Popov invented radio in Russia
Radio was invented by Popov in Russia.
Every four years people elect a new president in the USA.
A new president is elected every four years in the USA.
George didn’t repair my clock.
My clock wasn’t repaired by George
The police caught a bank robber last night.
A bank robber was caught by the police last night
Wait a little, my neighbor is telling an interesting story.
Wait a little, an interesting story is being told by my neighbor
You must clean your bedroom tonight.
Your bedroom must be cleaned tonight
Sorry, we don’t allow dogs in our safari park.
Sorry, dogs are not allowed in our safari park.
The postman will leave my letter by the door.
My letter will be left by the postman by the door.
My son can write some more articles about football.
Some more articles about football can be written by my son.
My mum has made a delicious cherry pie for dinner.
A delicious cherry pie has been made by my mum for dinner