school后面可以加什么单词?

school life 校园生活school mate 校友，同窗school days 学生时代希望能帮助到你~

school day前要加a吗?

大多数不需要： winter break:I'm going skiing during winter break.我放寒假期间去滑雪. Christmas:It's snowing on Christmas day.圣诞节那天在下雪. weekend:What are you doing next weekend?你下周末打算干什么? school day 前面也不需要：I can't play computer games on school days.我上学时不能打电子游戏. 但是,若是强调某一天时,可以加上冠词： It's a school day tomorrow,I can't stay up too late.明天我还要上学,所以不能睡得太晚. But it'll be the weekend,sure you can have some fun.可是那是在周末,你难道就不能放松一下吗?

at school day 还是on school day?

on school day，例如： 1.On school day, what is the maximum speed through school zones in the city town or villages?在城市内上学日，在穿过校区地带时，最高的时速是多少？ 2.Ironed shirts on a school day.在上学的日子穿熨烫整洁的衬衣。 3.On the school opening day, I rose up very early, earlier than usual, because I was greatly excited to see my new school.开学那一天，我很早起身，比平常时还早，因为我很兴奋的要看看我的新学校。

如果是说在学校的某一天，用：on a school day 如果表达通常的情况，用：on school days