Engineers build bridges.
Bridges are built by engineers.
Architects design houses.
Houses are designed by architects.
Tom cooks delicious pasta.
Delicious pasta is cooked by Tom.
Musicians play pianos.
Pianos are played by musicians.
Pilots fly planes.
Planes are flown by pilots
My mother opens the door.
The door is opened by my mother.
My dad washes the car on Sundays.
The car is washed by my dad on Sundays.
Visitors discover the gold.
The gold is discovered by visitors.
Many people of different countries speak English.
English is spoken by many people of different countries.
Jake and Jill don't clean the dining table.
The dining table isn't cleaned by Jake and Jill.
Doctors check sick people.
Sick people are checked by doctors.
David doesn't answer the questions.
The questions aren't answered by David.
I don't take the picture of the zoo.
The picture of the zoo isn't taken by me.
Anna doesn't cancel the meeting.
The meeting isn't cancelled by Anna.
The boys don't break the window.
The window isn't broken by the boys.
Do people cut down trees?
Are trees cut down by people?
