sometime

sometimes, sometime, some time

这一组词都是与时间相关的副词。
sometimes: 是个频度副词，意为“有时”，表示动作发生的不经常性，常与一般现在时或一般过去时连用。

• sometimes i have lunch at school.
  有时我在学校吃午饭。

sometime: 是个副词，意为“某时”，指时间上不确定的某一点，常用于过去时或将来时。

• i saw him sometime in july.
  七月有一天我曾见到过他。

some time: 是个名词短语，意思是“一段时间”，在句中常与for，take等词连用。

• i'll stay here for some time.
  我将在这儿呆一段时间。

形容词 sometime:

1. belonging to some prior time
   同义词：erstwhile, former, old, onetime, quondam

副词 sometime:

1. at some indefinite or unstated time

1. It is reported that the car accident took place sometime yesterday.
   据报导，那场车祸是在昨天某个时候发生的。
2. I want to look them up sometime.
   我希望能去拜访他们。
3. Let's get together sometime.
   有时间我们聚一下吧。
4. I hope to see you again sometime next year.
   我希望明年某一时候再见到你。
5. He is my sometime boss.
   他是我从前的上司。