Here are seven questions using "have to" that you can ask your pen pal:
1. Do you have to wear a uniform at school?
2. Do you have to do chores around the house?
3. Do you have to wake up early on weekends?
4. Do you have to study every day?
5. Do you have to help your parents with shopping?
6. Do you have to walk the dog?
7. Do you have to practice a musical instrument?