是被动句.be seen doing 被看见正在做.
翻译:当老师进来的时候,这两个学生被发现正在斗殴.
The two students(主语) were seen fighting(谓语) when the teacher came in(时间状语从句) .
是被动句.be seen doing 被看见正在做.
翻译:当老师进来的时候,这两个学生被发现正在斗殴.
The two students(主语) were seen fighting(谓语) when the teacher came in(时间状语从句) .