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