I could document you could document he could document we could document you could document they could document
Forma com V-ing
I could be documenting you could be documenting he could be documenting we could be documenting you could be documenting they could be documenting
Perfeito
I could have documented you could have documented he could have documented we could have documented you could have documented they could have documented
Perfeito com V-ing
I could have been documenting you could have been documenting he could have been documenting we could have been documenting you could have been documenting they could have been documenting
Negação
Forma simple
I could not document you could not document he could not document we could not document you could not document they could not document
Forma com V-ing
I could not be documenting you could not be documenting he could not be documenting we could not be documenting you could not be documenting they could not be documenting
Perfeito
I could not have documented you could not have documented he could not have documented we could not have documented you could not have documented they could not have documented
Perfeito com V-ing
I could not have been documenting you could not have been documenting he could not have been documenting we could not have been documenting you could not have been documenting they could not have been documenting
Forma interrogativa
Forma simple
could I document? could you document? could he document? could we document? could you document? could they document?
Forma com V-ing
could I be documenting? could you be documenting? could he be documenting? could we be documenting? could you be documenting? could they be documenting?
Perfeito
could I have documented? could you have documented? could he have documented? could we have documented? could you have documented? could they have documented?
Perfeito com V-ing
could I have been documenting? could you have been documenting? could he have been documenting? could we have been documenting? could you have been documenting? could they have been documenting?
Forma interro-Negação
Forma simple
could I not document? could you not document? could he not document? could we not document? could you not document? could they not document?
Forma com V-ing
could I not be documenting? could you not be documenting? could he not be documenting? could we not be documenting? could you not be documenting? could they not be documenting?
Perfeito
could I not have documented? could you not have documented? could he not have documented? could we not have documented? could you not have documented? could they not have documented?
Perfeito com V-ing
could I not have been documenting? could you not have been documenting? could he not have been documenting? could we not have been documenting? could you not have been documenting? could they not have been documenting?