上语文课用英语可以说作 "have a Chinese language lesson" 或 "study Chinese." 这两个说法都表示正在学习汉语。来源方面，"have a Chinese language lesson" 是将汉语作为一门外语来学习，因此用英语来表示；而 "study Chinese" 则指学习汉语这门语言本身，因此也用英语来表示。

下面是一些英文例句：

I have a Chinese language lesson every Monday.

I'm studying Chinese because I want to learn more about the culture.

My teacher is very patient and helpful when I have questions about Chinese grammar.

I'm making good progress in my Chinese studies.