go one's own way   (TTS發音)

go or act as one wants to獨自行動；一意孤行

    It's no use arguing with him，for he will go his own way instead of changing his mind. 和他爭論沒用，因為他將一意孤行，不會改變主意。

    None of this was discussed or communicated to me. He went his own way. 此事根本沒有討論過，也沒有通知過我，他獨斷專行。