may counterfeit
Regular verb: counterfeit - counterfeited- counterfeited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may counterfeit
you may counterfeit
he may counterfeit
we may counterfeit
you may counterfeit
they may counterfeit 	I may be counterfeiting
you may be counterfeiting
he may be counterfeiting
we may be counterfeiting
you may be counterfeiting
they may be counterfeiting	I may have counterfeited
you may have counterfeited
he may have counterfeited
we may have counterfeited
you may have counterfeited
they may have counterfeited	I may have been counterfeiting
you may have been counterfeiting
he may have been counterfeiting
we may have been counterfeiting
you may have been counterfeiting
they may have been counterfeiting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't counterfeit
you mayn't counterfeit
he mayn't counterfeit
we mayn't counterfeit
you mayn't counterfeit
they mayn't counterfeit 	I mayn't be counterfeiting
you mayn't be counterfeiting
he mayn't be counterfeiting
we mayn't be counterfeiting
you mayn't be counterfeiting
they mayn't be counterfeiting	I mayn't have counterfeited
you mayn't have counterfeited
he mayn't have counterfeited
we mayn't have counterfeited
you mayn't have counterfeited
they mayn't have counterfeited	I mayn't have been counterfeiting
you mayn't have been counterfeiting
he mayn't have been counterfeiting
we mayn't have been counterfeiting
you mayn't have been counterfeiting
they mayn't have been counterfeiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I counterfeit?
may you counterfeit?
may he counterfeit?
may we counterfeit?
may you counterfeit?
may they counterfeit? 	may I be counterfeiting?
may you be counterfeiting?
may he be counterfeiting?
may we be counterfeiting?
may you be counterfeiting?
may they be counterfeiting? 	may I have counterfeited?
may you have counterfeited?
may he have counterfeited?
may we have counterfeited?
may you have counterfeited?
may they have counterfeited? 	may I have been counterfeiting?
may you have been counterfeiting?
may he have been counterfeiting?
may we have been counterfeiting?
may you have been counterfeiting?
may they have been counterfeiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I counterfeit?
mayn't you counterfeit?
mayn't he counterfeit?
mayn't we counterfeit?
mayn't you counterfeit?
mayn't they counterfeit? 	mayn't I be counterfeiting?
mayn't you be counterfeiting?
mayn't he be counterfeiting?
mayn't we be counterfeiting?
mayn't you be counterfeiting?
mayn't they be counterfeiting? 	mayn't I have counterfeited?
mayn't you have counterfeited?
mayn't he have counterfeited?
mayn't we have counterfeited?
mayn't you have counterfeited?
mayn't they have counterfeited? 	mayn't I have been counterfeiting?
mayn't you have been counterfeiting?
mayn't he have been counterfeiting?
mayn't we have been counterfeiting?
mayn't you have been counterfeiting?
mayn't they have been counterfeiting?