用英语表达“她工作非常辛苦”可以说 She works very hard。
hard在这里是形容词，表示“辛苦的”，very是副词，表示“非常”， She works 是主语，表示“她工作”。
例句：
She works very hard at her job. (她工作非常辛苦)
She's always working hard to improve her skills. (她总是努力工作来提高她的技能)
Despite the long hours, she works hard every day. (尽管工作时间很长，她每天都工作很努力)