sometime/sometimes

sometime /ˈsʌmtaiｍ/ adv. 1. 将来某个时候；过去某个时间：I’ll speak to him about it sometime. 这事以后我会跟他谈。I saw him sometime yesterday. 我昨天什么时候见到过他。 2.一度，从前：He was sometime mayor of this city. 他曾任这个城市的市长。

 sometimes /ˈsʌmtaimz/ adv.不时，有时 (可用于句首、句尾、动词前；助动词、情态动词和be, have之后， 对比或重复使用时可放在动词之后)： Sometimes I have letters from him. (= I have letters from him sometimes. 或 I sometimes have letters from him.) 我有时收到他的来信。 It is sometimes warm and sometimes cold. 天气时暖时冷。He likes sometimes the one and sometimes the other. 他有时喜欢这个，有时喜欢那个。