ここで働くことになりました。

N5 ここ koko here

N3 働 dou / hatara.ku work, (kokuji), travailler

N3 〜ことになる koto ni naru Indicates decision result rule or change determined externally, attaches to a verb, means it has been decided that 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 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an 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