I could bitter you could bitter he could bitter we could bitter you could bitter they could bitter
Forma com V-ing
I could be bittering you could be bittering he could be bittering we could be bittering you could be bittering they could be bittering
Perfeito
I could have bittered you could have bittered he could have bittered we could have bittered you could have bittered they could have bittered
Perfeito com V-ing
I could have been bittering you could have been bittering he could have been bittering we could have been bittering you could have been bittering they could have been bittering
Negação
Forma simple
I could not bitter you could not bitter he could not bitter we could not bitter you could not bitter they could not bitter
Forma com V-ing
I could not be bittering you could not be bittering he could not be bittering we could not be bittering you could not be bittering they could not be bittering
Perfeito
I could not have bittered you could not have bittered he could not have bittered we could not have bittered you could not have bittered they could not have bittered
Perfeito com V-ing
I could not have been bittering you could not have been bittering he could not have been bittering we could not have been bittering you could not have been bittering they could not have been bittering
Forma interrogativa
Forma simple
could I bitter? could you bitter? could he bitter? could we bitter? could you bitter? could they bitter?
Forma com V-ing
could I be bittering? could you be bittering? could he be bittering? could we be bittering? could you be bittering? could they be bittering?
Perfeito
could I have bittered? could you have bittered? could he have bittered? could we have bittered? could you have bittered? could they have bittered?
Perfeito com V-ing
could I have been bittering? could you have been bittering? could he have been bittering? could we have been bittering? could you have been bittering? could they have been bittering?
Forma interro-Negação
Forma simple
could I not bitter? could you not bitter? could he not bitter? could we not bitter? could you not bitter? could they not bitter?
Forma com V-ing
could I not be bittering? could you not be bittering? could he not be bittering? could we not be bittering? could you not be bittering? could they not be bittering?
Perfeito
could I not have bittered? could you not have bittered? could he not have bittered? could we not have bittered? could you not have bittered? could they not have bittered?
Perfeito com V-ing
could I not have been bittering? could you not have been bittering? could he not have been bittering? could we not have been bittering? could you not have been bittering? could they not have been bittering?