Отрицание и вопросительная форма

1. They don't ski in the park. Do they ski in the park? 2. He doesn't  help Oleg. Does he help Oleg? 3.  They don't run in the park. Do they run in the park? 4. He doesn't swim in the swimming pool. Does he swim in the swimming pool? 5. She doesn't dance on the ice. Does  she dance on the ice?