I could shake you could shake she could shake we could shake you could shake they could shake
Forma con V-ing
I could be shaking you could be shaking she could be shaking we could be shaking you could be shaking they could be shaking
Perfecto
I could have shaken you could have shaken she could have shaken we could have shaken you could have shaken they could have shaken
Perfecto con V-ing
I could have been shaking you could have been shaking she could have been shaking we could have been shaking you could have been shaking they could have been shaking
Negación
Forma simple
I could not shake you could not shake she could not shake we could not shake you could not shake they could not shake
Forma con V-ing
I could not be shaking you could not be shaking she could not be shaking we could not be shaking you could not be shaking they could not be shaking
Perfecto
I could not have shaken you could not have shaken she could not have shaken we could not have shaken you could not have shaken they could not have shaken
Perfecto con V-ing
I could not have been shaking you could not have been shaking she could not have been shaking we could not have been shaking you could not have been shaking they could not have been shaking
Forma interrogativa
Forma simple
could I shake? could you shake? could she shake? could we shake? could you shake? could they shake?
Forma con V-ing
could I be shaking? could you be shaking? could she be shaking? could we be shaking? could you be shaking? could they be shaking?
Perfecto
could I have shaken? could you have shaken? could she have shaken? could we have shaken? could you have shaken? could they have shaken?
Perfecto con V-ing
could I have been shaking? could you have been shaking? could she have been shaking? could we have been shaking? could you have been shaking? could they have been shaking?
Forma interro-negativa
Forma simple
could I not shake? could you not shake? could she not shake? could we not shake? could you not shake? could they not shake?
Forma con V-ing
could I not be shaking? could you not be shaking? could she not be shaking? could we not be shaking? could you not be shaking? could they not be shaking?
Perfecto
could I not have shaken? could you not have shaken? could she not have shaken? could we not have shaken? could you not have shaken? could they not have shaken?
Perfecto con V-ing
could I not have been shaking? could you not have been shaking? could she not have been shaking? could we not have been shaking? could you not have been shaking? could they not have been shaking?