声调

汉语中的变调规则 Tone Sandhi Rules in Chinese
(Learn Mandarin Tone Changes)

1. 汉字“一”的变调 1. The tone sandhi of the Chinese character “一”

规则#1：当单念或在词组末尾时，“一”字念原调(第1声)。 Rule #1: When pronounced alone or at the end of a phrase, “一” is pronounced in the original tone (first tone).
例词：一；第一；专一。 yī, èr, sān; dì yī; zhuān yī. Examples: one; first; concentrated.

规则#2：在第4声的汉字前，“一”字变为第2声。 Rule #2: Before the Chinese character in the 4th tone, the character “一” becomes the 2nd tone.
例词：一定；一次。 yí dìng; yí cì. Examples: certainly; once.

sì shēng diào xué hàn yǔ, 四声调学汉语, Learn Chinese with Four Tones。
例字：
bā, 八, eight。
bá, 拔, pull。
bǎ, 把, put。
bà, 爸, dad。

声调不仅在现代汉语占有极重要的地位，就连在古音中也一样，古时汉语的声调有多少类，自来言人人殊，纷纭无定。中国传统音韵学上一向所谓的“四声”，都是声调分为把声调分为“平”、“上”、“去”、“入”四类，这情形至少在五世纪前就已经存在。

Tones play a very important role not only in modern Chinese, but also in ancient Chinese. There are many different kinds of tones in ancient Chinese. The so-called “four tones” in traditional Chinese phonology are divided into four types of tones: “ping”, “shang”, “go”, and “ent”. This situation has existed at least before the fifth century.