can counterfeit
Regular verb: counterfeit - counterfeited- counterfeited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can counterfeit
you can counterfeit
she can counterfeit
we can counterfeit
you can counterfeit
they can counterfeit 	I can be counterfeiting
you can be counterfeiting
she can be counterfeiting
we can be counterfeiting
you can be counterfeiting
they can be counterfeiting	I can have counterfeited
you can have counterfeited
she 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
she 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 cannot counterfeit
you cannot counterfeit
she cannot counterfeit
we cannot counterfeit
you cannot counterfeit
they cannot counterfeit 	I cannot be counterfeiting
you cannot be counterfeiting
she cannot be counterfeiting
we cannot be counterfeiting
you cannot be counterfeiting
they cannot be counterfeiting	I cannot have counterfeited
you cannot have counterfeited
she cannot have counterfeited
we cannot have counterfeited
you cannot have counterfeited
they cannot have counterfeited	I cannot have been counterfeiting
you cannot have been counterfeiting
she cannot have been counterfeiting
we cannot have been counterfeiting
you cannot have been counterfeiting
they cannot have been counterfeiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I counterfeit?
can you counterfeit?
can she counterfeit?
can we counterfeit?
can you counterfeit?
can they counterfeit? 	can I be counterfeiting?
can you be counterfeiting?
can she be counterfeiting?
can we be counterfeiting?
can you be counterfeiting?
can they be counterfeiting? 	can I have counterfeited?
can you have counterfeited?
can she 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 she 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 I not counterfeit?
can you not counterfeit?
can she not counterfeit?
can we not counterfeit?
can you not counterfeit?
can they not counterfeit? 	can I not be counterfeiting?
can you not be counterfeiting?
can she not be counterfeiting?
can we not be counterfeiting?
can you not be counterfeiting?
can they not be counterfeiting? 	can I not have counterfeited?
can you not have counterfeited?
can she not have counterfeited?
can we not have counterfeited?
can you not have counterfeited?
can they not have counterfeited? 	can I not have been counterfeiting?
can you not have been counterfeiting?
can she not have been counterfeiting?
can we not have been counterfeiting?
can you not have been counterfeiting?
can they not have been counterfeiting?