Some people think that Benjamin Franklin discovered electricity
Some people think that electricity was discovered by Benjamin Franklin
someone will invent time travel in the future
Time travel will be invented (by someone) in the future
Fernando Alonso is going to win the next race
The next race is going to be won by Fernando Alonso
Someone is following them!
They are being followed (by someone)!
The Police arrest many criminals everyday
Many criminals are arrested (by the Police) everyday
Someone's going to steal that picture
That picture is going to be stolen (by someone)
The celebrity can't post that picture
That picture can't be posted (by the celebrity)
Apple should design iPhones in Spain
iPhones should be designed in Spain
Facebook makes millions of dollars each day
Millions of dollars are made each day (by Facebook)
Marie Curie discovered radium in 1898
Radium was discovered (by Marie Curie) in 1898
Scientifics are discovering many planets
Many planets are being discovered (by scientists)
Some scientists won't clone animals because of moral reasons
Animals won't be cloned (by some scientists) because of moral reasons
An unknown person invented books a long time ago
Books were invented (by an unknown person) a long time ago
Martin Cooper invented the first mobile phone in 1973
The first mobile phone was invented (by Martin Cooper) in 1973
People have used stars for navigation for many centuries
Stars have been used for navigation for many centuries
In the future, teachers will give classes online
In the future, classes will be given online (by teachers)
