如果你想表达一个人正在努力工作，你可以说：

"He is working hard."
"She is putting in a lot of effort."
"They are making a real effort."

你也可以使用动词来表达这个意思，如：

"He is putting in long hours."
"She is really grinding."
"They are putting their all into this project."

这些都是常用的表达方式，可以用来描述一个人正在努力工作的情况。