помогите. Paraphrase the following sentences referring them to the past and to the future.
Model: I must go there at once. — I had to go there at once. — I shall have to go there at once.
1. I must catch up with my class. 2. The man must sell his house. 3. She must turn off the radio. 4. You must be there at nine. 5. The girl must water flowers. 6. They must get up at six. 7. His sister must go shopping. 8. We must work in the reading-hall. 9. They must stay at home, 10. You must pay for it.

Model: I must go there at once. — I had to go there at once. — I shall have to go there at once. 1. I must catch up with my class. - I had to catch up with my class. - I shall have to catch up with my class 2. The man must sell his house. - The man had to sell his house. - The man will have to sell his house.  3. She must turn off the radio. - She had to turn off the radio. - She will have to turn off the radio. 4. You must be there at nine. - You had to be there at nine.  - You will have to be there at nine.   5. The girl must water flowers. - The girl had to water flowers. - The girl will have to water flowers. 6. They must get up at six. - They had to get up at six. - They will have to get up at six. 7. His sister must go shopping. - His sister had to go shopping. - His sister will have to go shopping.   8. We must work in the reading-hall. - We had to work in the reading-hall. - We will have to work in the reading-hall. 9. They must stay at home. - They had to stay at home. - They will have to stay at home. 10. You must pay for it. - You had to pay for it. - You will have to pay for it.