如果要用英文说“我来自小学英语”，可以说“I come from elementary school English.”

这个表达的来源是源于英语中“come from”的用法，“come from”表示“来自”，所以“I come from elementary school English”表示“我来自小学英语”。

下面给出一些例句：

I come from elementary school English, but now I'm studying English in high school.

I come from elementary school English, but I've been studying English for many years now.

I come from elementary school English, but I've been practicing speaking English every day.

以上例句的中文翻译如下：

我来自小学英语，但现在我正在上高中英语。

我来自小学英语，但我已经学习英语很多年了。

我来自小学英语，但我一直在练习说英语。