Someone cleans the windows every Monday
The windows are cleaned every Monday
They built this bridge in 1602
This bridge was built in 1602
Sharks have killed dozens of surfers each year.
Dozens of surfers have been killed each year by sharks.
Someone sells coconuts at the beach
Coconuts are sold at the beach
Tom Clancy wrote this book
This book was written by Tom Clancy
Picasso has painted over 100 paintings in the 19th c.
Over 100 paintings have been painted by Picasso in the 19th c.
They cut down thousands of trees every day
Thousands of trees are cut down every day
Alexander Fleming discovered penicillin
Penicillin was discovered by Alexander Fleming
Fishermen had killed a great white shark before you came.
A great white shark had been killed last week by fishermen before you came.
Many consider the iPhone to be the best phone ever
The iPhone is considered to be the best phone ever
People didn’t use credit cards much 30 years ago
Credit cards weren’t used much 30 years ago
A large number of people haven't read Hemingway!
Hemingway hasn't been read by a large number of people.
Many consider U2 the most successful band ever
U2 are considered the most successful band ever
Picasso painted some of the most expensive paintings ever
Some of the most expensive paintings ever were painted by Picasso
Students haven't finished the project.
The project hasn't been finished by the students.