We will clean the classroom.
The classroom will be cleaned.
Lisa writes poems.
Poems are written by Lisa.
I have finished my homework.
My homework has been finished.
The company sold many phones.
Many phones were sold by the company.
She is painting a picture.
A picture is being painted.
The chef has prepared the meal.
The meal has been prepared by the chef.
Tourists visit the museum every day.
The museum is visited by tourists every day.
They are building a new house.
A new house is being built.
He opened the door slowly.
The door was slowly opened.
I will post the letter tomorrow.
The letter will be posted tomorrow.
The dog ate the sandwich.
The sandwich was eaten by the dog.
The students wrote a letter.
A (the) letter was written by the students.
The teacher will explain the lesson.
The lesson will be explained by the teacher.
Tom buys fresh vegetables.
Fresh vegetables are bought by Tom.
My father fixes the car.
The car is fixed by my father.