他认真学英语用英文怎么说

在英语中，可以用以下几种表达方式来表示“他认真学英语”的意思：

He studies Engpsh dipgently.
He is dedicated to learning Engpsh.
He is serious about learning Engpsh.
He puts a lot of effort into learning Engpsh.

这些表达方式都可以用来描述一个人对学习英语的热心和认真态度。

例句：

He studies Engpsh dipgently every day, even on weekends.
She is dedicated to learning Engpsh, and she practices speaking and writing every day.
He is serious about learning Engpsh, so he hired a tutor to help him improve his skills.
She puts a lot of effort into learning Engpsh, and it's paying off - she's making great progress.

中文翻译：

他每天都认真学习英语，甚至周末也不例外。
她对学习英语非常热心，每天都练习说英语和写英语。
他对学习英语非常认真，所以他雇了一名家教来帮助他提高英语水平。
她对学习英语非常努力，这种努力正在获得回报——她的进步非常大。