1. I regret drinking so much last night.
 

2. If you do the shopping, I'll cook lunch.
 

3. If Pauline hadn't been interested, the project would have been abandoned.
 

4. I might be late. If so, start without me.
 

5. Dick is in prison because a detective recognised him.
 

6. The fire was put out thanks to the firemen.  

7. If by any chance you find my wallet, could you let me know?
 

8. What would you do if you found some buried treasure?
 

9. What would you do if there was an earthquake?
 

10. Working so much will make you tired.