I can see you can see she can see we can see you can see they can see
Forma con V-ing
I can be seeing you can be seeing she can be seeing we can be seeing you can be seeing they can be seeing
Perfecto
I can have seen you can have seen she can have seen we can have seen you can have seen they can have seen
Perfecto con V-ing
I can have been seeing you can have been seeing she can have been seeing we can have been seeing you can have been seeing they can have been seeing
Negación
Forma simple
I can't see you can't see she can't see we can't see you can't see they can't see
Forma con V-ing
I can't be seeing you can't be seeing she can't be seeing we can't be seeing you can't be seeing they can't be seeing
Perfecto
I can't have seen you can't have seen she can't have seen we can't have seen you can't have seen they can't have seen
Perfecto con V-ing
I can't have been seeing you can't have been seeing she can't have been seeing we can't have been seeing you can't have been seeing they can't have been seeing
Forma interrogativa
Forma simple
can I see? can you see? can she see? can we see? can you see? can they see?
Forma con V-ing
can I be seeing? can you be seeing? can she be seeing? can we be seeing? can you be seeing? can they be seeing?
Perfecto
can I have seen? can you have seen? can she have seen? can we have seen? can you have seen? can they have seen?
Perfecto con V-ing
can I have been seeing? can you have been seeing? can she have been seeing? can we have been seeing? can you have been seeing? can they have been seeing?
Forma interro-negativa
Forma simple
can't I see? can't you see? can't she see? can't we see? can't you see? can't they see?
Forma con V-ing
can't I be seeing? can't you be seeing? can't she be seeing? can't we be seeing? can't you be seeing? can't they be seeing?
Perfecto
can't I have seen? can't you have seen? can't she have seen? can't we have seen? can't you have seen? can't they have seen?
Perfecto con V-ing
can't I have been seeing? can't you have been seeing? can't she have been seeing? can't we have been seeing? can't you have been seeing? can't they have been seeing?