I could center you could center he could center we could center you could center they could center
Forma com V-ing
I could be centering you could be centering he could be centering we could be centering you could be centering they could be centering
Perfeito
I could have centered you could have centered he could have centered we could have centered you could have centered they could have centered
Perfeito com V-ing
I could have been centering you could have been centering he could have been centering we could have been centering you could have been centering they could have been centering
Negação
Forma simple
I could not center you could not center he could not center we could not center you could not center they could not center
Forma com V-ing
I could not be centering you could not be centering he could not be centering we could not be centering you could not be centering they could not be centering
Perfeito
I could not have centered you could not have centered he could not have centered we could not have centered you could not have centered they could not have centered
Perfeito com V-ing
I could not have been centering you could not have been centering he could not have been centering we could not have been centering you could not have been centering they could not have been centering
Forma interrogativa
Forma simple
could I center? could you center? could he center? could we center? could you center? could they center?
Forma com V-ing
could I be centering? could you be centering? could he be centering? could we be centering? could you be centering? could they be centering?
Perfeito
could I have centered? could you have centered? could he have centered? could we have centered? could you have centered? could they have centered?
Perfeito com V-ing
could I have been centering? could you have been centering? could he have been centering? could we have been centering? could you have been centering? could they have been centering?
Forma interro-Negação
Forma simple
could I not center? could you not center? could he not center? could we not center? could you not center? could they not center?
Forma com V-ing
could I not be centering? could you not be centering? could he not be centering? could we not be centering? could you not be centering? could they not be centering?
Perfeito
could I not have centered? could you not have centered? could he not have centered? could we not have centered? could you not have centered? could they not have centered?
Perfeito com V-ing
could I not have been centering? could you not have been centering? could he not have been centering? could we not have been centering? could you not have been centering? could they not have been centering?