彼が部屋に忍び込むのに気がついた。

Sentence Analyzer

彼が部屋に忍び込むのに気がついた。

English Translation

I noticed him sneak into the room.

Furigana

彼(かれ)が部屋(へや)に忍(しの)び込(こ)むのに気(き)がついた。

Romanji

Kare ga heya ni shinobikomu no ni kigatsuita.

Words

彼 (かれ)

he; him; his; boyfriend

が (が)

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

部屋 (へや)

room; apartment; flat; pad; chamber; stable

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

忍び込む (しのびこむ)

to creep in; to steal in

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

気がつく (きがつく)

to notice; to become aware; to perceive; to realize; to realise; to be scrupulous; to be attentive; to recover consciousness; to come to oneself