I could fever you could fever he could fever we could fever you could fever they could fever
Forma con V-ing
I could be fevering you could be fevering he could be fevering we could be fevering you could be fevering they could be fevering
Perfecto
I could have fevered you could have fevered he could have fevered we could have fevered you could have fevered they could have fevered
Perfecto con V-ing
I could have been fevering you could have been fevering he could have been fevering we could have been fevering you could have been fevering they could have been fevering
Negación
Forma simple
I couldn't fever you couldn't fever he couldn't fever we couldn't fever you couldn't fever they couldn't fever
Forma con V-ing
I couldn't be fevering you couldn't be fevering he couldn't be fevering we couldn't be fevering you couldn't be fevering they couldn't be fevering
Perfecto
I couldn't have fevered you couldn't have fevered he couldn't have fevered we couldn't have fevered you couldn't have fevered they couldn't have fevered
Perfecto con V-ing
I couldn't have been fevering you couldn't have been fevering he couldn't have been fevering we couldn't have been fevering you couldn't have been fevering they couldn't have been fevering
Forma interrogativa
Forma simple
could I fever? could you fever? could he fever? could we fever? could you fever? could they fever?
Forma con V-ing
could I be fevering? could you be fevering? could he be fevering? could we be fevering? could you be fevering? could they be fevering?
Perfecto
could I have fevered? could you have fevered? could he have fevered? could we have fevered? could you have fevered? could they have fevered?
Perfecto con V-ing
could I have been fevering? could you have been fevering? could he have been fevering? could we have been fevering? could you have been fevering? could they have been fevering?
Forma interro-negativa
Forma simple
couldn't I fever? couldn't you fever? couldn't he fever? couldn't we fever? couldn't you fever? couldn't they fever?
Forma con V-ing
couldn't I be fevering? couldn't you be fevering? couldn't he be fevering? couldn't we be fevering? couldn't you be fevering? couldn't they be fevering?
Perfecto
couldn't I have fevered? couldn't you have fevered? couldn't he have fevered? couldn't we have fevered? couldn't you have fevered? couldn't they have fevered?
Perfecto con V-ing
couldn't I have been fevering? couldn't you have been fevering? couldn't he have been fevering? couldn't we have been fevering? couldn't you have been fevering? couldn't they have been fevering?