a) I would have phoned the police if I had seen anything strange
b) I would have bought you a present if I had known it was your birthday
c) Tina would have been in a difficulty if I hadn't helped her
d) They would have arrived in time if there hadn't been an accident on the road
e) Helen would have bought us a drink if she had won the game
f) If I had lived in Amatrice, I would have been frightened by earthquakes
