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