De brief wordt geschreven.
English: The letter is being written.
Passive constructions in Dutch are used when the focus is on the action or the receiver of the action, not on who is doing it. In Dutch, the passive voice is often formed with 'worden' (to become) and 'zijn' (to be).
Use the passive voice in Dutch when you want to focus on the object of the action, or when the person doing the action is unknown or not important. It is common in news reports, instructions, and formal writing.
De brief wordt geschreven.
English: The letter is being written.
Het boek is gelezen.
English: The book has been read.
De auto wordt gerepareerd.
English: The car is being repaired.
De taart is gebakken.
English: The cake has been baked.