彼女、中古車を買って自分で修理した

N5 彼女 kanojo she N3 中古 chuuko used, secondhand N5 車 kuruma car N5 自分 jibun oneself, myself, yourself N3 修理 shuuri repair, fixing, maintenance

N4 理 ri / kotowari logic, arrangement, 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 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context