I could notice you could notice she could notice we could notice you could notice they could notice
Forma con V-ing
I could be noticing you could be noticing she could be noticing we could be noticing you could be noticing they could be noticing
Perfecto
I could have noticed you could have noticed she could have noticed we could have noticed you could have noticed they could have noticed
Perfecto con V-ing
I could have been noticing you could have been noticing she could have been noticing we could have been noticing you could have been noticing they could have been noticing
Negación
Forma simple
I could not notice you could not notice she could not notice we could not notice you could not notice they could not notice
Forma con V-ing
I could not be noticing you could not be noticing she could not be noticing we could not be noticing you could not be noticing they could not be noticing
Perfecto
I could not have noticed you could not have noticed she could not have noticed we could not have noticed you could not have noticed they could not have noticed
Perfecto con V-ing
I could not have been noticing you could not have been noticing she could not have been noticing we could not have been noticing you could not have been noticing they could not have been noticing
Forma interrogativa
Forma simple
could I notice? could you notice? could she notice? could we notice? could you notice? could they notice?
Forma con V-ing
could I be noticing? could you be noticing? could she be noticing? could we be noticing? could you be noticing? could they be noticing?
Perfecto
could I have noticed? could you have noticed? could she have noticed? could we have noticed? could you have noticed? could they have noticed?
Perfecto con V-ing
could I have been noticing? could you have been noticing? could she have been noticing? could we have been noticing? could you have been noticing? could they have been noticing?
Forma interro-negativa
Forma simple
could I not notice? could you not notice? could she not notice? could we not notice? could you not notice? could they not notice?
Forma con V-ing
could I not be noticing? could you not be noticing? could she not be noticing? could we not be noticing? could you not be noticing? could they not be noticing?
Perfecto
could I not have noticed? could you not have noticed? could she not have noticed? could we not have noticed? could you not have noticed? could they not have noticed?
Perfecto con V-ing
could I not have been noticing? could you not have been noticing? could she not have been noticing? could we not have been noticing? could you not have been noticing? could they not have been noticing?