使用汉语的人深感学习英语之困难，究其原因，与两种语言亲缘关系较远有关。从世界语言谱系分类上看，汉语属汉藏语系，英语属印欧语系，语言产生的土地与发展的历史条件差异很大，两种语言必然各有其不同的特性。扩展就是这种差异特征之一。尽管现代汉语在结构上已经相当扩展 People who use Chinese are deeply concerned with the difficulties of learning English. The reason for this is that they are related to the kinship of the two languages. From the perspective of classification of world linguistic pedigrees, Chinese is a Sino-Tibetan language family, and English is an Indo-European language family. The historical conditions of land and development produced by language are quite different. Both languages ​​have their own different characteristics. Expansion is one of these differences. Although modern Chinese has been considerably expanded in structure