atschool与intheschool

1、at school=in school指的是学生在学校上课。

2、in the school=at the school指的是在学校内任职，比如说老师，教导主任等

3、at school也可泛指，而in the school则特指某一所学校。

例句：

①I bet you were good at games when you were at school.

我敢说你上学时体育很棒。

②Should our children be taught to swim at school?

我们的孩子应该在学校学习游泳吗？

③He teaches English in the school all the while.

他一直在这所学校里教英语。

④She plays the flute in the school orchestra.

她在校管弦乐队里吹长笛。