An expert is restoring the antique car.

• The antique car is being restored by an expert.

Steven Spielberg has directed a lot of successful films.

• A lot of successful films have been directed by Steven Spielberg.

We will meet the professor at the airport.

• The professor will be met at the airport.

Van Gogh painted Sunflowers.

• Sunflowers were painted by Van Gogh.

Astronauts can explore space.

• Space can be explored by astronauts.

They were servicing her car when I called her.

• Her car was being serviced when I called her.

They have recently finished the project.

• The project has been recently finished.

I hadn't tasted Chinese food before.

• Chinese food hadn't been tasted by me before