当時の人々はすでに地球が丸いことを知っていた。

Sentence Analyzer

English Translation

People in those days already knew that the earth is round.

Furigana

当時(とうじ)の人々(ひとびと)はすでに地球(ちきゅう)が丸(まる)いことを知(し)っていた。

Romanji

Tōji no hitobito wa sudeni chikyū ga marui koto o shitteita.

Words

当時 (とうじ)

at that time; in those days

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

人々 (ひとびと、にんにん)

each person; people; men and women; everybody

は (は)

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

既に (すでに、すんでに)

already; too late

地球 (ちきゅう)

the earth; the globe

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

丸い (まるい、まろい)

round; circular; spherical; harmonious; calm

事 (こと、こん)

thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as

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.

知る (しる)

to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern