn't you have scumbled?
mayn't they have scumbled? 	mayn't I have been scumbling?
mayn't you have been scumbling?
mayn't she have been scumbling?
mayn't we have been scumbling?
mayn't you have been scumbling?
mayn't they have been scumbling?