彼女はその約束のことをすっかり忘れてしまったにちがいない。

Sentence Analyzer

English Translation

She must have forgotten all about the promise.

Furigana

彼女(かのじょ)はその約束(やくそく)のことをすっかり忘(わす)れてしまったにちがいない。

Romanji

Kanojo wa sono yakusoku no koto o sukkari wasureteshimatta ni chigainai.

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

其の (その)

that (something or someone distant from the speaker, close to the listener; actions of the listener, or ideas expressed or understood by the listener); the; um...; er...; uh...

約束 (やくそく)

promise; agreement; arrangement; one's word; contract; pact; appointment; engagement; date; convention; rule; destiny; fate

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

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.

すっかり (すっかり)

all; completely; thoroughly

忘れる (わすれる)

to forget; to leave carelessly; to be forgetful of; to forget about; to forget (an article)

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

近い (ちかい)

near; close; short (distance)