一天当他正在上英语课时他发现校长坐在教室的后面的翻译：One day while he was President of English classes he found sitting in the back of the classroom 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

One day when he was president of an English class he found sitting in the back of the classroom

One day while he was President of English classes he found sitting in the back of the classroom

正在翻译，请等待...

One day, when he was attending an English Course Hours he found behind the principals was sitting in the classroom

One day while he was President of English classes he found sitting in the back of the classroom