彼女はピアノを弾いているときがもっとも幸せである。
Sentence Analyzer
English Translation
She is happiest when she is playing the piano.
Furigana
Romanji
Kanojo wa piano o hiiteiru toki ga mottomo shiawase de aru.
Words
彼女
(かのじょ)
she; her; her; girlfriend; sweetheart
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
ピアノ
(ピアノ、ピヤノ)
piano
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.
弾く
(はじく)
to flip; to snap; to flick; to repel; to use (an abacus); to calculate; to strum; to pluck the strings (of a guitar, etc.)
とき
(とき)
regular (stops at every station) Jouetsu-line Shinkansen
が
(が)
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
最も
(もっとも、もとも)
most; extremely
幸せ
(しあわせ、しやわせ)
happiness; good fortune; luck; blessing
だ
(だ)
be; is; indicates past or completed action; indicates light imperative
或
(ある)
a certain ...; some ...