Afirmação
Forma simple
I could crab
you could crab
he could crab
we could crab
you could crab
they could crab
Forma com V-ing
I could be crabbing
you could be crabbing
he could be crabbing
we could be crabbing
you could be crabbing
they could be crabbing
Perfeito
I could have crabbed
you could have crabbed
he could have crabbed
we could have crabbed
you could have crabbed
they could have crabbed
Perfeito com V-ing
I could have been crabbing
you could have been crabbing
he could have been crabbing
we could have been crabbing
you could have been crabbing
they could have been crabbing
Negação
Forma simple
I could not crab
you could not crab
he could not crab
we could not crab
you could not crab
they could not crab
Forma com V-ing
I could not be crabbing
you could not be crabbing
he could not be crabbing
we could not be crabbing
you could not be crabbing
they could not be crabbing
Perfeito
I could not have crabbed
you could not have crabbed
he could not have crabbed
we could not have crabbed
you could not have crabbed
they could not have crabbed
Perfeito com V-ing
I could not have been crabbing
you could not have been crabbing
he could not have been crabbing
we could not have been crabbing
you could not have been crabbing
they could not have been crabbing
Forma interrogativa
Forma simple
could I crab?
could you crab?
could he crab?
could we crab?
could you crab?
could they crab?
Forma com V-ing
could I be crabbing?
could you be crabbing?
could he be crabbing?
could we be crabbing?
could you be crabbing?
could they be crabbing?
Perfeito
could I have crabbed?
could you have crabbed?
could he have crabbed?
could we have crabbed?
could you have crabbed?
could they have crabbed?
Perfeito com V-ing
could I have been crabbing?
could you have been crabbing?
could he have been crabbing?
could we have been crabbing?
could you have been crabbing?
could they have been crabbing?
Forma interro-Negação
Forma simple
could I not crab?
could you not crab?
could he not crab?
could we not crab?
could you not crab?
could they not crab?
Forma com V-ing
could I not be crabbing?
could you not be crabbing?
could he not be crabbing?
could we not be crabbing?
could you not be crabbing?
could they not be crabbing?
Perfeito
could I not have crabbed?
could you not have crabbed?
could he not have crabbed?
could we not have crabbed?
could you not have crabbed?
could they not have crabbed?
Perfeito com V-ing
could I not have been crabbing?
could you not have been crabbing?
could he not have been crabbing?
could we not have been crabbing?
could you not have been crabbing?
could they not have been crabbing?