I could list you could list he could list we could list you could list they could list
Forma com V-ing
I could be listing you could be listing he could be listing we could be listing you could be listing they could be listing
Perfeito
I could have listed you could have listed he could have listed we could have listed you could have listed they could have listed
Perfeito com V-ing
I could have been listing you could have been listing he could have been listing we could have been listing you could have been listing they could have been listing
Negação
Forma simple
I couldn't list you couldn't list he couldn't list we couldn't list you couldn't list they couldn't list
Forma com V-ing
I couldn't be listing you couldn't be listing he couldn't be listing we couldn't be listing you couldn't be listing they couldn't be listing
Perfeito
I couldn't have listed you couldn't have listed he couldn't have listed we couldn't have listed you couldn't have listed they couldn't have listed
Perfeito com V-ing
I couldn't have been listing you couldn't have been listing he 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 he list? could we list? could you list? could they list?
Forma com V-ing
could I be listing? could you be listing? could he be listing? could we be listing? could you be listing? could they be listing?
Perfeito
could I have listed? could you have listed? could he have listed? could we have listed? could you have listed? could they have listed?
Perfeito com V-ing
could I have been listing? could you have been listing? could he have been listing? could we have been listing? could you have been listing? could they have been listing?
Forma interro-Negação
Forma simple
couldn't I list? couldn't you list? couldn't he list? couldn't we list? couldn't you list? couldn't they list?
Forma com V-ing
couldn't I be listing? couldn't you be listing? couldn't he be listing? couldn't we be listing? couldn't you be listing? couldn't they be listing?
Perfeito
couldn't I have listed? couldn't you have listed? couldn't he have listed? couldn't we have listed? couldn't you have listed? couldn't they have listed?
Perfeito com V-ing
couldn't I have been listing? couldn't you have been listing? couldn't he have been listing? couldn't we have been listing? couldn't you have been listing? couldn't they have been listing?