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