Breakdown of Den parfymör som väljer essensen måste vara erfaren.
vara
to be
måste
to have to, must
välja
to choose
den
the (with en-words)
Questions & Answers about Den parfymör som väljer essensen måste vara erfaren.
Why does this sentence use Den parfymör instead of the definite form Den parfymören?
This is the determinative pronoun construction. When you want to single out a specific person or thing that is immediately defined by a restrictive relative clause (the som clause), you use Den (or Det / De) followed by the indefinite noun. It acts as a more formal way of saying 'That particular perfumer who...'.
Is it grammatically correct to just say Parfymören som väljer essensen... without using Den?
Yes, absolutely! Saying Parfymören som... (using the standard definite noun) is the most common and natural way to express this in everyday speech. The Den parfymör som... structure is just a slightly more formal, emphatic alternative used heavily in writing or careful speech.
Could I use vilken instead of som to mean 'who' in this sentence?
It is technically possible in highly formal written Swedish, but som is by far the preferred and most natural choice here. When a relative clause strictly defines the noun before it, som is almost exclusively used for 'who', 'which', or 'that'.
Why does the adjective erfaren end in -en here?