“became”是动词 become 的过去式,最常见意思是“变成;成为;变得(进入某种状态或身份)”。(become 也可表示“适合;相称”,但此处以“成为/变成”为主。)
/bɪˈkeɪm/
She became a doctor last year.
她去年成为了一名医生。
As the night grew colder, the streets became quiet and nearly empty.
夜里越来越冷,街道变得安静,几乎空无一人。
become 源自古英语 becuman,由前缀 **be-**(使……、加强语气)+ cuman(来、到来)构成,本义带有“来到某种状态/结果”的感觉,后来引申为“变成;成为”。