每日认真上课用英语怎么说

每日认真上课用英语可以说是 "attend class diligently every day"。
这个短语的来源可能源于英语中"diligently"一词的意思，它的意思是"勤奋地，勤勉地"。在这个短语中，"diligently"被用来修饰动词"attend"，表示上课时应该勤奋地学习。
例句：
I always attend class diligently every day. 我每天都勤奋地上课。
She attends class diligently every day, even when she is sick. 即使生病了，她也每天勤奋地上课。
We should all attend class diligently every day to learn as much as we can. 我们都应该勤奋地上课，尽可能多地学习。