should fester
Verbo regular: fester - festered- festered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should fester
you should fester
he should fester
we should fester
you should fester
they should fester 	I should be festering
you should be festering
he should be festering
we should be festering
you should be festering
they should be festering	I should have festered
you should have festered
he should have festered
we should have festered
you should have festered
they should have festered	I should have been festering
you should have been festering
he should have been festering
we should have been festering
you should have been festering
they should have been festering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not fester
you should not fester
he should not fester
we should not fester
you should not fester
they should not fester 	I should not be festering
you should not be festering
he should not be festering
we should not be festering
you should not be festering
they should not be festering	I should not have festered
you should not have festered
he should not have festered
we should not have festered
you should not have festered
they should not have festered	I should not have been festering
you should not have been festering
he should not have been festering
we should not have been festering
you should not have been festering
they should not have been festering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I fester?
should you fester?
should he fester?
should we fester?
should you fester?
should they fester? 	should I be festering?
should you be festering?
should he be festering?
should we be festering?
should you be festering?
should they be festering? 	should I have festered?
should you have festered?
should he have festered?
should we have festered?
should you have festered?
should they have festered? 	should I have been festering?
should you have been festering?
should he have been festering?
should we have been festering?
should you have been festering?
should they have been festering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not fester?
should you not fester?
should he not fester?
should we not fester?
should you not fester?
should they not fester? 	should I not be festering?
should you not be festering?
should he not be festering?
should we not be festering?
should you not be festering?
should they not be festering? 	should I not have festered?
should you not have festered?
should he not have festered?
should we not have festered?
should you not have festered?
should they not have festered? 	should I not have been festering?
should you not have been festering?
should he not have been festering?
should we not have been festering?
should you not have been festering?
should they not have been festering?