With a negative adverb or adverb equivalent in front position, inversion of subject and verb must occur.

当表示否定意义的副词或相当于副词的词语置于句首时，句中主谓需倒装。

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This paper analyses the understanding and the uses of the abstract meanings of the prepositions in three parts:prepositional phrase used as a verb; the function of comparison and negative expression.

英语介词繁多，用法各异，本文就英语介词的抽象意义的理解和用法在三个方面进行分析，认为它既具有动词的功能， 又具有比较“意义和否定”的表达法。

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