予定より早く終わりました。

N4 予定 yotei plan, schedule, arrangement N5 より yori than N5 早く hayaku early / quickly N4 終わり owari end, finish, conclusion

N3 予 yo, sha / arakaji.me beforehand, previous, myself N3 定 tei, jou / sada.meru, sada.maru, sada.ka determine, fix, establish N4 早 sou, satsu / haya.i, haya, haya-, haya.maru, haya.meru, sa- early, fast, tôt N4 終 shuu / o.waru, -o.waru, owa.ru, o.eru, tsui, tsui.ni end, finish, finir

N4 〜終わる owaru Indicates complete completion of an action, attaches to the verb stem, means finish doing N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜予定 yotei Indicates scheduled future plan decided beforehand, equivalent to be scheduled to do N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜よ yo Sentence ending particle adding information to listener, emphasizes statement, expresses certainty or warning