If we hadn't turned left, we wouldn't have got lost.
15
I didn't go by train because the ticket was so expensive.
I would have gone by train if the ticket hadn't been so expensive. / If the ticket hadn't been so expensive, I would have gone by train.
15
I didn't meet you at the airport because I didn't know when you were arriving.
If I had known when you were arriving, I would have met you at the airport. / I would have met you at the airport if I had known when you were arriving.
15
We stopped at the service station because we were nearly out of petrol.
If we hadn't been nearly out of petrol, we wouldn't have stopped at the service station.
15
I wasn't late for the meeting because I took a taxi.
If I hadn't taken a taxi, I would have been late for the meeting.
15
I bought the tickets on the train because there wasn't a ticket office at the station.
If there had been a ticket office at the station, I wouldn't have bought the tickets on the train.
15
You missed your train because you didn't check the timetable.
If you had checked the timtable, you wouldn't have missed your train.