in the school,in school 与 at school

1。at schooladj。在上学(在求学)例句：How is Jim getting on at school?吉姆的学业有进步吗?Did I see you at school today?我今天是不是在学校见到你了?Is Mr Li at home or at school?李先生在家还是在学校?2。in schooladv。在求学例句：He did very badly in school。他在校表现很差。I studied English in school。我在学校学的是英语专业。3。In the school 在学校（特定已知的）例句。I wonder if he is in the school。我想知道他是否在学校。。It’s in the school bag 。在书包里。。John has the lead in the school play。在学校演出中约翰是主角。你可以体会一下它们的区别。