34k. LA VOZ PASIVA. THE PASSIVE VOICE (Tema 60, desde la página 331 hasta la página 338 de Gramática Inglesa para Estudiantes Españoles).

34k. Transform the following sentences into the passive voice. Do not mention the agent unless it seems necessary (60.1, 60.1.1, y 60.1.2; páginas 331, 332 y 333 de Gramática Inglesa para Estudiantes Españoles):

34k. Transform the following sentences into the passive voice. Do not mention the agent unless it seems necessary (60.1, 60.1.1, y 60.1.2; páginas 331, 332 y 333 de Gramática Inglesa para Estudiantes Españoles):

1. Someone must do it again
2. Why must we do it now?
3. They did not have to buy the tickets
4. Men had to wear a jacket and tie
5. Mum has to do all the washing
6. Someone must have found it
7. They are demolishing the building
8. People used to do these calculations
9. The guests ate all the sandwishes
10. Has anyone posted the parcel?