私は五日間日本語を勉強しました。

N5 私 watashi I N5 五日間 itsukakan five days N5 日本語 nihongo Japanese N5 勉強 benkyou study, learning

N4 私 shi / watakushi, watashi private, I, me N5 五 go / itsu, itsu.tsu five, cinq, cinco N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan N5 間 kan, ken / aida, ma, ai interval, space, intervalle N5 本 hon / moto book, present, main N5 語 go / kata.ru, kata.rau word, speech, language 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 N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information