We have invested a lit of money in new technology.
A lot of money has been invested in new technology
Someone has bought five laptops online using my credit card
Five laptops have been bought online (by someone) using my credit card
They haven't discovered life on other planets yet.
Life on other planets has not been discovered yet
Have faster cars made the roads more dangerous?
Have the roads been made more dangerous by faster cars?
Will computers rule our lives in the future?
Will our lives be ruled by computers in the future?
We won't use paper and pens in the future
In the future, paper and pens won't be used
Solar-powered cars will replace today's cars
Today's cars will be replaced by solar-powered cars
Has the invention of the internet changed society?
Has society been changed by the invention of the internet?