I could list you could list she could list we could list you could list they could list
Forma con V-ing
I could be listing you could be listing she could be listing we could be listing you could be listing they could be listing
Perfecto
I could have listed you could have listed she could have listed we could have listed you could have listed they could have listed
Perfecto con V-ing
I could have been listing you could have been listing she could have been listing we could have been listing you could have been listing they could have been listing
Negación
Forma simple
I couldn't list you couldn't list she couldn't list we couldn't list you couldn't list they couldn't list
Forma con V-ing
I couldn't be listing you couldn't be listing she couldn't be listing we couldn't be listing you couldn't be listing they couldn't be listing
Perfecto
I couldn't have listed you couldn't have listed she couldn't have listed we couldn't have listed you couldn't have listed they couldn't have listed
Perfecto con V-ing
I couldn't have been listing you couldn't have been listing she couldn't have been listing we couldn't have been listing you couldn't have been listing they couldn't have been listing
Forma interrogativa
Forma simple
could I list? could you list? could she list? could we list? could you list? could they list?
Forma con V-ing
could I be listing? could you be listing? could she be listing? could we be listing? could you be listing? could they be listing?
Perfecto
could I have listed? could you have listed? could she have listed? could we have listed? could you have listed? could they have listed?
Perfecto con V-ing
could I have been listing? could you have been listing? could she have been listing? could we have been listing? could you have been listing? could they have been listing?
Forma interro-negativa
Forma simple
couldn't I list? couldn't you list? couldn't she list? couldn't we list? couldn't you list? couldn't they list?
Forma con V-ing
couldn't I be listing? couldn't you be listing? couldn't she be listing? couldn't we be listing? couldn't you be listing? couldn't they be listing?
Perfecto
couldn't I have listed? couldn't you have listed? couldn't she have listed? couldn't we have listed? couldn't you have listed? couldn't they have listed?
Perfecto con V-ing
couldn't I have been listing? couldn't you have been listing? couldn't she have been listing? couldn't we have been listing? couldn't you have been listing? couldn't they have been listing?