相同点

  1. sometime, sometimes, some time, some times都表示时间。

不同点

  1. sometime是个时间副词,意为“(过去或将来的)某一时刻,在某个时期”, 多置于句子后半部,也可指“任何时候”,同anytime。当形容词时,sometime则 指“以前的”。例如:

    I met her sometime last year. (我在去年某时遇见她。)
    Come over sometime you feel like it. (你任何时候都可以想来就来。) Cecile was a sometime actress. (塞西尔以前当过演员。)

  2. sometimes是个频率副词,表“有时,偶尔”,近似at times, occasionally, from time to time,可置于句首,可放be动词后,也可以放在 动词前。例如:

    Old people are sometimes forgetful. (老人有时多忘事。)

  3. some time意为“一段时间,一些时间”。例如:

    I took some time to clean up my room. (我花了些时间打扫房间。)

  4. some times意为“几次,几倍”,这里的time意为“次数,倍数”。例如:

    Scientists have warned the risk of tsunami some times. (科学家已数次警告有海啸的危险。)