어순 도치가 요구되는 특수 부사들
Adverb Placement in Sentences
https://www.niu.edu/writingtutorial/grammar/adjective-or-adverb.shtml
Sometimes, the use of a certain adverb requires the inversion of the subject and the verb.
If a sentence begins with a negative adverb or an adverb with restrictive meaning,
it must have an inverted word order.
Correct: Never before have I encountered such persistence in a student.
Correct: Seldom do we come across such talent.
Some other adverbs with restrictive meaning that require inversion of the verb and subject are:
hardly ever
hardly... when
in no circumstances
neither/nor
no sooner... than
not only
nowhere