9. It's a pity that it never snows in my city.
→ I wish it snowed in my city.

12. Is is too increase my salary next year
---> i wish it weren't too increase my salary next year

16. They won't help us with chores.
→ We wish they would help us with chores.

18. They work too noisily for me to sleep!
→ I wish they didn't work too noisily for me to sleep

9. It's a pity that it never snows in my city.
→ I wish it snowed in my city.

12. Is is too increase my salary next year
---> i wish I would be increased my salary next year

16. They won't help us with chores.
→ We wish they would help us with chores.

18. They work too noisily for me to sleep!
→ I wish They didn't work too noisily for me to sleep