8.
1. Granny has to feed the chickens every day.
Negativ: Granny doesn't have to feed the chinkens every day.
Interogativ: Does granny have to feed the chickens everyday?
2. Farmers have to work hard on the farms.
Negativ: Farmers don't have to work hard on the farms.
Interogativ: Do farmers have to work hard on the farms?
3. Grandpa has to clean the stable.
Negativ: Grandpa doesn't have to clean the stable.
Interogativ: Does grandpa have to clean the stables?
4. Mother has to cook dinner.
Negativ: Mother doesn't have to cook dinner.
Interogativ: Does mother have to cook dinner?
5. In springs farmers have to turn the soil.
Negativ: In springs farmers don't have to turn the soil.
Interogativ: Do farmers have to turn the soil in spring?
9.
1. doesn't have to
2. must
3. have to
4. doesn' have to
5. mustn't
6. have to
7. mustn't
