彼女、友人から借りた本をうっかり返し忘れてた

N5 彼女 kanojo she N3 友人 yuujin friend, formal friend N3 借り kari borrowing, debt, obligation N5 本 hon book N3 うっかり ukkari carelessly, inadvertently

N3 彼 hi / kare, kano, ka.no he, that, the N5 女 jo, nyo, nyou / onna, me woman, female, femme N5 友 yuu / tomo friend, ami, amigo N5 人 jin, nin / hito, -ri, -to person, être humain, personne N4 借 shaku / ka.riru borrow, rent, emprunter N5 本 hon / moto book, present, main N3 返 hen / kae.su, -kae.su, kae.ru, -kae.ru return, answer, fade N3 忘 bou / wasu.reru forget, oublier, olvidar

N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options