I could attack you could attack he could attack we could attack you could attack they could attack
Forma con V-ing
I could be attacking you could be attacking he could be attacking we could be attacking you could be attacking they could be attacking
Perfecto
I could have attacked you could have attacked he could have attacked we could have attacked you could have attacked they could have attacked
Perfecto con V-ing
I could have been attacking you could have been attacking he could have been attacking we could have been attacking you could have been attacking they could have been attacking
Negación
Forma simple
I couldn't attack you couldn't attack he couldn't attack we couldn't attack you couldn't attack they couldn't attack
Forma con V-ing
I couldn't be attacking you couldn't be attacking he couldn't be attacking we couldn't be attacking you couldn't be attacking they couldn't be attacking
Perfecto
I couldn't have attacked you couldn't have attacked he couldn't have attacked we couldn't have attacked you couldn't have attacked they couldn't have attacked
Perfecto con V-ing
I couldn't have been attacking you couldn't have been attacking he couldn't have been attacking we couldn't have been attacking you couldn't have been attacking they couldn't have been attacking
Forma interrogativa
Forma simple
could I attack? could you attack? could he attack? could we attack? could you attack? could they attack?
Forma con V-ing
could I be attacking? could you be attacking? could he be attacking? could we be attacking? could you be attacking? could they be attacking?
Perfecto
could I have attacked? could you have attacked? could he have attacked? could we have attacked? could you have attacked? could they have attacked?
Perfecto con V-ing
could I have been attacking? could you have been attacking? could he have been attacking? could we have been attacking? could you have been attacking? could they have been attacking?
Forma interro-negativa
Forma simple
couldn't I attack? couldn't you attack? couldn't he attack? couldn't we attack? couldn't you attack? couldn't they attack?
Forma con V-ing
couldn't I be attacking? couldn't you be attacking? couldn't he be attacking? couldn't we be attacking? couldn't you be attacking? couldn't they be attacking?
Perfecto
couldn't I have attacked? couldn't you have attacked? couldn't he have attacked? couldn't we have attacked? couldn't you have attacked? couldn't they have attacked?
Perfecto con V-ing
couldn't I have been attacking? couldn't you have been attacking? couldn't he have been attacking? couldn't we have been attacking? couldn't you have been attacking? couldn't they have been attacking?