The sign David is forced to wear alienates him, and as a result he becomes slightly paranoid and thinks that someone is always behind him reading the sign and judging him.
请老师分析一下这句话:someone is always behind him reading the sign and judging him.
我的理解:
1 behind him是介词短语作表语,副词always修饰介词短语
2 reading the sign and judging him是现在分词短语作状语吗,someone发出这个动作,为什么不需要逗号分隔呢?还是说reading the sign and judging him才是谓语呢?那always behind him又是什么用法?