在英语中，可以用 "take Engpsh class seriously" 来表示 "认真上英语课" 的意思。

其中，"take" 是动词，意思是 "对某事认真对待，重视"。例如：

I always take my studies seriously. 我总是认真学习。
She takes her work very seriously. 她非常认真工作。

"Engpsh class" 是名词短语，表示 "英语课"。

"Seriously" 是副词，意思是 "认真地，严肃地"。例如：

He speaks seriously when discussing important matters. 在讨论重要事情时，他认真说话。
She looked at him seriously and asked him what was wrong. 她认真地看着他，问他出了什么事。

综上，"take Engpsh class seriously" 就是 "认真上英语课" 的意思。

举几个例子：

You should take your Engpsh class seriously if you want to improve your language skills. 如果你想提高英语水平，你应该认真上英语课。
He always takes his Engpsh class seriously and gets good grades. 他总是认真上英语课，成绩好。
She decided to take her Engpsh class seriously and hired a tutor to help her improve. 她决定认真上英语课，并雇了一个家教帮助她提高。