must preregister
Verbe régulier : preregister - preregistered- preregistered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must preregister
you must preregister
he must preregister
we must preregister
you must preregister
they must preregister 	I must be preregistering
you must be preregistering
he must be preregistering
we must be preregistering
you must be preregistering
they must be preregistering	I must have preregistered
you must have preregistered
he must have preregistered
we must have preregistered
you must have preregistered
they must have preregistered	I must have been preregistering
you must have been preregistering
he must have been preregistering
we must have been preregistering
you must have been preregistering
they must have been preregistering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't preregister
you mustn't preregister
he mustn't preregister
we mustn't preregister
you mustn't preregister
they mustn't preregister 	I mustn't be preregistering
you mustn't be preregistering
he mustn't be preregistering
we mustn't be preregistering
you mustn't be preregistering
they mustn't be preregistering	I mustn't have preregistered
you mustn't have preregistered
he mustn't have preregistered
we mustn't have preregistered
you mustn't have preregistered
they mustn't have preregistered	I mustn't have been preregistering
you mustn't have been preregistering
he mustn't have been preregistering
we mustn't have been preregistering
you mustn't have been preregistering
they mustn't have been preregistering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I preregister?
must you preregister?
must he preregister?
must we preregister?
must you preregister?
must they preregister? 	must I be preregistering?
must you be preregistering?
must he be preregistering?
must we be preregistering?
must you be preregistering?
must they be preregistering? 	must I have preregistered?
must you have preregistered?
must he have preregistered?
must we have preregistered?
must you have preregistered?
must they have preregistered? 	must I have been preregistering?
must you have been preregistering?
must he have been preregistering?
must we have been preregistering?
must you have been preregistering?
must they have been preregistering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I preregister?
mustn't you preregister?
mustn't he preregister?
mustn't we preregister?
mustn't you preregister?
mustn't they preregister? 	mustn't I be preregistering?
mustn't you be preregistering?
mustn't he be preregistering?
mustn't we be preregistering?
mustn't you be preregistering?
mustn't they be preregistering? 	mustn't I have preregistered?
mustn't you have preregistered?
mustn't he have preregistered?
mustn't we have preregistered?
mustn't you have preregistered?
mustn't they have preregistered? 	mustn't I have been preregistering?
mustn't you have been preregistering?
mustn't he have been preregistering?
mustn't we have been preregistering?
mustn't you have been preregistering?
mustn't they have been preregistering?