6. I'm terribly sorry, but if you don't have a boarding pass, I can't let you on this flight.
7. If she didn't love eating fish, she would not take up fishing.
8. I wish you could get the time off work to come with us.
9. If I had got around to doing my homework, my teacher wouldn't be so upset with me.
10. If you hadn't been crazy enough to go on the hiking trip, you wouldn't have been exhausted.