寒いので窓を閉めてください。

N5 寒い samui cold N5 窓 mado window N5 てください te kudasai please do

N3 寒 kan / samu.i cold, froid (temps), frío N3 窓 sou, su / mado, tenmado, kemudashi window, pane, fenêtre N3 閉 hei / to.jiru, to.zasu, shi.meru, shi.maru, ta.teru closed, shut, fermer

N5 〜てください te kudasai Polite request expression, attaches to te-form verb, equivalent to please do N4 〜ので node Indicates cause or reason in a softer way than kara, connects two clauses, often used in polite explanations 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 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase