I could ache you could ache she could ache we could ache you could ache they could ache
Forma con V-ing
I could be aching you could be aching she could be aching we could be aching you could be aching they could be aching
Perfecto
I could have ached you could have ached she could have ached we could have ached you could have ached they could have ached
Perfecto con V-ing
I could have been aching you could have been aching she could have been aching we could have been aching you could have been aching they could have been aching
Negación
Forma simple
I could not ache you could not ache she could not ache we could not ache you could not ache they could not ache
Forma con V-ing
I could not be aching you could not be aching she could not be aching we could not be aching you could not be aching they could not be aching
Perfecto
I could not have ached you could not have ached she could not have ached we could not have ached you could not have ached they could not have ached
Perfecto con V-ing
I could not have been aching you could not have been aching she could not have been aching we could not have been aching you could not have been aching they could not have been aching
Forma interrogativa
Forma simple
could I ache? could you ache? could she ache? could we ache? could you ache? could they ache?
Forma con V-ing
could I be aching? could you be aching? could she be aching? could we be aching? could you be aching? could they be aching?
Perfecto
could I have ached? could you have ached? could she have ached? could we have ached? could you have ached? could they have ached?
Perfecto con V-ing
could I have been aching? could you have been aching? could she have been aching? could we have been aching? could you have been aching? could they have been aching?
Forma interro-negativa
Forma simple
could I not ache? could you not ache? could she not ache? could we not ache? could you not ache? could they not ache?
Forma con V-ing
could I not be aching? could you not be aching? could she not be aching? could we not be aching? could you not be aching? could they not be aching?
Perfecto
could I not have ached? could you not have ached? could she not have ached? could we not have ached? could you not have ached? could they not have ached?
Perfecto con V-ing
could I not have been aching? could you not have been aching? could she not have been aching? could we not have been aching? could you not have been aching? could they not have been aching?