我们在阅读古文时,常常会碰到这样的情况:某词本属甲类词,在一定的条件下按照一定的语言习惯而灵活用作了乙类词,临时具备了乙类词的语法特点,这通常称之为词性的变换或词类活用。这是古代汉语的主要特点之一。这一特点,在钻研小语教材时,还能从一些成语中看得出来。 When we read the classical Chinese, we often encounter such a situation: the word belongs to a type of word, under certain conditions in accordance with certain linguistic habits and flexibility as a B word, temporarily with the class B word grammatical features , Which is often called part-of-speech transformation or part-of-speech. This is one of the main features of ancient Chinese. This feature, in the study of small textbooks, but also can be seen from some idioms.