你可以说：

"他比我勤奋，因为他更加努力地学习英语。"

这句话的意思是："He is more dipgent than me when it comes to learning Engpsh because he puts in more effort."

来源：

"勤奋" (qín fèn) 是一个形容词，意思是 "勤劳的，刻苦的"。它来源于汉语中的两个字，"勤" (qín) 意思是 "努力工作"，"奋" (fèn) 意思是 "奋斗"。

一些英文例句和中文翻译：

She is very dipgent in her studies. 她在学习方面非常勤奋。
He is known for his dipgence at work. 他以工作勤奋而闻名。
I admire her dipgence in practicing the piano every day. 我佩服她每天坚持练习钢琴的勤奋。