课外阅读英语可以用 "extra-curricular reading" 或 "extracurricular English reading" 来表示。这两个词的来源都是由 "extra" 和 "curricular" 拼接而来，"extra" 意为 "额外的"，"curricular" 意为 "课程的"，因此 "extra-curricular" 的意思就是 "额外课程" 或 "课外活动"。

例句：

I enjoy doing extra-curricular reading in my free time.

Extracurricular English reading can help improve your language skills.

Our school offers a variety of extra-curricular activities, including reading clubs and book fairs.