I could notice you could notice he could notice we could notice you could notice they could notice
Forma com V-ing
I could be noticing you could be noticing he could be noticing we could be noticing you could be noticing they could be noticing
Perfeito
I could have noticed you could have noticed he could have noticed we could have noticed you could have noticed they could have noticed
Perfeito com V-ing
I could have been noticing you could have been noticing he could have been noticing we could have been noticing you could have been noticing they could have been noticing
Negação
Forma simple
I couldn't notice you couldn't notice he couldn't notice we couldn't notice you couldn't notice they couldn't notice
Forma com V-ing
I couldn't be noticing you couldn't be noticing he couldn't be noticing we couldn't be noticing you couldn't be noticing they couldn't be noticing
Perfeito
I couldn't have noticed you couldn't have noticed he couldn't have noticed we couldn't have noticed you couldn't have noticed they couldn't have noticed
Perfeito com V-ing
I couldn't have been noticing you couldn't have been noticing he couldn't have been noticing we couldn't have been noticing you couldn't have been noticing they couldn't have been noticing
Forma interrogativa
Forma simple
could I notice? could you notice? could he notice? could we notice? could you notice? could they notice?
Forma com V-ing
could I be noticing? could you be noticing? could he be noticing? could we be noticing? could you be noticing? could they be noticing?
Perfeito
could I have noticed? could you have noticed? could he have noticed? could we have noticed? could you have noticed? could they have noticed?
Perfeito com V-ing
could I have been noticing? could you have been noticing? could he have been noticing? could we have been noticing? could you have been noticing? could they have been noticing?
Forma interro-Negação
Forma simple
couldn't I notice? couldn't you notice? couldn't he notice? couldn't we notice? couldn't you notice? couldn't they notice?
Forma com V-ing
couldn't I be noticing? couldn't you be noticing? couldn't he be noticing? couldn't we be noticing? couldn't you be noticing? couldn't they be noticing?
Perfeito
couldn't I have noticed? couldn't you have noticed? couldn't he have noticed? couldn't we have noticed? couldn't you have noticed? couldn't they have noticed?
Perfeito com V-ing
couldn't I have been noticing? couldn't you have been noticing? couldn't he have been noticing? couldn't we have been noticing? couldn't you have been noticing? couldn't they have been noticing?