English verb conjugation
MUST COUNTERFEIT

Regular verb: counterfeit - counterfeited - counterfeited

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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