He was dismissed last month.
They were dismissed last month.
They dismissed him last month.

The car was invented in the twentieth century.
Someone invented the car in the twentieth century.
Someone invents the car in the twentieth century.

The cake was made by the children.
The children have made the cake.
The children made the cake.

The book was written in two months.
I wrote the book in two months.
I will write the book in two months.

We were saved by the police.
The police have saved us.
The police saved us.

The car has been taken to the garage.
I took the car to the garage.
I have taken the car to the garage.

The computer has been broken.
Someone has broken the computer.
Someone broke the computer.

The clothes have just been washed.
I've just washed the clothes.
I will wash the clothes.