Breakdown of Der Wissenschaftler hat das Gerät vielfach geprüft.
haben
to have
das Gerät
the machine / the equipment
der Wissenschaftler
the scientist
prüfen
to check / to test
der
who, which, that (relative pronoun; die, das)
vielfach
manifold
Questions & Answers about Der Wissenschaftler hat das Gerät vielfach geprüft.
Why is vielfach used here instead of oft or mehrmals?
While oft simply means "often," words with the suffix -fach (meaning "-fold") often imply depth or complexity alongside repetition. vielfach suggests the scientist didn't just check it many times, but likely in many different ways or very extensively. mehrmals would strictly mean "several times" without that extra nuance.
Does vielfach need an adjective ending in this sentence?
No, because it is acting as an adverb here, modifying how the device was geprüft (checked). In German, adjectives used as adverbs never take declension endings. If it were placed directly before a noun to describe it, it would need an ending, such as in eine vielfache Prüfung (a multiple examination).
Could I use vielmals instead of vielfach in this context?
No, vielmals sounds unnatural here. Even though the suffix -mals usually indicates the number of times an action happens, vielmals is almost exclusively reserved for polite, formal apologies or thanks, such as Danke vielmals (Thanks a lot). To say you physically did something many times, you should use vielfach, mehrmals, or oft.
Is there a difference between geprüft and überprüft when talking about checking a device?
They are very similar and often interchangeable in this context. prüfen (past participle geprüft) is the general word for testing or examining whether something works or meets a standard. überprüfen has a stronger nuance of "double-checking" or inspecting something to verify it is still correct or safe.
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