Hard working 同 Working hard 有分別咩??

hard working 應該寫為 hard-working ，因為佢係 adj.
而 working hard 係一個verb (working) 再加 adj. (hard)

例句：

He is hard-working ( 佢好勤力 )

He is working hard ( 佢正在努力地工作 )

無分別
I should be working hard適合D