I can attend you can attend he can attend we can attend you can attend they can attend
Forma con V-ing
I can be attending you can be attending he can be attending we can be attending you can be attending they can be attending
Perfecto
I can have attended you can have attended he can have attended we can have attended you can have attended they can have attended
Perfecto con V-ing
I can have been attending you can have been attending he can have been attending we can have been attending you can have been attending they can have been attending
Negación
Forma simple
I can't attend you can't attend he can't attend we can't attend you can't attend they can't attend
Forma con V-ing
I can't be attending you can't be attending he can't be attending we can't be attending you can't be attending they can't be attending
Perfecto
I can't have attended you can't have attended he can't have attended we can't have attended you can't have attended they can't have attended
Perfecto con V-ing
I can't have been attending you can't have been attending he can't have been attending we can't have been attending you can't have been attending they can't have been attending
Forma interrogativa
Forma simple
can I attend? can you attend? can he attend? can we attend? can you attend? can they attend?
Forma con V-ing
can I be attending? can you be attending? can he be attending? can we be attending? can you be attending? can they be attending?
Perfecto
can I have attended? can you have attended? can he have attended? can we have attended? can you have attended? can they have attended?
Perfecto con V-ing
can I have been attending? can you have been attending? can he have been attending? can we have been attending? can you have been attending? can they have been attending?
Forma interro-negativa
Forma simple
can't I attend? can't you attend? can't he attend? can't we attend? can't you attend? can't they attend?
Forma con V-ing
can't I be attending? can't you be attending? can't he be attending? can't we be attending? can't you be attending? can't they be attending?
Perfecto
can't I have attended? can't you have attended? can't he have attended? can't we have attended? can't you have attended? can't they have attended?
Perfecto con V-ing
can't I have been attending? can't you have been attending? can't he have been attending? can't we have been attending? can't you have been attending? can't they have been attending?