古今汉语的声调,变化最大的是入声。古代有平、上、去、入四声,现代普通话已经没有入声,原来的入声字,已分别变为阴、阳、上、去四声。例如:逼鼻笔必击急戟迹扑仆朴瀑叔熟属术上述四组字,古代全属入声,现在已分别归入普通话四声。但古入声字在普通话四声里的分布情况不尽相同:归入去声的最多,约有一半以上;其次是阳平,占三分之一以上;再次是阴平;最少的是上声。 Ancient and modern Chinese tone, the biggest change is the sound. In ancient times, there was a flat, upper, lower and upper quadruple, and modern Mandarin had no sound. The original phonetic characters became the yin, yang and yang. For example: forced nibbling must hit urgently Jihuo Pu Pu Shu Shu familiar genus of the above four groups of words, all ancient sound, and now have been classified as Putonghua four. However, the prevalence of ancient speech in the distribution of the Mandarin in four different: the most divided into the sound, about more than half; followed by Yang Ping, accounting for more than one-third; again Yinping; the least is the sound.