"更加努力"在英文中可以说成 "try harder" 或 "put in more effort"。
"Try harder" 是一个短语，意思是"加倍努力"，常用于鼓励或提醒别人不要放弃，应该再加把劲。
"Put in more effort" 是一个短语，意思是"加大努力"，常用于提醒别人需要更加努力才能完成任务。
例句：
"You need to try harder if you want to pass the test."
"你需要加倍努力才能通过考试。"
"If you want to improve your Engpsh, you'll have to put in more effort."
"如果你想提高你的英语，你需要加大努力。"