must ret
Verbe régulier : ret - retted- retted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must ret
you must ret
he must ret
we must ret
you must ret
they must ret 	I must be retting
you must be retting
he must be retting
we must be retting
you must be retting
they must be retting	I must have retted
you must have retted
he must have retted
we must have retted
you must have retted
they must have retted	I must have been retting
you must have been retting
he must have been retting
we must have been retting
you must have been retting
they must have been retting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't ret
you mustn't ret
he mustn't ret
we mustn't ret
you mustn't ret
they mustn't ret 	I mustn't be retting
you mustn't be retting
he mustn't be retting
we mustn't be retting
you mustn't be retting
they mustn't be retting	I mustn't have retted
you mustn't have retted
he mustn't have retted
we mustn't have retted
you mustn't have retted
they mustn't have retted	I mustn't have been retting
you mustn't have been retting
he mustn't have been retting
we mustn't have been retting
you mustn't have been retting
they mustn't have been retting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I ret?
must you ret?
must he ret?
must we ret?
must you ret?
must they ret? 	must I be retting?
must you be retting?
must he be retting?
must we be retting?
must you be retting?
must they be retting? 	must I have retted?
must you have retted?
must he have retted?
must we have retted?
must you have retted?
must they have retted? 	must I have been retting?
must you have been retting?
must he have been retting?
must we have been retting?
must you have been retting?
must they have been retting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I ret?
mustn't you ret?
mustn't he ret?
mustn't we ret?
mustn't you ret?
mustn't they ret? 	mustn't I be retting?
mustn't you be retting?
mustn't he be retting?
mustn't we be retting?
mustn't you be retting?
mustn't they be retting? 	mustn't I have retted?
mustn't you have retted?
mustn't he have retted?
mustn't we have retted?
mustn't you have retted?
mustn't they have retted? 	mustn't I have been retting?
mustn't you have been retting?
mustn't he have been retting?
mustn't we have been retting?
mustn't you have been retting?
mustn't they have been retting?