I could power you could power she could power we could power you could power they could power
V-ing form
I could be powering you could be powering she could be powering we could be powering you could be powering they could be powering
Perfect
I could have powered you could have powered she could have powered we could have powered you could have powered they could have powered
V-ing perfect
I could have been powering you could have been powering she could have been powering we could have been powering you could have been powering they could have been powering
Negation
Simple form
I could not power you could not power she could not power we could not power you could not power they could not power
V-ing form
I could not be powering you could not be powering she could not be powering we could not be powering you could not be powering they could not be powering
Perfect
I could not have powered you could not have powered she could not have powered we could not have powered you could not have powered they could not have powered
V-ing perfect
I could not have been powering you could not have been powering she could not have been powering we could not have been powering you could not have been powering they could not have been powering
Interrogative form
Simple form
could I power? could you power? could she power? could we power? could you power? could they power?
V-ing form
could I be powering? could you be powering? could she be powering? could we be powering? could you be powering? could they be powering?
Perfect
could I have powered? could you have powered? could she have powered? could we have powered? could you have powered? could they have powered?
V-ing perfect
could I have been powering? could you have been powering? could she have been powering? could we have been powering? could you have been powering? could they have been powering?
Interro-negative form
Simple form
could I not power? could you not power? could she not power? could we not power? could you not power? could they not power?
V-ing form
could I not be powering? could you not be powering? could she not be powering? could we not be powering? could you not be powering? could they not be powering?
Perfect
could I not have powered? could you not have powered? could she not have powered? could we not have powered? could you not have powered? could they not have powered?
V-ing perfect
could I not have been powering? could you not have been powering? could she not have been powering? could we not have been powering? could you not have been powering? could they not have been powering?