是Tell me why you are late for school还是Tell me why are you late for school

是Tell me why you are late for school还是Tell me why are you late for school

tell 后面加宾语从句用陈述语序
所以是前者Tell me why you are late for school 告诉我你为何迟到了

第一个。非问句形式：疑问词+陈述句

第一个是正确的 Tell me why you are late for school