Question

at school at the school in school in the school 的差别

我不知道at school at the school in school in the school 哪个对，有的书上是这个有的是那个，这个老师说这个，那个老师说那个，谁帮忙讲一下哪个对，区别呢

Answer 1

at school:adv.在学校, 在上课, 在求学
at the school : 是在学校，但并不一定是学习
in school:adv.在求学
in the school是指在学校里,不一定是学习,也可以是在干其他的事情

at school和in school的区别举例:
at school
a) in the school building: 在学校
I can get some work done while the kids are at school.
b) British English 英式英语，求学 attending a school, rather than being at college or university or having a job:
We've got two children at school, and one at university.

in school
a) in the school building: 在学校
Sandra's not in school today.
b) American English 美式英语，求学 attending a school or university rather than having a job:
Are your boys still in school?

所以两者没区别

at the school与in the school 也无区别.