Conjugación del verbo inglés
COULD FESTER

Verbo regular: fester - festered - festered

Afirmación

Forma simple	Forma con V-ing
I could fester you could fester she could fester we could fester you could fester they could fester	I could be festering you could be festering she could be festering we could be festering you could be festering they could be festering
Perfecto	Perfecto con V-ing
I could have festered you could have festered she could have festered we could have festered you could have festered they could have festered	I could have been festering you could have been festering she could have been festering we could have been festering you could have been festering they could have been festering

Negación

Forma simple	Forma con V-ing
I could not fester you could not fester she could not fester we could not fester you could not fester they could not fester	I could not be festering you could not be festering she could not be festering we could not be festering you could not be festering they could not be festering
Perfecto	Perfecto con V-ing
I could not have festered you could not have festered she could not have festered we could not have festered you could not have festered they could not have festered	I could not have been festering you could not have been festering she could not have been festering we could not have been festering you could not have been festering they could not have been festering

Forma interrogativa

Forma simple	Forma con V-ing
could I fester? could you fester? could she fester? could we fester? could you fester? could they fester?	could I be festering? could you be festering? could she be festering? could we be festering? could you be festering? could they be festering?
Perfecto	Perfecto con V-ing
could I have festered? could you have festered? could she have festered? could we have festered? could you have festered? could they have festered?	could I have been festering? could you have been festering? could she have been festering? could we have been festering? could you have been festering? could they have been festering?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not fester? could you not fester? could she not fester? could we not fester? could you not fester? could they not fester?	could I not be festering? could you not be festering? could she not be festering? could we not be festering? could you not be festering? could they not be festering?
Perfecto	Perfecto con V-ing
could I not have festered? could you not have festered? could she not have festered? could we not have festered? could you not have festered? could they not have festered?	could I not have been festering? could you not have been festering? could she not have been festering? could we not have been festering? could you not have been festering? could they not have been festering?