本文通过比较,对介词较短语动词的副词虚词容易掌握的原因作了初步分析,并着重讨论了副词虚词在构成短语动词时的四种语法功能,同时对常用的16个副词虚词中的两个 out 和 up 的构词功能作了进一步的阐明,希望能对构成短语动词的副词虚词的语法规律作了一些试探性的研究. This article makes a preliminary analysis of the reasons why adverbs are more likely to be mastered, and focuses on four kinds of grammatical functions in the formation of phrasal verbs. At the same time, two of the 16 commonly used adverbs The functions of word formation of out and up are further clarified, hoping to make some tentative research on the grammatical rules of the words forming the phrase verbs.