参加课外活动用英语怎么说

"Participate in extracurricular activities" 是参加课外活动的英文表达。
这个表达来源于英语中的词组 "extracurricular activities"，"extra-" 表示 "额外的"，"curricular" 指的是 "课程的"，因此 "extracurricular" 可以理解为 "课外的"。
一些英文例句：
"I encourage all students to participate in extracurricular activities."
(我鼓励所有学生参加课外活动。)
"Participating in extracurricular activities can help build leadership skills and enhance personal development."
(参加课外活动有助于培养领导力技能和提高个人发展。)
"Extracurricular activities provide students with opportunities to explore their interests and discover new passions."
(课外活动为学生提供了探索兴趣和发现新爱好的机会。)