人類の歴史を勉強してる

N3 人類 jinrui humanity, humankind N4 歴史 rekishi history N5 勉強 benkyou study, learning

N5 人 jin, nin / hito, -ri, -to person, être humain, personne N3 類 rui / tagu.i sort, kind, variety N2 歴 reki, rekki curriculum, continuation, passage of time N2 史 shi history, chronicle, histoire 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 〜ている te iru Indicates ongoing action, continuous state, repeated habit, or resulting condition depending on context 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 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase