must fester
Verbe régulier : fester - festered- festered
Traduction française : suppurer (UK) buller 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must fester
you must fester
she must fester
we must fester
you must fester
they must fester 	I must be festering
you must be festering
she must be festering
we must be festering
you must be festering
they must be festering	I must have festered
you must have festered
she must have festered
we must have festered
you must have festered
they must have festered	I must have been festering
you must have been festering
she must have been festering
we must have been festering
you must have been festering
they must have been festering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't fester
you mustn't fester
she mustn't fester
we mustn't fester
you mustn't fester
they mustn't fester 	I mustn't be festering
you mustn't be festering
she mustn't be festering
we mustn't be festering
you mustn't be festering
they mustn't be festering	I mustn't have festered
you mustn't have festered
she mustn't have festered
we mustn't have festered
you mustn't have festered
they mustn't have festered	I mustn't have been festering
you mustn't have been festering
she mustn't have been festering
we mustn't have been festering
you mustn't have been festering
they mustn't have been festering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I fester?
must you fester?
must she fester?
must we fester?
must you fester?
must they fester? 	must I be festering?
must you be festering?
must she be festering?
must we be festering?
must you be festering?
must they be festering? 	must I have festered?
must you have festered?
must she have festered?
must we have festered?
must you have festered?
must they have festered? 	must I have been festering?
must you have been festering?
must she have been festering?
must we have been festering?
must you have been festering?
must they have been festering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I fester?
mustn't you fester?
mustn't she fester?
mustn't we fester?
mustn't you fester?
mustn't they fester? 	mustn't I be festering?
mustn't you be festering?
mustn't she be festering?
mustn't we be festering?
mustn't you be festering?
mustn't they be festering? 	mustn't I have festered?
mustn't you have festered?
mustn't she have festered?
mustn't we have festered?
mustn't you have festered?
mustn't they have festered? 	mustn't I have been festering?
mustn't you have been festering?
mustn't she have been festering?
mustn't we have been festering?
mustn't you have been festering?
mustn't they have been festering?