can counterfeit
Regular verb: counterfeit - counterfeited- counterfeited

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

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

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

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