I could guess you could guess he could guess we could guess you could guess they could guess
Forma com V-ing
I could be guessing you could be guessing he could be guessing we could be guessing you could be guessing they could be guessing
Perfeito
I could have guessed you could have guessed he could have guessed we could have guessed you could have guessed they could have guessed
Perfeito com V-ing
I could have been guessing you could have been guessing he could have been guessing we could have been guessing you could have been guessing they could have been guessing
Negação
Forma simple
I could not guess you could not guess he could not guess we could not guess you could not guess they could not guess
Forma com V-ing
I could not be guessing you could not be guessing he could not be guessing we could not be guessing you could not be guessing they could not be guessing
Perfeito
I could not have guessed you could not have guessed he could not have guessed we could not have guessed you could not have guessed they could not have guessed
Perfeito com V-ing
I could not have been guessing you could not have been guessing he could not have been guessing we could not have been guessing you could not have been guessing they could not have been guessing
Forma interrogativa
Forma simple
could I guess? could you guess? could he guess? could we guess? could you guess? could they guess?
Forma com V-ing
could I be guessing? could you be guessing? could he be guessing? could we be guessing? could you be guessing? could they be guessing?
Perfeito
could I have guessed? could you have guessed? could he have guessed? could we have guessed? could you have guessed? could they have guessed?
Perfeito com V-ing
could I have been guessing? could you have been guessing? could he have been guessing? could we have been guessing? could you have been guessing? could they have been guessing?
Forma interro-Negação
Forma simple
could I not guess? could you not guess? could he not guess? could we not guess? could you not guess? could they not guess?
Forma com V-ing
could I not be guessing? could you not be guessing? could he not be guessing? could we not be guessing? could you not be guessing? could they not be guessing?
Perfeito
could I not have guessed? could you not have guessed? could he not have guessed? could we not have guessed? could you not have guessed? could they not have guessed?
Perfeito com V-ing
could I not have been guessing? could you not have been guessing? could he not have been guessing? could we not have been guessing? could you not have been guessing? could they not have been guessing?