Angry and upset, the teacher told him both to stay after school. 为什么可以直接这么表达他的情绪

问题描述:

Angry and upset, the teacher told him both to stay after school. 为什么可以直接这么表达他的情绪
不用being什么什么吗

Angry and upset 形容词可以做独立状语,如:They finallygot home ,tiredand hungry .=being angry and upset吗