彼らはひと月に一度手紙を書いた。

Sentence Analyzer

彼らはひと月に一度手紙を書いた。

English Translation

They wrote a letter to each other once a month.

Furigana

彼(かれ)らはひと月(つき)に一(いち)度(ど)手紙(てがみ)を書(か)いた。

Romanji

Karera wa hitotsuki ni ichi do tegami o kaita.

Words

彼ら (かれら)

they (usually male); them

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

一月 (ひとつき、いちげつ)

one month

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

一 (いち)

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

度 (ど)

degree (angle, temperature, scale, etc.); counter for occurrences and times; strength (of alcohol)

手紙 (てがみ)

letter

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.

書く (かく)

to write; to compose; to pen; to draw; to paint