金属が酸化して色が変わった

N3 金属 kinzoku metal, metallic material N3 酸化 sanka oxidation N5 色 iro color N4 変 hen strange, odd, weird

N5 金 kin, kon, gon / kane, kana-, -gane gold, or, oro N1 属 zoku, shoku / sakan, tsuku, yakara belong, genus, subordinate official N1 酸 san / su.i acid, bitterness, sour N3 化 ka, ke / ba.keru, ba.kasu, fu.keru, ke.suru change, take the form of, influence N4 色 shoku, shiki / iro color, couleur, color N3 変 hen / ka.waru, ka.wari, ka.eru unusual, change, strange

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences