must better
Verbe régulier : better - bettered- bettered
Traduction française : améliorer - dépasser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must better
you must better
she must better
we must better
you must better
they must better 	I must be bettering
you must be bettering
she must be bettering
we must be bettering
you must be bettering
they must be bettering	I must have bettered
you must have bettered
she must have bettered
we must have bettered
you must have bettered
they must have bettered	I must have been bettering
you must have been bettering
she must have been bettering
we must have been bettering
you must have been bettering
they must have been bettering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't better
you mustn't better
she mustn't better
we mustn't better
you mustn't better
they mustn't better 	I mustn't be bettering
you mustn't be bettering
she mustn't be bettering
we mustn't be bettering
you mustn't be bettering
they mustn't be bettering	I mustn't have bettered
you mustn't have bettered
she mustn't have bettered
we mustn't have bettered
you mustn't have bettered
they mustn't have bettered	I mustn't have been bettering
you mustn't have been bettering
she mustn't have been bettering
we mustn't have been bettering
you mustn't have been bettering
they mustn't have been bettering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I better?
must you better?
must she better?
must we better?
must you better?
must they better? 	must I be bettering?
must you be bettering?
must she be bettering?
must we be bettering?
must you be bettering?
must they be bettering? 	must I have bettered?
must you have bettered?
must she have bettered?
must we have bettered?
must you have bettered?
must they have bettered? 	must I have been bettering?
must you have been bettering?
must she have been bettering?
must we have been bettering?
must you have been bettering?
must they have been bettering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I better?
mustn't you better?
mustn't she better?
mustn't we better?
mustn't you better?
mustn't they better? 	mustn't I be bettering?
mustn't you be bettering?
mustn't she be bettering?
mustn't we be bettering?
mustn't you be bettering?
mustn't they be bettering? 	mustn't I have bettered?
mustn't you have bettered?
mustn't she have bettered?
mustn't we have bettered?
mustn't you have bettered?
mustn't they have bettered? 	mustn't I have been bettering?
mustn't you have been bettering?
mustn't she have been bettering?
mustn't we have been bettering?
mustn't you have been bettering?
mustn't they have been bettering?