病気だったに違いない。
Sentence Analyzer
English Translation
He must have been ill.
Furigana
Romanji
Byōki datta ni chigainai.
Words
病気
(びょうき)
illness; disease; sickness
だ
(だ)
be; is; indicates past or completed action; indicates light imperative
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
違い
(ちがい)
difference; discrepancy