吕叔湘在《近代汉语指代词》(1985年版)中指出:“哪字在以前一直也写做‘那’,五四时期以后,为了要跟去声的指示代词分别,才提倡写作‘哪’。直到现在,还有时仍然写做‘那’。” Lu Shuxiang pointed out in his “Modern Chinese Demonstratives” (1985 edition): "Which word has been written as ’it’ until now, and after the May 4th period, in order to differentiate from the deixis, Until now, there are still sometimes written ’that.’