must register
Verbe régulier : register - registered- registered
Traduction française : (faire) enregistrer - s'inscrire 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must register
you must register
she must register
we must register
you must register
they must register 	I must be registering
you must be registering
she must be registering
we must be registering
you must be registering
they must be registering	I must have registered
you must have registered
she must have registered
we must have registered
you must have registered
they must have registered	I must have been registering
you must have been registering
she must have been registering
we must have been registering
you must have been registering
they must have been registering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't register
you mustn't register
she mustn't register
we mustn't register
you mustn't register
they mustn't register 	I mustn't be registering
you mustn't be registering
she mustn't be registering
we mustn't be registering
you mustn't be registering
they mustn't be registering	I mustn't have registered
you mustn't have registered
she mustn't have registered
we mustn't have registered
you mustn't have registered
they mustn't have registered	I mustn't have been registering
you mustn't have been registering
she mustn't have been registering
we mustn't have been registering
you mustn't have been registering
they mustn't have been registering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I register?
must you register?
must she register?
must we register?
must you register?
must they register? 	must I be registering?
must you be registering?
must she be registering?
must we be registering?
must you be registering?
must they be registering? 	must I have registered?
must you have registered?
must she have registered?
must we have registered?
must you have registered?
must they have registered? 	must I have been registering?
must you have been registering?
must she have been registering?
must we have been registering?
must you have been registering?
must they have been registering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I register?
mustn't you register?
mustn't she register?
mustn't we register?
mustn't you register?
mustn't they register? 	mustn't I be registering?
mustn't you be registering?
mustn't she be registering?
mustn't we be registering?
mustn't you be registering?
mustn't they be registering? 	mustn't I have registered?
mustn't you have registered?
mustn't she have registered?
mustn't we have registered?
mustn't you have registered?
mustn't they have registered? 	mustn't I have been registering?
mustn't you have been registering?
mustn't she have been registering?
mustn't we have been registering?
mustn't you have been registering?
mustn't they have been registering?