Ich stelle den Stuhl vor das Fenster.

I put the chair in front of the window.

Breakdown of Ich stelle den Stuhl vor das Fenster.

• ich: I
• der Stuhl: the chair
• das Fenster: the window
• vor: in front of
• den: the; (masculine, accusative)
• das: the; (neuter, accusative)
• stellen: to put

Questions & Answers about Ich stelle den Stuhl vor das Fenster.

Why is vor followed by das Fenster in the accusative case instead of the dative?

Vor is a two‑way preposition (Wechselpräposition). When you indicate movement or direction toward a place, you use the accusative. Here, you’re moving the chair in front of the window, so it’s vor das Fenster. If you were just describing a static location (“in front of the window”), you’d use the dative: vor dem Fenster.

Why is den Stuhl in the accusative case?

Den Stuhl is the direct object of the verb stellen. The chair is what’s being placed, so it takes the accusative case. Stuhl is masculine, so its accusative article is den (nominative would be der).

Why use stellen instead of legen or setzen?

German has several “placement” verbs that differ by the orientation of the object or subject:

• stellen: to place something upright (e.g. a chair, a bottle)
• legen: to lay something down flat (e.g. a book, a blanket)
• setzen: to set someone/somebody down or to sit oneself down
  Since a chair is upright, you “stellen” it.

Could I instead say Ich stelle den Stuhl vor dem Fenster?

Grammatically yes, but vor dem Fenster (dative) emphasizes the location/state after placement rather than the action of moving it there. It would read more like “I position the chair in front of the window (and it stays there).” In most contexts, when describing the action of placing, German uses the accusative with Wechselpräpositionen.

How would I say “I’m standing in front of the window” (i.e. describing my own position, not moving anything)?

Use the verb stehen (to stand) with the dative case for location:
Ich stehe vor dem Fenster.

Why is Fenster neuter (das Fenster), and how can I tell?

Every German noun has a fixed gender (masculine, feminine, or neuter). Fenster happens to be neuter, so its definite article is das. Unfortunately, there’s no rule that covers all cases; the best strategy is to learn each noun together with its article.

Which other prepositions behave like vor—using accusative for movement and dative for location?

Common two‑way prepositions include:

• in (in)
• auf (on)
• hinter (behind)
• über (over/above)
• unter (under)
• neben (next to)
• zwischen (between)
  Use accusative when indicating movement toward a place, and dative for a static location.