We'll make all calls on mobiles.
All calls will be made on mobiles.
Robots will build all machines.
All machines will be built by robots.
Solar farms and wind turbines will generate electricity.
Electricity will be generated by solar farms and wind turbines.
Teachers will give lessons over the Internet.
Lessons will be given over the Internet by teachers.
People from Earth will inhabit Mars.
Mars will be inhabited by people from Earth.
Computers will control cars.
Cars will be controlled by computers.
A team from Africa will win the World Cup.
The World Cup will be won by a team from Africa.
Electricity will power cars and other vehicles.
Cars and other vehicles will be powered by electricity.