I can found you can found she can found we can found you can found they can found
Forma con V-ing
I can be founding you can be founding she can be founding we can be founding you can be founding they can be founding
Perfecto
I can have founded you can have founded she can have founded we can have founded you can have founded they can have founded
Perfecto con V-ing
I can have been founding you can have been founding she can have been founding we can have been founding you can have been founding they can have been founding
Negación
Forma simple
I can't found you can't found she can't found we can't found you can't found they can't found
Forma con V-ing
I can't be founding you can't be founding she can't be founding we can't be founding you can't be founding they can't be founding
Perfecto
I can't have founded you can't have founded she can't have founded we can't have founded you can't have founded they can't have founded
Perfecto con V-ing
I can't have been founding you can't have been founding she can't have been founding we can't have been founding you can't have been founding they can't have been founding
Forma interrogativa
Forma simple
can I found? can you found? can she found? can we found? can you found? can they found?
Forma con V-ing
can I be founding? can you be founding? can she be founding? can we be founding? can you be founding? can they be founding?
Perfecto
can I have founded? can you have founded? can she have founded? can we have founded? can you have founded? can they have founded?
Perfecto con V-ing
can I have been founding? can you have been founding? can she have been founding? can we have been founding? can you have been founding? can they have been founding?
Forma interro-negativa
Forma simple
can't I found? can't you found? can't she found? can't we found? can't you found? can't they found?
Forma con V-ing
can't I be founding? can't you be founding? can't she be founding? can't we be founding? can't you be founding? can't they be founding?
Perfecto
can't I have founded? can't you have founded? can't she have founded? can't we have founded? can't you have founded? can't they have founded?
Perfecto con V-ing
can't I have been founding? can't you have been founding? can't she have been founding? can't we have been founding? can't you have been founding? can't they have been founding?