在上学日通常可以用 "school day" 来表示。这个短语的来源可能源自于每天都有学校上课的常规安排。

例句:

"I have a lot of homework to do on school days."(在上学日我有很多作业要做。)
"I usually wake up early on school days so I have time to eat breakfast and get ready for class."(在上学日我通常会早起,这样我就有时间吃早餐并为上课做好准备。)
"On school days, I have to wear a uniform to school."(在上学日我必须穿校服上学。)

需要注意的是,"school day" 与 "school days" 的用法略有不同。"School day" 表示普通的一天上学,而 "school days" 则指的是某人的学校生涯。例如:

"I miss my school days. Life was so much simpler back then."(我想念我的学校生涯。那时的生活是如此的简单。)
"I can't bepeve it's been 10 years since I graduated from high school. Those were some of the best school days of my pfe."(我简直不敢相信已经10年以前我从高中毕业了。那些是我人生中最好的学校时光。)