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 couldn't shake you couldn't shake she couldn't shake we couldn't shake you couldn't shake they couldn't shake
Forma con V-ing
I couldn't be shaking you couldn't be shaking she couldn't be shaking we couldn't be shaking you couldn't be shaking they couldn't be shaking
Perfecto
I couldn't have shaken you couldn't have shaken she couldn't have shaken we couldn't have shaken you couldn't have shaken they couldn't have shaken
Perfecto con V-ing
I couldn't have been shaking you couldn't have been shaking she couldn't have been shaking we couldn't have been shaking you couldn't have been shaking they couldn't 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
couldn't I shake? couldn't you shake? couldn't she shake? couldn't we shake? couldn't you shake? couldn't they shake?
Forma con V-ing
couldn't I be shaking? couldn't you be shaking? couldn't she be shaking? couldn't we be shaking? couldn't you be shaking? couldn't they be shaking?
Perfecto
couldn't I have shaken? couldn't you have shaken? couldn't she have shaken? couldn't we have shaken? couldn't you have shaken? couldn't they have shaken?
Perfecto con V-ing
couldn't I have been shaking? couldn't you have been shaking? couldn't she have been shaking? couldn't we have been shaking? couldn't you have been shaking? couldn't they have been shaking?