甥は夜更かしになれていた。
Sentence Analyzer
English Translation
My nephew was accustomed to sitting up late.
Furigana
Romanji
Oi wa yoru fukashi ni nareteita.
Words
甥
(おい)
nephew
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
夜
(よる、よ)
evening; night
更かす
(ふかす)
to sit up late
に
(に)
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
慣れる
(なれる)
to get used to; to grow accustomed to; to become familiar with; to become skilled in; to become experienced at; to become tame; to become domesticated