may stub
Regular verb: stub - stubbed- stubbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may stub
you may stub
he may stub
we may stub
you may stub
they may stub 	I may be stubbing
you may be stubbing
he may be stubbing
we may be stubbing
you may be stubbing
they may be stubbing	I may have stubbed
you may have stubbed
he may have stubbed
we may have stubbed
you may have stubbed
they may have stubbed	I may have been stubbing
you may have been stubbing
he may have been stubbing
we may have been stubbing
you may have been stubbing
they may have been stubbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't stub
you mayn't stub
he mayn't stub
we mayn't stub
you mayn't stub
they mayn't stub 	I mayn't be stubbing
you mayn't be stubbing
he mayn't be stubbing
we mayn't be stubbing
you mayn't be stubbing
they mayn't be stubbing	I mayn't have stubbed
you mayn't have stubbed
he mayn't have stubbed
we mayn't have stubbed
you mayn't have stubbed
they mayn't have stubbed	I mayn't have been stubbing
you mayn't have been stubbing
he mayn't have been stubbing
we mayn't have been stubbing
you mayn't have been stubbing
they mayn't have been stubbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I stub?
may you stub?
may he stub?
may we stub?
may you stub?
may they stub? 	may I be stubbing?
may you be stubbing?
may he be stubbing?
may we be stubbing?
may you be stubbing?
may they be stubbing? 	may I have stubbed?
may you have stubbed?
may he have stubbed?
may we have stubbed?
may you have stubbed?
may they have stubbed? 	may I have been stubbing?
may you have been stubbing?
may he have been stubbing?
may we have been stubbing?
may you have been stubbing?
may they have been stubbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I stub?
mayn't you stub?
mayn't he stub?
mayn't we stub?
mayn't you stub?
mayn't they stub? 	mayn't I be stubbing?
mayn't you be stubbing?
mayn't he be stubbing?
mayn't we be stubbing?
mayn't you be stubbing?
mayn't they be stubbing? 	mayn't I have stubbed?
mayn't you have stubbed?
mayn't he have stubbed?
mayn't we have stubbed?
mayn't you have stubbed?
mayn't they have stubbed? 	mayn't I have been stubbing?
mayn't you have been stubbing?
mayn't he have been stubbing?
mayn't we have been stubbing?
mayn't you have been stubbing?
mayn't they have been stubbing?