I could blacken you could blacken he could blacken we could blacken you could blacken they could blacken
Forma com V-ing
I could be blackening you could be blackening he could be blackening we could be blackening you could be blackening they could be blackening
Perfeito
I could have blackened you could have blackened he could have blackened we could have blackened you could have blackened they could have blackened
Perfeito com V-ing
I could have been blackening you could have been blackening he could have been blackening we could have been blackening you could have been blackening they could have been blackening
Negação
Forma simple
I could not blacken you could not blacken he could not blacken we could not blacken you could not blacken they could not blacken
Forma com V-ing
I could not be blackening you could not be blackening he could not be blackening we could not be blackening you could not be blackening they could not be blackening
Perfeito
I could not have blackened you could not have blackened he could not have blackened we could not have blackened you could not have blackened they could not have blackened
Perfeito com V-ing
I could not have been blackening you could not have been blackening he could not have been blackening we could not have been blackening you could not have been blackening they could not have been blackening
Forma interrogativa
Forma simple
could I blacken? could you blacken? could he blacken? could we blacken? could you blacken? could they blacken?
Forma com V-ing
could I be blackening? could you be blackening? could he be blackening? could we be blackening? could you be blackening? could they be blackening?
Perfeito
could I have blackened? could you have blackened? could he have blackened? could we have blackened? could you have blackened? could they have blackened?
Perfeito com V-ing
could I have been blackening? could you have been blackening? could he have been blackening? could we have been blackening? could you have been blackening? could they have been blackening?
Forma interro-Negação
Forma simple
could I not blacken? could you not blacken? could he not blacken? could we not blacken? could you not blacken? could they not blacken?
Forma com V-ing
could I not be blackening? could you not be blackening? could he not be blackening? could we not be blackening? could you not be blackening? could they not be blackening?
Perfeito
could I not have blackened? could you not have blackened? could he not have blackened? could we not have blackened? could you not have blackened? could they not have blackened?
Perfeito com V-ing
could I not have been blackening? could you not have been blackening? could he not have been blackening? could we not have been blackening? could you not have been blackening? could they not have been blackening?