Объяснить на русском почему убедительная либо отрицательная.
1. I have to do it tonight. It's urgent!(убедительная)
2. You don't have to water the plants. i've done it.(отрицательная)
3. Do you have to leave so early?(убедительная)
4. He doesn't have to go to school. He's ill.(отрицательная)
5. You have to pay £10 to become a member.(убедительная)