交通事故が起きた

N4 交通 koutsuu traffic, transportation N4 事故 jiko accident, incident

N3 交 kou / maji.waru, maji.eru, ma.jiru, maji.ru, ma.zaru, ma.zeru, -ka.u, ka.wasu, kawa.su, komogomo mingle, mixing, association N4 通 tsuu, tsu / too.ru, too.ri, -too.ri, -doo.ri, too.su, too.shi, -doo.shi, kayo.u traffic, pass through, avenue N4 事 ji, zu / koto, tsuka.u, tsuka.eru matter, thing, fact N1 故 ko / yue, furu.i, moto happenstance, especially, intentionally N4 起 ki / o.kiru, o.koru, o.kosu, oko.su, ta.tsu rouse, wake up, get up

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences