Terms for subject Makarov containing а вдруг

Russian	English
а вдруг возникнет пожар?	suppose a fire broke out
он называл меня на "вы" и мне это понравилось, а теперь вдруг на "ты"	he had spoken to me in the formal way in which grown-ups are addressed and I had liked it, but now he had suddenly changed to the familiar form