1. I have to study hard.

=> I wish I didn't have to study hard.

2. We had a lot of homework yesterday.

=> I wish we hadn't had a lot of homework yesterday.

3. It is raining heavily.

=> I wish it weren't raining heavily.

4. It was cold last night.

=> I wish it hadn't been cold last night.

5. They work slowly.

=> I wish they didn't work slowly.

5. She doesn't join in the trip.

=> I wish she joined in the trip.

6. I am not good at english.

=> I wish I were good at english.

7. He studies badly.

=> I wish he didn't study badly.

8. He doesn't like playing sports.

=> I wish he liked playing sports.

9. I don't have a computer.

=> I wish I had a computer.

10. Today isn't a holiday.

=> I wish today were a holiday.

11. I can't sing this song.

=> I wish I could sing this song.

12. He has punished by his mother.

=> I wish he hadn't punished by his mother.

13. They won't come here again.

=> I wish they would come here again.

14. He won't go swimming with me.

=> I wish he would go swimming with me.

15. We didn't understand them.

=> We wish we had understood them.

16. I will be late for school.

=> I wish I wouldn't be late for school.

17. the bus was late today.

=> I wish the bus hadn't been late today.

18. she doesn't like this place.

=> I wish she liked this place.