子供のとき、この公園で遊びました。

N5 子供 kodomo child, children N5 この kono this N5 公園 kouen park N4 遊び asobi play, fun, amusement

N5 子 shi, su, tsu / ko, -ko, ne child, sign of the rat, 11PM-1AM N3 供 kyou, ku, kuu, gu / sona.eru, tomo, -domo submit, offer, present N4 公 kou, ku / ooyake public, prince, official N3 園 en / sono park, garden, yard N3 遊 yuu, yu / aso.bu, aso.basu play, jouer, jugar

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 〜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 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase