I could reregister you could reregister she could reregister we could reregister you could reregister they could reregister
V-ing form
I could be reregistering you could be reregistering she could be reregistering we could be reregistering you could be reregistering they could be reregistering
Perfect
I could have reregistered you could have reregistered she could have reregistered we could have reregistered you could have reregistered they could have reregistered
V-ing perfect
I could have been reregistering you could have been reregistering she could have been reregistering we could have been reregistering you could have been reregistering they could have been reregistering
Negation
Simple form
I could not reregister you could not reregister she could not reregister we could not reregister you could not reregister they could not reregister
V-ing form
I could not be reregistering you could not be reregistering she could not be reregistering we could not be reregistering you could not be reregistering they could not be reregistering
Perfect
I could not have reregistered you could not have reregistered she could not have reregistered we could not have reregistered you could not have reregistered they could not have reregistered
V-ing perfect
I could not have been reregistering you could not have been reregistering she could not have been reregistering we could not have been reregistering you could not have been reregistering they could not have been reregistering
Interrogative form
Simple form
could I reregister? could you reregister? could she reregister? could we reregister? could you reregister? could they reregister?
V-ing form
could I be reregistering? could you be reregistering? could she be reregistering? could we be reregistering? could you be reregistering? could they be reregistering?
Perfect
could I have reregistered? could you have reregistered? could she have reregistered? could we have reregistered? could you have reregistered? could they have reregistered?
V-ing perfect
could I have been reregistering? could you have been reregistering? could she have been reregistering? could we have been reregistering? could you have been reregistering? could they have been reregistering?
Interro-negative form
Simple form
could I not reregister? could you not reregister? could she not reregister? could we not reregister? could you not reregister? could they not reregister?
V-ing form
could I not be reregistering? could you not be reregistering? could she not be reregistering? could we not be reregistering? could you not be reregistering? could they not be reregistering?
Perfect
could I not have reregistered? could you not have reregistered? could she not have reregistered? could we not have reregistered? could you not have reregistered? could they not have reregistered?
V-ing perfect
could I not have been reregistering? could you not have been reregistering? could she not have been reregistering? could we not have been reregistering? could you not have been reregistering? could they not have been reregistering?