姉は楽しそうに口笛を吹いていた。
Sentence Analyzer
English Translation
My sister was whistling merrily.
Furigana
Romanji
Ane wa tanoshisō ni kuchibue o fuiteita.
Words
姉
(あね)
older sister; elder sister
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
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
口笛
(くちぶえ)
whistle
を
(を)
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
吹く
(ふく)
to blow (e.g. wind); to play a wind instrument; to emit; to spout; to whistle; to laugh; to burst into laughter; to smelt; to mint; to brag; to talk big