重要な郵便物が届いたら連絡してください

N3 重要 juuyou important, essential, significant N3 郵便 yuubin mail, postal service N5 物 mono thing, object N1 届 todoke report, notification, registration N4 連絡 renraku contact, communication, notice N5 てください te kudasai please do

N4 重 juu, chou / e, omo.i, omo.ri, omo.nau, kasa.neru, kasa.naru, omo heavy, important, esteem N3 要 you / i.ru, kaname need, main point, essence N2 郵 yuu mail, stagecoach stop, courrier N3 便 ben, bin / tayo.ri convenience, facility, excrement N4 物 butsu, motsu / mono, mono- thing, object, matter N2 届 kai / todo.keru, -todo.ke, todo.ku deliver, reach, arrive N3 連 ren / tsura.naru, tsura.neru, tsu.reru, -zu.re take along, lead, join N2 絡 raku / kara.mu, kara.maru entwine, coil around, get caught in

N5 〜てください te kudasai Polite request expression, attaches to te-form verb, equivalent to please do N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences