之前听过吗英语怎么说

之前是指过去的时间。在英语中，可以使用 "before" 或 "previously" 来表示之前。
"Before" 是一个副词，表示在某一时间之前。例如：
I met him before. (我之前见过他。)
She had finished her homework before I came home. (我回家之前她已经完成了作业。)
"Previously" 是一个副词，表示在之前或过去。例如:
She had previously worked as an editor. (她之前曾做过编辑。)
The company has previously issued a statement regarding the matter. (公司之前已经发表过关于此事的声明。)
这个词的来源是由before和pre构成，"before" 来自中古英语 "beforan"，"pre" 来自拉丁语 "prae"，都有“在之前”的意思。