所谓“音便”,作为日语语法专用术语,系指为发音的方便而在单词或词组中所发生的变化,如:「」→「」;「」→「」;「」→「」;「」→「」等现象,一般可分为:「」音便、促音便、拨音便、「」音便这四种。本文仅针对在标准的东京语调中“「」行五段动词”中的特殊「」音便进行探讨,不涉及形容词的「」音便。具体说来,五段动词在后接助词「」「」「」或助动词「」「」 The so-called “tone of sound”, as a special term of Japanese grammar, refers to the change that occurs in a word or phrase for convenience of pronunciation, such as: “” → “”; “” → “”; “” → “ ”→“ ”and other phenomena can generally be divided into:“ ”sound of sound, promote sound, dial sound,“ ”sound of these four. This article examines only the special “” sounds in the “five” verbs of “” in the standard Tokyo tone, and does not address the “” sounds of adjectives. Specifically, the five-stage verb follows the auxiliary “” “” “” or auxiliary verb “” “”