彼女が郵便受けを開けたら大量の請求書が入ってた

N5 彼女 kanojo she N3 郵便 yuubin mail, postal service N3 大 dai big, large, great N3 量 ryou quantity, amount, volume N3 請求 seikyuu claim, demand, request

N3 彼 hi / kare, kano, ka.no he, that, the N5 女 jo, nyo, nyou / onna, me woman, female, femme N2 郵 yuu mail, stagecoach stop, courrier N3 便 ben, bin / tayo.ri convenience, facility, excrement N3 受 ju / u.keru, -u.ke, u.karu accept, undergo, answer (phone) N4 開 kai / hira.ku, hira.ki, -bira.ki, hira.keru, a.ku, a.keru open, unfold, unseal N5 大 dai, tai / oo-, oo.kii, -oo.ini large, big, grand N2 量 ryou / haka.ru quantity, measure, weight N1 請 sei, shin, shou / ko.u, u.keru solicit, invite, ask

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase