may scab
Regular verb: scab - scabbed- scabbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may scab
you may scab
she may scab
we may scab
you may scab
they may scab 	I may be scabbing
you may be scabbing
she may be scabbing
we may be scabbing
you may be scabbing
they may be scabbing	I may have scabbed
you may have scabbed
she may have scabbed
we may have scabbed
you may have scabbed
they may have scabbed	I may have been scabbing
you may have been scabbing
she may have been scabbing
we may have been scabbing
you may have been scabbing
they may have been scabbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't scab
you mayn't scab
she mayn't scab
we mayn't scab
you mayn't scab
they mayn't scab 	I mayn't be scabbing
you mayn't be scabbing
she mayn't be scabbing
we mayn't be scabbing
you mayn't be scabbing
they mayn't be scabbing	I mayn't have scabbed
you mayn't have scabbed
she mayn't have scabbed
we mayn't have scabbed
you mayn't have scabbed
they mayn't have scabbed	I mayn't have been scabbing
you mayn't have been scabbing
she mayn't have been scabbing
we mayn't have been scabbing
you mayn't have been scabbing
they mayn't have been scabbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I scab?
may you scab?
may she scab?
may we scab?
may you scab?
may they scab? 	may I be scabbing?
may you be scabbing?
may she be scabbing?
may we be scabbing?
may you be scabbing?
may they be scabbing? 	may I have scabbed?
may you have scabbed?
may she have scabbed?
may we have scabbed?
may you have scabbed?
may they have scabbed? 	may I have been scabbing?
may you have been scabbing?
may she have been scabbing?
may we have been scabbing?
may you have been scabbing?
may they have been scabbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I scab?
mayn't you scab?
mayn't she scab?
mayn't we scab?
mayn't you scab?
mayn't they scab? 	mayn't I be scabbing?
mayn't you be scabbing?
mayn't she be scabbing?
mayn't we be scabbing?
mayn't you be scabbing?
mayn't they be scabbing? 	mayn't I have scabbed?
mayn't you have scabbed?
mayn't she have scabbed?
mayn't we have scabbed?
mayn't you have scabbed?
mayn't they have scabbed? 	mayn't I have been scabbing?
mayn't you have been scabbing?
mayn't she have been scabbing?
mayn't we have been scabbing?
mayn't you have been scabbing?
mayn't they have been scabbing?