私たちの先生は高校時代に英語を一生懸命勉強したに違いない。

Sentence Analyzer

English Translation

Our teacher must have studied English hard when he was a high school student.

Furigana

私(わたし)たちの先生(せんせい)は高校(こうこう)時代(じだい)に英語(えいご)を一生懸命(いっしょうけんめい)勉強(べんきょう)したに違(ちが)いない。

Romanji

Watashitachi no sensei wa kōkō jidai ni eigo o isshōkenmei benkyōshita ni chigainai.

Words

私たち (わたしたち、わたくしたち)

we; us

の (の)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

先生 (せんせい、せんじょう)

teacher; master; doctor; with names of teachers, etc. as an honorific; previous existence

は (は)

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

高校 (こうこう)

senior high school; high school

時代 (じだい)

period; epoch; era; age; the times; those days; oldness; ancientness; antiquity; antique; period piece

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

英語 (えいご)

English (language)

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.

一生懸命 (いっしょうけんめい)

very hard; with utmost effort; with all one's might; for dear life

勉強 (べんきょう)

study; diligence; discount; reduction

違い (ちがい)

difference; discrepancy