高校では化学と物理を勉強した

N4 高校 koukou high school, senior high school N5 では dewa then, well, in that case N3 化学 kagaku chemistry N3 物理 butsuri physics N5 勉強 benkyou study, learning

N5 高 kou / taka.i, taka, -daka, taka.maru, taka.meru tall, high, expensive N5 校 kou, kyou exam, school, printing N3 化 ka, ke / ba.keru, ba.kasu, fu.keru, ke.suru change, take the form of, influence N5 学 gaku / mana.bu study, learning, science N4 物 butsu, motsu / mono, mono- thing, object, matter N4 理 ri / kotowari logic, arrangement, reason 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

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 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information