回答：struggling作句子宾语so many people的补语；
又如：The teacher found the boy sleeping in class again.
 
而often working harder作伴随状语,又如：
The girls walking along the riverside, talking and laughing. 
 
欢迎提问,谢谢，你给的句子中主语是The girls 和talking and laughing 主谓，而这里主语是I和working harder什么关系呢继续回答：often working harder作so many people struggling的伴随状语，整个句子可以这么理Today, I find so many people struggling, and they often work harder,simply ... 

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