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