1. The two thieves wish they *hadn't confessed* to committing the crime.
2. We regret *to inform* you that your application to work in our company will not be taken any further.
3. George wishes he *were singing* in tomorrow's live performance.
4. The young pickpocket's parents regret *not being* there when their son needed them.
5. I wish it *would stop* raining! I'd like to go for a swim.
6. If only we *had bought* bus tickets! We wouldn't be in trouble with the inspector now.