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