1, If the lift doesnt work, we will use the stairs.
2, If I could save up enough money, I would buy a new car.
3, If this were a very good camera, the photos I took would be clear.
4, If I were you, I would not drink too much coffee.
5, If we had had your address, we would have sent you a Christmas card.
6, If the bus drivers are on the strike tomorrow, I will probably catch a taxi.