I could burrow you could burrow he could burrow we could burrow you could burrow they could burrow
Forma com V-ing
I could be burrowing you could be burrowing he could be burrowing we could be burrowing you could be burrowing they could be burrowing
Perfeito
I could have burrowed you could have burrowed he could have burrowed we could have burrowed you could have burrowed they could have burrowed
Perfeito com V-ing
I could have been burrowing you could have been burrowing he could have been burrowing we could have been burrowing you could have been burrowing they could have been burrowing
Negação
Forma simple
I could not burrow you could not burrow he could not burrow we could not burrow you could not burrow they could not burrow
Forma com V-ing
I could not be burrowing you could not be burrowing he could not be burrowing we could not be burrowing you could not be burrowing they could not be burrowing
Perfeito
I could not have burrowed you could not have burrowed he could not have burrowed we could not have burrowed you could not have burrowed they could not have burrowed
Perfeito com V-ing
I could not have been burrowing you could not have been burrowing he could not have been burrowing we could not have been burrowing you could not have been burrowing they could not have been burrowing
Forma interrogativa
Forma simple
could I burrow? could you burrow? could he burrow? could we burrow? could you burrow? could they burrow?
Forma com V-ing
could I be burrowing? could you be burrowing? could he be burrowing? could we be burrowing? could you be burrowing? could they be burrowing?
Perfeito
could I have burrowed? could you have burrowed? could he have burrowed? could we have burrowed? could you have burrowed? could they have burrowed?
Perfeito com V-ing
could I have been burrowing? could you have been burrowing? could he have been burrowing? could we have been burrowing? could you have been burrowing? could they have been burrowing?
Forma interro-Negação
Forma simple
could I not burrow? could you not burrow? could he not burrow? could we not burrow? could you not burrow? could they not burrow?
Forma com V-ing
could I not be burrowing? could you not be burrowing? could he not be burrowing? could we not be burrowing? could you not be burrowing? could they not be burrowing?
Perfeito
could I not have burrowed? could you not have burrowed? could he not have burrowed? could we not have burrowed? could you not have burrowed? could they not have burrowed?
Perfeito com V-ing
could I not have been burrowing? could you not have been burrowing? could he not have been burrowing? could we not have been burrowing? could you not have been burrowing? could they not have been burrowing?