I could document you could document she could document we could document you could document they could document
Forma con V-ing
I could be documenting you could be documenting she could be documenting we could be documenting you could be documenting they could be documenting
Perfecto
I could have documented you could have documented she could have documented we could have documented you could have documented they could have documented
Perfecto con V-ing
I could have been documenting you could have been documenting she could have been documenting we could have been documenting you could have been documenting they could have been documenting
Negación
Forma simple
I couldn't document you couldn't document she couldn't document we couldn't document you couldn't document they couldn't document
Forma con V-ing
I couldn't be documenting you couldn't be documenting she couldn't be documenting we couldn't be documenting you couldn't be documenting they couldn't be documenting
Perfecto
I couldn't have documented you couldn't have documented she couldn't have documented we couldn't have documented you couldn't have documented they couldn't have documented
Perfecto con V-ing
I couldn't have been documenting you couldn't have been documenting she couldn't have been documenting we couldn't have been documenting you couldn't have been documenting they couldn't have been documenting
Forma interrogativa
Forma simple
could I document? could you document? could she document? could we document? could you document? could they document?
Forma con V-ing
could I be documenting? could you be documenting? could she be documenting? could we be documenting? could you be documenting? could they be documenting?
Perfecto
could I have documented? could you have documented? could she have documented? could we have documented? could you have documented? could they have documented?
Perfecto con V-ing
could I have been documenting? could you have been documenting? could she have been documenting? could we have been documenting? could you have been documenting? could they have been documenting?
Forma interro-negativa
Forma simple
couldn't I document? couldn't you document? couldn't she document? couldn't we document? couldn't you document? couldn't they document?
Forma con V-ing
couldn't I be documenting? couldn't you be documenting? couldn't she be documenting? couldn't we be documenting? couldn't you be documenting? couldn't they be documenting?
Perfecto
couldn't I have documented? couldn't you have documented? couldn't she have documented? couldn't we have documented? couldn't you have documented? couldn't they have documented?
Perfecto con V-ing
couldn't I have been documenting? couldn't you have been documenting? couldn't she have been documenting? couldn't we have been documenting? couldn't you have been documenting? couldn't they have been documenting?