Breakdown of Wir haben den reparierten originalen Motor vorsichtig eingebaut.
haben
to have
wir
we
vorsichtig
careful / carefully
reparieren
to repair
der
who, which, that (relative pronoun; die, das)
der Motor
the engine
original
original
einbauen
to install (build in)
Questions & Answers about Wir haben den reparierten originalen Motor vorsichtig eingebaut.
Why do both reparierten and originalen end in -en?
When you stack multiple adjectives in front of a noun, they all take the exact same declension ending. Here, Motor is a masculine noun acting as the direct object (accusative case). Because it follows the definite article den, the adjectives use the "weak" declension. For a masculine accusative noun, that weak ending is always -en.
Is reparierten functioning as a verb or an adjective here?
It's a past participle functioning as an adjective! In German, you can take a completed action (like repariert from reparieren) and place it right in front of a noun to describe its state. When used this way, it needs an adjective ending, which is why it becomes den reparierten Motor (the repaired engine).
Why does the adverb vorsichtig come after the long object phrase instead of before it?
In German sentence structure, an adverb of manner (like vorsichtig) usually comes after a specific, known direct object. Because the direct object here (den reparierten originalen Motor) uses a definite article (den), it's highly specific, pushing the adverb closer to the end of the sentence, just before the final verb (eingebaut).
Could I use installieren instead of einbauen for "installed"?
You could, but einbauen is much more natural here. While installieren is commonly used for software, apps, or building-wide utilities (like plumbing or electrical systems), einbauen (literally "to build into") is the standard word for physically fitting a mechanical component—like an engine, a car radio, or a window—into a larger structure.
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