Breakdown of Að nota vigtina er nauðsynlegt fyrir nákvæmnina.
vera
to be
að
to (infinitive marker)
nota
to use
fyrir
for (fyrir þig)
nauðsynlegur
necessary
nákvæmnin
the precision
vigtin
the scale (f)
Questions & Answers about Að nota vigtina er nauðsynlegt fyrir nákvæmnina.
Why does the adjective take the neuter form nauðsynlegt instead of agreeing with the feminine noun vigtina?
Because the subject of the sentence isn't the scale itself, but the entire action Að nota vigtina (using the scale). When an infinitival clause acts as the subject of a sentence, any adjectives describing it must take the neuter singular form.
Could I rephrase this using það instead of starting with Að nota?
Yes, it is very common and natural to say Það er nauðsynlegt að nota vigtina fyrir nákvæmnina. In that structure, það acts as a placeholder subject, while the heavy infinitival clause gets moved after the adjective. The adjective nauðsynlegt still stays neuter because it agrees grammatically with það.
Fyrir can take either the accusative or the dative. Why is nákvæmnina in the accusative here?
When fyrir means 'for' in the sense of a purpose, benefit, or reason (like 'for the sake of precision'), it governs the accusative case. It generally only takes the dative when describing a physical location (in front of) or time (ago).
What is the root noun of nákvæmnina, and how does its definite article work?
The base noun is nákvæmni (precision), derived from the adjective nákvæmur (precise). Nákvæmni is a feminine noun that keeps its -i ending across all four cases. To make it definite in the accusative, you just attach the standard feminine accusative suffix -na, resulting in nákvæmnina.
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