1. They will build this factory next year.
→ This factory will be built next year.
2. The Greens paint his house every day.
→ The Greens' house is painted  every day.
3. Ann will finish the report tonight.
→ The report will be finished by Ann tonight
4. The students discuss their lesson after school.
→ The lesson is discussed by  The students  after school.
5. Someone will steal your car.
→ Your car will be stolen 
6. John will invite Fiona to his birthday party next weekend.
→ Fiona will be invited to john's birthday party next weekend.
7. Her mom prepares dinner after 6 p.m.
→ Dinner is prepaired by mom  after 6 p.m