当老师进入教室是我正在写作的翻译：When the teacher came into the classroom while I'm writing 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

When the teacher entered the classroom is that I'm writing

When the teacher came into the classroom while I'm writing

When teacher enters the classroom is I is writing

When I was writing into the classroom teacher

When the teacher came into the classroom while I'm writing