彼は三時間勉強し続けました

N5 彼 kare he N5 三時間 sanjikan three hours N5 勉強 benkyou study, learning

N3 彼 hi / kare, kano, ka.no he, that, the N5 三 san, zou / mi, mi.tsu, mitsu.tsu three, trois, tres N5 時 ji / toki, -doki time, hour, temps N5 間 kan, ken / aida, ma, ai interval, space, intervalle N4 勉 ben / tsuto.meru exertion, endeavour, encourage N4 強 kyou, gou / tsuyo.i, tsuyo.maru, tsuyo.meru, shi.iru, kowa.i strong, fort, fuerte N3 続 zoku, shoku, kou, kyou / tsuzu.ku, tsuzu.keru, tsugu.nai continue, series, sequel

N4 〜続ける tsuzukeru Indicates continuation of an action over time, attaches to the verb stem, means continue doing N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information