努力认真学英语怎么说

"努力认真学英语" 可以用 "study English diligently and earnestly" 来表达。
"Diligently" 指尽力地、勤勉地，来源于拉丁文 "diligentia"，意思是 "careful and persistent effort"。
"Earnestly" 指认真地、诚恳地，来源于古英语 "eornost"，意思是 "seriousness and intensity of purpose or belief"。
下面是一些例句：
I'm going to study English diligently and earnestly so that I can pass the exam.
She always studies English diligently and earnestly, and that's why she's making so much progress.
If you want to improve your English, you have to study it diligently and earnestly.
翻译如下：
我要努力认真学英语，这样我就能通过考试。
她总是努力认真学英语，所以她的进步很大。
如果你想提高英语水平，就必须努力认真学习。