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