2. They won't come here again.
→ If they come here again, it will be surprising.

3. I may not go on a camping trip.
→ If the weather is bad, I may not go on a camping trip.

4. I can't play basketball.
→ If I could play basketball, I would join the team.

5. I would like to have a bigger house.
→ If I had more money, I would like to have a bigger house.

6. I would like them to keep quiet.
→ If they were quiet, I would feel better.

7. You have to clean the floor after meals.
→ If you don't clean the floor after meals, it will get dirty.

8. I'm sorry that I didn't do homework last night.
→ If I had done my homework last night, I wouldn't feel sorry now.

9. It's a pity that you didn't tell me about that.
→ If you had told me about that, things would have been different.

10. I regret staying up late last night.
← If I hadn’t stayed up late last night, I wouldn’t regret it now.