1. I wish I had taken my doctor's advice.
2. If we had had a map, we wouldn't have got lost.
3. He regretted not having said goodbye to her at the airport.
4. If Mr. Mills hadn't been late, he wouldn't have lost his job.
5. Should there be a fire, please do not use the lift.
6. If he hadn't be late for work every morning, he wouldn't have lost his job.
7. Were you to get caught doing this, you will go to prison.
8. Were it not for your generous contribution, we couldn't contribute our work.
9. But for Jim's greater speed, John would have won a gold medal.
10. The students regretted not having attended the lecture.