set to   (TTS發音)

1. start to do sth. eagerly 積極地做某事

    They set to and cleaned the whole house in two hours. 他們開始打掃屋子，兩個小時就打掃完了。

2. begin arguing or fighting 開始爭吵或打架

    The boys set to and the teacher could hardly separate them. 男孩們打架了，老師簡直無法把他們分開。