what class/grade are you in?剧末为什么要跟上in?固定用法?
问题描述：
what class/grade are you in?剧末为什么要跟上in?固定用法?
答
因为特殊疑问句是将特殊疑问词提前.what's yout name?——正过来说是,your name is what,正常的“主系表”结构 what class/grade are you in——