I could buffer you could buffer he could buffer we could buffer you could buffer they could buffer
Forma con V-ing
I could be buffering you could be buffering he could be buffering we could be buffering you could be buffering they could be buffering
Perfecto
I could have buffered you could have buffered he could have buffered we could have buffered you could have buffered they could have buffered
Perfecto con V-ing
I could have been buffering you could have been buffering he could have been buffering we could have been buffering you could have been buffering they could have been buffering
Negación
Forma simple
I couldn't buffer you couldn't buffer he couldn't buffer we couldn't buffer you couldn't buffer they couldn't buffer
Forma con V-ing
I couldn't be buffering you couldn't be buffering he couldn't be buffering we couldn't be buffering you couldn't be buffering they couldn't be buffering
Perfecto
I couldn't have buffered you couldn't have buffered he couldn't have buffered we couldn't have buffered you couldn't have buffered they couldn't have buffered
Perfecto con V-ing
I couldn't have been buffering you couldn't have been buffering he couldn't have been buffering we couldn't have been buffering you couldn't have been buffering they couldn't have been buffering
Forma interrogativa
Forma simple
could I buffer? could you buffer? could he buffer? could we buffer? could you buffer? could they buffer?
Forma con V-ing
could I be buffering? could you be buffering? could he be buffering? could we be buffering? could you be buffering? could they be buffering?
Perfecto
could I have buffered? could you have buffered? could he have buffered? could we have buffered? could you have buffered? could they have buffered?
Perfecto con V-ing
could I have been buffering? could you have been buffering? could he have been buffering? could we have been buffering? could you have been buffering? could they have been buffering?
Forma interro-negativa
Forma simple
couldn't I buffer? couldn't you buffer? couldn't he buffer? couldn't we buffer? couldn't you buffer? couldn't they buffer?
Forma con V-ing
couldn't I be buffering? couldn't you be buffering? couldn't he be buffering? couldn't we be buffering? couldn't you be buffering? couldn't they be buffering?
Perfecto
couldn't I have buffered? couldn't you have buffered? couldn't he have buffered? couldn't we have buffered? couldn't you have buffered? couldn't they have buffered?
Perfecto con V-ing
couldn't I have been buffering? couldn't you have been buffering? couldn't he have been buffering? couldn't we have been buffering? couldn't you have been buffering? couldn't they have been buffering?