I could stale you could stale he could stale we could stale you could stale they could stale
Forma com V-ing
I could be staling you could be staling he could be staling we could be staling you could be staling they could be staling
Perfeito
I could have staled you could have staled he could have staled we could have staled you could have staled they could have staled
Perfeito com V-ing
I could have been staling you could have been staling he could have been staling we could have been staling you could have been staling they could have been staling
Negação
Forma simple
I could not stale you could not stale he could not stale we could not stale you could not stale they could not stale
Forma com V-ing
I could not be staling you could not be staling he could not be staling we could not be staling you could not be staling they could not be staling
Perfeito
I could not have staled you could not have staled he could not have staled we could not have staled you could not have staled they could not have staled
Perfeito com V-ing
I could not have been staling you could not have been staling he could not have been staling we could not have been staling you could not have been staling they could not have been staling
Forma interrogativa
Forma simple
could I stale? could you stale? could he stale? could we stale? could you stale? could they stale?
Forma com V-ing
could I be staling? could you be staling? could he be staling? could we be staling? could you be staling? could they be staling?
Perfeito
could I have staled? could you have staled? could he have staled? could we have staled? could you have staled? could they have staled?
Perfeito com V-ing
could I have been staling? could you have been staling? could he have been staling? could we have been staling? could you have been staling? could they have been staling?
Forma interro-Negação
Forma simple
could I not stale? could you not stale? could he not stale? could we not stale? could you not stale? could they not stale?
Forma com V-ing
could I not be staling? could you not be staling? could he not be staling? could we not be staling? could you not be staling? could they not be staling?
Perfeito
could I not have staled? could you not have staled? could he not have staled? could we not have staled? could you not have staled? could they not have staled?
Perfeito com V-ing
could I not have been staling? could you not have been staling? could he not have been staling? could we not have been staling? could you not have been staling? could they not have been staling?