I can attach you can attach he can attach we can attach you can attach they can attach
Forma con V-ing
I can be attaching you can be attaching he can be attaching we can be attaching you can be attaching they can be attaching
Perfecto
I can have attached you can have attached he can have attached we can have attached you can have attached they can have attached
Perfecto con V-ing
I can have been attaching you can have been attaching he can have been attaching we can have been attaching you can have been attaching they can have been attaching
Negación
Forma simple
I can't attach you can't attach he can't attach we can't attach you can't attach they can't attach
Forma con V-ing
I can't be attaching you can't be attaching he can't be attaching we can't be attaching you can't be attaching they can't be attaching
Perfecto
I can't have attached you can't have attached he can't have attached we can't have attached you can't have attached they can't have attached
Perfecto con V-ing
I can't have been attaching you can't have been attaching he can't have been attaching we can't have been attaching you can't have been attaching they can't have been attaching
Forma interrogativa
Forma simple
can I attach? can you attach? can he attach? can we attach? can you attach? can they attach?
Forma con V-ing
can I be attaching? can you be attaching? can he be attaching? can we be attaching? can you be attaching? can they be attaching?
Perfecto
can I have attached? can you have attached? can he have attached? can we have attached? can you have attached? can they have attached?
Perfecto con V-ing
can I have been attaching? can you have been attaching? can he have been attaching? can we have been attaching? can you have been attaching? can they have been attaching?
Forma interro-negativa
Forma simple
can't I attach? can't you attach? can't he attach? can't we attach? can't you attach? can't they attach?
Forma con V-ing
can't I be attaching? can't you be attaching? can't he be attaching? can't we be attaching? can't you be attaching? can't they be attaching?
Perfecto
can't I have attached? can't you have attached? can't he have attached? can't we have attached? can't you have attached? can't they have attached?
Perfecto con V-ing
can't I have been attaching? can't you have been attaching? can't he have been attaching? can't we have been attaching? can't you have been attaching? can't they have been attaching?