1. He has a sore throat, so he will have to go to the doctor tomorrow.
2. The children don't have to get up early now. It' summer.
3. I have already watered the plants, you won't have to water them in the evening.
4. The students have to do a lot of homework every day. They are going to have a test in a week.
5. My grandma has to wear glasses. She can't see well.
6. "Let's plant the flowers now, so we won't have to do it tomorrow."