本論文論各世代間對表示「認識」的語氣表達形式「カモシレナイ」、「ミタイダ」容許度上的差異。 說話者在表達感情,感覺的時候,如（1a）（2a）的句子一般單獨使用形容詞是自然的,然而如（1b）（2b）的句子使用「カモシレナイ」、「ミタイダ」則不自然。 (1a) （料理を食べて）おいしい。 (1b) ?（料理を食べて）おいしいかも 。 (2a) （私は）気配りができる人が好き。 (2b) ?（私は）気配りができる人が好きみたい 。 但是,依據筆者所進行的問卷調查的結果,可以看出（1b）（2b）的句子越是年輕的世代容許度就越高。對此,本論文主張造成這樣世代間容許度的差異是由於「視點」不同。

In this paper I will discuss generational differences in the use of the modal form “kamoshirenai” and “mitaida”. It is commonly accepted that the use of adjectives alone, such as in the examples (1a) and (1b) below, are natural. While the use of “kamoshirenai” and “mitaida” in conjunction with adjectives as in the examples (2a) and (2b) are not. (1a) （While eating）Oishii. (1b) ?（While eating）Oishii-kamo . (2a) （Watashi wa）kikubari ga dekiru hito ga suki. (2b) ?（Watashi wa）kikubari ga dekiru hito ga suki-mitai . However, according to a survey conducted by the author, younger generations tended to have a higher degree of tolerance for (1b) and (2b). In this paper I assert this is due to a difference in “point of observation” between generations.