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.