Breakdown of Die Lampe an der Zimmerdecke leuchtet hell.
leuchten
to shine
an
on
hell
brightly
die Lampe
the lamp
Questions & Answers about Die Lampe an der Zimmerdecke leuchtet hell.
What is the case and function of die Lampe in the sentence?
die Lampe is the subject of the sentence, so it’s in the nominative case. In German, the nominative case marks the actor or “doer” of the verb—in this case, the thing that leuchtet.
Why is an der Zimmerdecke used, and why is der the correct article here?
The preposition an when indicating a static location (“at/on”) governs the dative case. Zimmerdecke is a feminine noun, so its dative singular article is der. Hence an der Zimmerdecke literally means “at (or on) the ceiling.”
Why is Zimmerdecke written as one word and how do I know its gender?
German creates compound nouns by simply joining words: Zimmer (“room”) + Decke (“ceiling”) → Zimmerdecke. The gender of a compound noun is always that of its final element. Since Decke is feminine, Zimmerdecke is also feminine.
How do I know that an der Zimmerdecke modifies die Lampe and not the verb leuchtet?
Because the prepositional phrase appears immediately after die Lampe, it belongs to the noun phrase, specifying which lamp. If it modified the verb—telling where the shining occurs—you would either move it or rephrase (and in that case you’d often use accusative for direction: e.g. leuchtet an die Zimmerdecke for “shines onto the ceiling”).