I can watch you can watch he can watch we can watch you can watch they can watch
Forma con V-ing
I can be watching you can be watching he can be watching we can be watching you can be watching they can be watching
Perfecto
I can have watched you can have watched he can have watched we can have watched you can have watched they can have watched
Perfecto con V-ing
I can have been watching you can have been watching he can have been watching we can have been watching you can have been watching they can have been watching
Negación
Forma simple
I can't watch you can't watch he can't watch we can't watch you can't watch they can't watch
Forma con V-ing
I can't be watching you can't be watching he can't be watching we can't be watching you can't be watching they can't be watching
Perfecto
I can't have watched you can't have watched he can't have watched we can't have watched you can't have watched they can't have watched
Perfecto con V-ing
I can't have been watching you can't have been watching he can't have been watching we can't have been watching you can't have been watching they can't have been watching
Forma interrogativa
Forma simple
can I watch? can you watch? can he watch? can we watch? can you watch? can they watch?
Forma con V-ing
can I be watching? can you be watching? can he be watching? can we be watching? can you be watching? can they be watching?
Perfecto
can I have watched? can you have watched? can he have watched? can we have watched? can you have watched? can they have watched?
Perfecto con V-ing
can I have been watching? can you have been watching? can he have been watching? can we have been watching? can you have been watching? can they have been watching?
Forma interro-negativa
Forma simple
can't I watch? can't you watch? can't he watch? can't we watch? can't you watch? can't they watch?
Forma con V-ing
can't I be watching? can't you be watching? can't he be watching? can't we be watching? can't you be watching? can't they be watching?
Perfecto
can't I have watched? can't you have watched? can't he have watched? can't we have watched? can't you have watched? can't they have watched?
Perfecto con V-ing
can't I have been watching? can't you have been watching? can't he have been watching? can't we have been watching? can't you have been watching? can't they have been watching?