I can found you can found he can found we can found you can found they can found
Forma con V-ing
I can be founding you can be founding he can be founding we can be founding you can be founding they can be founding
Perfecto
I can have founded you can have founded he 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 he 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 he 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 he 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 he 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 he 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 he found? can we found? can you found? can they found?
Forma con V-ing
can I be founding? can you be founding? can he be founding? can we be founding? can you be founding? can they be founding?
Perfecto
can I have founded? can you have founded? can he 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 he 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 he 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 he 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 he 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 he have been founding? can't we have been founding? can't you have been founding? can't they have been founding?