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