父母 / 外出 / 时 / 他 / 和 / 弟弟 / 在家 / 胡作非为 / 把 / 客厅 / 弄得 / 一团糟

父母外出时，他和弟弟在家胡作非为，把客厅弄得一团糟。

While their parents were out, he and his younger brother ran wild at home and made a complete mess of the living room.