1. He missed his flight because the taxi didn’t arrive on time. If the taxi had arrived on time, he wouldn't have missed his flight.
2. My car broke down so I was late for work. If my car hadn't broken down, I wouldn't have been late for work.
3. The event was cancelled because several people were unable to attend. If everyone had been able to attend, the event wouldn't have been cancelled.
4. I was able to buy a car because Jim lent me the money. If Jim hadn't lent me the money, I wouldn't have been able to buy a car.
5. She didn’t buy a house because she didn’t have enough money. If she had had enough money, she would have bought a house.
6. I didn’t sell my shares after six months so I didn’t make a lot of money. If I had sold my shares after six months, I would have been able to make a lot of money.
7. I took so many risks last year and I lost so much. If I hadn't taken so many risks last year, I wouldn't have lost so much.
8. The employees didn’t go on strike last month because the company improved their pension scheme. If the company hadn't improved their pension scheme, the employees would have gone on strike.
9. The accident happened because the driver in front stopped suddenly. If the driver in front hadn't stopped suddenly, the accident wouldn't have happened.
10. We didn’t have much free time so we couldn’t go out more often. If we had had more free time, we could have been able to go out more often.