1. In 'run fast', the adverb 'fast' is a postmodifier.
在runfast中，副词fast是后置修饰词。
《牛津词典》
2. The evolutional transformation between the two is unidirectional and permanent. It involves only the transformation from the postmodifier to the premodifier and results in frozen subcategories.
进化性转化具有单向性和恒久性特点，它只由后置修饰语向前置修饰语转化，其结果是产生固化次范畴；
来自互联网
3. The evolutional transformation between the two is unidirectional and permanent. It involves only the transformation from the postmodifier to the premodifier and results in frozen subcategories.
