I can look you can look he can look we can look you can look they can look
Forma con V-ing
I can be looking you can be looking he can be looking we can be looking you can be looking they can be looking
Perfecto
I can have looked you can have looked he can have looked we can have looked you can have looked they can have looked
Perfecto con V-ing
I can have been looking you can have been looking he can have been looking we can have been looking you can have been looking they can have been looking
Negación
Forma simple
I can't look you can't look he can't look we can't look you can't look they can't look
Forma con V-ing
I can't be looking you can't be looking he can't be looking we can't be looking you can't be looking they can't be looking
Perfecto
I can't have looked you can't have looked he can't have looked we can't have looked you can't have looked they can't have looked
Perfecto con V-ing
I can't have been looking you can't have been looking he can't have been looking we can't have been looking you can't have been looking they can't have been looking
Forma interrogativa
Forma simple
can I look? can you look? can he look? can we look? can you look? can they look?
Forma con V-ing
can I be looking? can you be looking? can he be looking? can we be looking? can you be looking? can they be looking?
Perfecto
can I have looked? can you have looked? can he have looked? can we have looked? can you have looked? can they have looked?
Perfecto con V-ing
can I have been looking? can you have been looking? can he have been looking? can we have been looking? can you have been looking? can they have been looking?
Forma interro-negativa
Forma simple
can't I look? can't you look? can't he look? can't we look? can't you look? can't they look?
Forma con V-ing
can't I be looking? can't you be looking? can't he be looking? can't we be looking? can't you be looking? can't they be looking?
Perfecto
can't I have looked? can't you have looked? can't he have looked? can't we have looked? can't you have looked? can't they have looked?
Perfecto con V-ing
can't I have been looking? can't you have been looking? can't he have been looking? can't we have been looking? can't you have been looking? can't they have been looking?