Change the tense without changing the subject’s role
In each version, the document receives the checking action. Present wird becomes simple-past wurde; the perfect uses ist with geprüft worden. In the plural, use the matching auxiliary forms rather than agreeing with a later agent phrase.
Die Dokumente wurden gestern geprüft.
The documents were checked yesterday.
Worden is a special passive form
For lexical becoming, use geworden, as in becoming quiet. After another participle in the process passive, use worden. This is a distinction between two uses of werden, not a general instruction to remove ge- from participles.
Der Motor ist leiser geworden. Der Motor ist repariert worden.
The engine has become quieter. The engine has been repaired.
Name the agent only when useful
A passive sentence can omit the person doing the action. To identify that person, use von with dative: von einer Technikerin. The preposition determines the case inside its phrase; the affected subject still determines the verb’s number.
Die Motoren wurden von einer Technikerin geprüft.
The engines were checked by a technician.
Practise this pattern
The matching block includes guided questions, a separate mastery check and spaced review. The first 10 blocks and two samples at each higher level are free; other blocks require course access or an eligible seven-day trial. These tasks practise specific grammar patterns and do not certify a complete language level.
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References
Original explanations and examples informed by grammar references. Level placement is an editorial teaching choice.