If Darwin's theory is true, why we don't see that apes are being changed to men?

Darwin says in his 'Theory of Evolution' that apes are the forefathers of men. If so we should see(anywhere in the world)apes in the midway between ape and man,ie ,ape-like man or man-like ape.But we dont see such phenominon.Doesn't this interpret that Darwin's theory is untrue?