wer

In a sentence

• Wer hat das Buch auf den Tisch gelegt?

  Who put the book on the table?

  In this sentence, "wer" is used as the nominative subject of the verb "hat gelegt," asking for the identity of the actor performing the action.

• Ich frage mich, wer kommen wird.

  I wonder who will come.

  Here, "wer" introduces an indirect question embedded within the main statement, functioning as the subject of "wird kommen."

• Wer auch immer an der Tür klopft, lass ihn herein.

  Whoever knocks on the door, let them in.

  In this example, "wer" is part of the indefinite pronoun "wer auch immer," equivalent to "whoever," referring to an undefined or unknown individual.