法语介词a的用法很多，它本身没有十分明确的含义，却表示各种复杂的关系。它主要引导状语、名词补语、形容词补语、间接宾语、不定式等，英语中没有一个介词能“全方位”地代替它。因此，在英译时则须按照英语的语法要求而采用相应的译法，或用to、或用at或用in、或用on等等， There are many uses of the French preposition a, which itself does not have a very clear meaning, but that a variety of complex relationships. It mainly guides adverbs, nouns complement, adjective complement, indirect object, infinitive, etc., there is not a preposition in English can “omni-directionally” to replace it. Therefore, the English translation of English grammar must be followed in accordance with the requirements of the corresponding translation, or to, or use at or in, or on and so on,