must frit
Verbe régulier : frit - frited- frited

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must frit
you must frit
he must frit
we must frit
you must frit
they must frit 	I must be friting
you must be friting
he must be friting
we must be friting
you must be friting
they must be friting	I must have frited
you must have frited
he must have frited
we must have frited
you must have frited
they must have frited	I must have been friting
you must have been friting
he must have been friting
we must have been friting
you must have been friting
they must have been friting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't frit
you mustn't frit
he mustn't frit
we mustn't frit
you mustn't frit
they mustn't frit 	I mustn't be friting
you mustn't be friting
he mustn't be friting
we mustn't be friting
you mustn't be friting
they mustn't be friting	I mustn't have frited
you mustn't have frited
he mustn't have frited
we mustn't have frited
you mustn't have frited
they mustn't have frited	I mustn't have been friting
you mustn't have been friting
he mustn't have been friting
we mustn't have been friting
you mustn't have been friting
they mustn't have been friting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I frit?
must you frit?
must he frit?
must we frit?
must you frit?
must they frit? 	must I be friting?
must you be friting?
must he be friting?
must we be friting?
must you be friting?
must they be friting? 	must I have frited?
must you have frited?
must he have frited?
must we have frited?
must you have frited?
must they have frited? 	must I have been friting?
must you have been friting?
must he have been friting?
must we have been friting?
must you have been friting?
must they have been friting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I frit?
mustn't you frit?
mustn't he frit?
mustn't we frit?
mustn't you frit?
mustn't they frit? 	mustn't I be friting?
mustn't you be friting?
mustn't he be friting?
mustn't we be friting?
mustn't you be friting?
mustn't they be friting? 	mustn't I have frited?
mustn't you have frited?
mustn't he have frited?
mustn't we have frited?
mustn't you have frited?
mustn't they have frited? 	mustn't I have been friting?
mustn't you have been friting?
mustn't he have been friting?
mustn't we have been friting?
mustn't you have been friting?
mustn't they have been friting?