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