I could fly you could fly she could fly we could fly you could fly they could fly
Forma con V-ing
I could be flying you could be flying she could be flying we could be flying you could be flying they could be flying
Perfecto
I could have flown you could have flown she could have flown we could have flown you could have flown they could have flown
Perfecto con V-ing
I could have been flying you could have been flying she could have been flying we could have been flying you could have been flying they could have been flying
Negación
Forma simple
I could not fly you could not fly she could not fly we could not fly you could not fly they could not fly
Forma con V-ing
I could not be flying you could not be flying she could not be flying we could not be flying you could not be flying they could not be flying
Perfecto
I could not have flown you could not have flown she could not have flown we could not have flown you could not have flown they could not have flown
Perfecto con V-ing
I could not have been flying you could not have been flying she could not have been flying we could not have been flying you could not have been flying they could not have been flying
Forma interrogativa
Forma simple
could I fly? could you fly? could she fly? could we fly? could you fly? could they fly?
Forma con V-ing
could I be flying? could you be flying? could she be flying? could we be flying? could you be flying? could they be flying?
Perfecto
could I have flown? could you have flown? could she have flown? could we have flown? could you have flown? could they have flown?
Perfecto con V-ing
could I have been flying? could you have been flying? could she have been flying? could we have been flying? could you have been flying? could they have been flying?
Forma interro-negativa
Forma simple
could I not fly? could you not fly? could she not fly? could we not fly? could you not fly? could they not fly?
Forma con V-ing
could I not be flying? could you not be flying? could she not be flying? could we not be flying? could you not be flying? could they not be flying?
Perfecto
could I not have flown? could you not have flown? could she not have flown? could we not have flown? could you not have flown? could they not have flown?
Perfecto con V-ing
could I not have been flying? could you not have been flying? could she not have been flying? could we not have been flying? could you not have been flying? could they not have been flying?