Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could update update you could update update he could update update we could update update you could update update they could update update
V-ing form
I could be update updating you could be update updating he could be update updating we could be update updating you could be update updating they could be update updating
Perfect
I could have update updated you could have update updated he could have update updated we could have update updated you could have update updated they could have update updated
V-ing perfect
I could have been update updating you could have been update updating he could have been update updating we could have been update updating you could have been update updating they could have been update updating
Negation
Simple form
I could not update update you could not update update he could not update update we could not update update you could not update update they could not update update
V-ing form
I could not be update updating you could not be update updating he could not be update updating we could not be update updating you could not be update updating they could not be update updating
Perfect
I could not have update updated you could not have update updated he could not have update updated we could not have update updated you could not have update updated they could not have update updated
V-ing perfect
I could not have been update updating you could not have been update updating he could not have been update updating we could not have been update updating you could not have been update updating they could not have been update updating
Interrogative form
Simple form
could I update update? could you update update? could he update update? could we update update? could you update update? could they update update?
V-ing form
could I be update updating? could you be update updating? could he be update updating? could we be update updating? could you be update updating? could they be update updating?
Perfect
could I have update updated? could you have update updated? could he have update updated? could we have update updated? could you have update updated? could they have update updated?
V-ing perfect
could I have been update updating? could you have been update updating? could he have been update updating? could we have been update updating? could you have been update updating? could they have been update updating?
Interro-negative form
Simple form
could I not update update? could you not update update? could he not update update? could we not update update? could you not update update? could they not update update?
V-ing form
could I not be update updating? could you not be update updating? could he not be update updating? could we not be update updating? could you not be update updating? could they not be update updating?
Perfect
could I not have update updated? could you not have update updated? could he not have update updated? could we not have update updated? could you not have update updated? could they not have update updated?
V-ing perfect
could I not have been update updating? could you not have been update updating? could he not have been update updating? could we not have been update updating? could you not have been update updating? could they not have been update updating?