Breakdown of Heute Morgen habe ich der Nachbarin einen Brief geschrieben.
Questions & Answers about Heute Morgen habe ich der Nachbarin einen Brief geschrieben.
The verb schreiben requires two objects:
- an indirect object (the person you write to) in the dative
- a direct object (the thing you write) in the accusative
Since Nachbarin is feminine, its nominative die Nachbarin changes to der Nachbarin in the dative singular.
Look at the roles:
- der Nachbarin is the recipient → indirect object → dative
- einen Brief is the thing being written → direct object → accusative
You can also spot it by the articles:
- der (feminine dative)
- einen (masculine accusative)