昨日三時間勉強しました。

N5 昨日 kinou yesterday N5 三時間 sanjikan three hours N5 勉強 benkyou study, learning

N3 昨 saku yesterday, previous, hier N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan 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

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