must fester
Verbo regolare: fester - festered- festered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con 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	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not fester
you must not fester
she must not fester
we must not fester
you must not fester
they must not fester 	I must not be festering
you must not be festering
she must not be festering
we must not be festering
you must not be festering
they must not be festering	I must not have festered
you must not have festered
she must not have festered
we must not have festered
you must not have festered
they must not have festered	I must not have been festering
you must not have been festering
she must not have been festering
we must not have been festering
you must not have been festering
they must not have been festering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con 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? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not fester?
must you not fester?
must she not fester?
must we not fester?
must you not fester?
must they not fester? 	must I not be festering?
must you not be festering?
must she not be festering?
must we not be festering?
must you not be festering?
must they not be festering? 	must I not have festered?
must you not have festered?
must she not have festered?
must we not have festered?
must you not have festered?
must they not have festered? 	must I not have been festering?
must you not have been festering?
must she not have been festering?
must we not have been festering?
must you not have been festering?
must they not have been festering?