Questions & Answers about Ik ben trots op jou.
Because trots selects the preposition op. It’s a fixed pattern: trots op (iemand/iets). It parallels English “proud of,” but Dutch picks a different preposition.
- Other common patterns: boos op (angry at a person), boos over (angry about a thing), gek op (crazy about/fond of), verliefd op (in love with), jaloers op (jealous of), blij met (happy with).
After a preposition like op, you need the object form. Jou is the stressed object pronoun; jij is a subject pronoun; je is the unstressed form that can act as subject or object.
- Subject: Jij bent mijn zoon.
- Object after a preposition: Ik ben trots op jou.
- Unstressed/neutral: Ik ben trots op je.
- jou = object form of “you” (after prepositions or as direct object): Ik ben trots op jou.
- jouw = possessive “your”: Ik ben trots op jouw werk.
They’re pronounced the same but used differently.