Questions & Answers about Vi har brug for ren olie.
Why is the adjective ren used without an ending here?
Olie (oil) is an uncountable mass noun, but it still has a grammatical gender: it is a common gender (en) word. When an adjective describes an indefinite common gender noun, it takes the base form with no ending. If it had been a neuter mass noun like vand (water), the adjective would take a -t ending: rent vand.
Why do we use har brug for instead of a single verb for "need"?
Danish doesn't have a direct single-word verb that perfectly matches the English "need" in this daily context. Instead, you use the fixed phrase at have brug for (literally "to have use for"). So, "we need" translates to vi har brug for.
Why isn't there an article like en before ren olie?
In this sentence, olie acts as a mass noun referring to an uncountable substance, just like in English. We say "clean oil" instead of "a clean oil", so Danish similarly drops the article and just says ren olie.
Can ren olie also mean "pure oil"?
Yes! The Danish adjective ren translates to both "clean" (free from dirt) and "pure" (unmixed or unadulterated). The exact meaning depends on the context of the sentence.