Questions & Answers about Haar jas hangt niet aan de haak.
Why is the preposition aan used here instead of op for "on"?
English uses "on" both for resting on top of a surface (on the table) and for being attached to something (on the wall, on a hook). Dutch makes a strict distinction: you use op for resting on horizontal surfaces, but you must use aan for vertical attachment, suspension, or hanging.
Could I just say Haar jas is niet aan de haak to mean "Her coat is not on the hook"?
People would understand you, but it sounds unnatural. As you may recall from earlier levels, Dutch strongly prefers verbs of posture or position (staan, liggen, zitten, hangen) over the generic verb zijn (to be) to describe where something is located. Because a coat physically hangs, hangt is the most natural choice.
Since this lesson is about past deductions, how would I follow this up with "She must have left"?
You would say Ze moet zijn vertrokken or Ze moet zijn weggegaan. This uses the finite modal verb (moet) paired with the perfect infinitive (zijn vertrokken) to express a strong logical deduction based on the evidence of the missing coat.
Why is niet placed right before aan de haak?