Some Time, Sometime 和 Sometimes 在语法上都是存在的, 不过在意义上各有不同.

Some Time 是形容词性, 它被用来表述”一定数量的时间”, 经常暗示”很有一段时间”.

He has been studying Aramaic for some time.

意味着这哥们研究亚拉姆语已经很有一段时间了。

当然,也可以用来仅仅描述”一段时间”.

I require another couple of hours to finish this project today. I require some time to finish this project today.

我今天需要一段时间来完成这个工程.

Sometime 是副词词性, 它意味着”未来有一个时间”之类, 英语中也可以用”Someday”来替换.

The cure for cancer will be found sometime I’ll get around to finishing that book sometime later. Give me a call sometime, and we’ll have coffee.

Sometimes 一般用在句尾, 表示某件事情总会有几率发生.

Sometimes, I just don’t understand what that man is saying. English grammar sometimes follows its own rules, and sometimes it doesn’t.

Reference:

Sometime, Sometimes, and Some Time