I could ret you could ret she could ret we could ret you could ret they could ret
Forma com V-ing
I could be retting you could be retting she could be retting we could be retting you could be retting they could be retting
Perfeito
I could have retted you could have retted she could have retted we could have retted you could have retted they could have retted
Perfeito com V-ing
I could have been retting you could have been retting she could have been retting we could have been retting you could have been retting they could have been retting
Negação
Forma simple
I could not ret you could not ret she could not ret we could not ret you could not ret they could not ret
Forma com V-ing
I could not be retting you could not be retting she could not be retting we could not be retting you could not be retting they could not be retting
Perfeito
I could not have retted you could not have retted she could not have retted we could not have retted you could not have retted they could not have retted
Perfeito com V-ing
I could not have been retting you could not have been retting she could not have been retting we could not have been retting you could not have been retting they could not have been retting
Forma interrogativa
Forma simple
could I ret? could you ret? could she ret? could we ret? could you ret? could they ret?
Forma com V-ing
could I be retting? could you be retting? could she be retting? could we be retting? could you be retting? could they be retting?
Perfeito
could I have retted? could you have retted? could she have retted? could we have retted? could you have retted? could they have retted?
Perfeito com V-ing
could I have been retting? could you have been retting? could she have been retting? could we have been retting? could you have been retting? could they have been retting?
Forma interro-Negação
Forma simple
could I not ret? could you not ret? could she not ret? could we not ret? could you not ret? could they not ret?
Forma com V-ing
could I not be retting? could you not be retting? could she not be retting? could we not be retting? could you not be retting? could they not be retting?
Perfeito
could I not have retted? could you not have retted? could she not have retted? could we not have retted? could you not have retted? could they not have retted?
Perfeito com V-ing
could I not have been retting? could you not have been retting? could she not have been retting? could we not have been retting? could you not have been retting? could they not have been retting?