I could cache you could cache he could cache we could cache you could cache they could cache
Forma com V-ing
I could be caching you could be caching he could be caching we could be caching you could be caching they could be caching
Perfeito
I could have cached you could have cached he could have cached we could have cached you could have cached they could have cached
Perfeito com V-ing
I could have been caching you could have been caching he could have been caching we could have been caching you could have been caching they could have been caching
Negação
Forma simple
I could not cache you could not cache he could not cache we could not cache you could not cache they could not cache
Forma com V-ing
I could not be caching you could not be caching he could not be caching we could not be caching you could not be caching they could not be caching
Perfeito
I could not have cached you could not have cached he could not have cached we could not have cached you could not have cached they could not have cached
Perfeito com V-ing
I could not have been caching you could not have been caching he could not have been caching we could not have been caching you could not have been caching they could not have been caching
Forma interrogativa
Forma simple
could I cache? could you cache? could he cache? could we cache? could you cache? could they cache?
Forma com V-ing
could I be caching? could you be caching? could he be caching? could we be caching? could you be caching? could they be caching?
Perfeito
could I have cached? could you have cached? could he have cached? could we have cached? could you have cached? could they have cached?
Perfeito com V-ing
could I have been caching? could you have been caching? could he have been caching? could we have been caching? could you have been caching? could they have been caching?
Forma interro-Negação
Forma simple
could I not cache? could you not cache? could he not cache? could we not cache? could you not cache? could they not cache?
Forma com V-ing
could I not be caching? could you not be caching? could he not be caching? could we not be caching? could you not be caching? could they not be caching?
Perfeito
could I not have cached? could you not have cached? could he not have cached? could we not have cached? could you not have cached? could they not have cached?
Perfeito com V-ing
could I not have been caching? could you not have been caching? could he not have been caching? could we not have been caching? could you not have been caching? could they not have been caching?