Here are the sentences rewritten using "I wish":
1. I don’t have time to study.
→ I wish I had time to study.
2. I didn’t see the TV program last night.
→ I wish I had seen the TV program last night.
3. My friend, John lost his pen.
→ I wish John hadn’t lost his pen.
4. I can’t answer the questions.
→ I wish I could answer the questions.
5. They will leave for France next week.
→ I wish they weren’t leaving for France next week.
6. We are not living in England.
→ I wish we lived in England.
7. She won’t visit me again.
→ I wish she would visit me again.
8. Mary was absent from class yesterday.
→ I wish Mary hadn’t been absent from class yesterday.
9. He is so stupid.
→ I wish he weren’t so stupid.
10. My younger brothers play in the street all day.
→ I wish my younger brothers didn’t play in the street all day.
These sentences express regrets or desires about the present or past using the structure "I wish + past simple/past perfect/modal verb."