光看Sometime, Some Time 和 Sometimes這幾個詞，很明顯他們的意思是差不多的，但這些英語單詞的運用是不一樣的。
英語單詞用法：Sometime, Some Time 和 Sometimes的區別 - 中加雅思·留學（sino-ielts.com）
定義
Sometime作副詞時指未來不確定的時間；作形容詞時指偶爾或以前。
Some Time指「一段時間」。
Sometimes（副詞）指「偶爾、有時、時不時」。
具體的英語單詞運用，請參閱下面例句。
Sometime, Some Time 和 Sometimes英語單詞運用例句
例1："He's been talking to just about everybody and wants to talk to you sometime." （他這段時間已經跟幾乎所有人談過話了，希望哪天能跟你談一談。）
例2："Lynne was particularly disappointed because her sometime companion, George Archibald, was not paying much attention to her that evening." （林恩感到特別失望，因為她那個時候的同伴，也就是喬治阿奇博爾德，當晚並沒有太注意到她。）
例3："You must give some time to your fellow men. Even if it's a little thing, do something for others--something for which you get no pay but the privilege of doing it." （你必須給你的同伴一些時間。即使是一件小事，也要為別人做點什麼，比如沒有報酬，但卻只有你有這樣做的特權去做的事情。）
例4："I am so clever that sometimes I don't understand a single word of what I am saying." （我很聰明，有時候我卻不明白自己說的話。）
Sometime, Some Time 和 Sometimes英語單詞運用說明
在這三個單詞中，很容易記住sometimes，意思是「有時」，以一個單詞的形式出現：「My wife and I sometimes play Scrabble.」。但另外兩個就更難些，用法也各不相同。
Some Time中的some不被強調：We'll need some time to consider this. 。如果是指未來一段不確定的時間，也用some time： She arrived some time after dinner.(在這裡有些人也會用sometime，但也沒有錯。)
當指「在未來某個不確定的時間點」時，就用sometime：We'll talk about this sometime next week. 但當sometime是形容詞時，意思就是「偶爾」或「以前」： his sometime colleague
簡單記住Sometime, Some Time 和 Sometimes英語單詞運用的方法
Some Time：中間隔了一個空，指「一段時間」。
Sometimes：時不時（偶爾）會這樣，就是會有幾個這樣的時間點會這樣，因此就有個s（複數形式）
Sometime：既然sometimes已經有偶爾的意思了，我們在這裡就不要去記sometime也有偶爾的意思，記住「未來不確定的時間點」和「以前」即可。
Sometime, Some Time 和 Sometimes英語單詞運用練習
題1："If [Fern] took her doll for a walk in the doll carriage, Wilbur followed along. _____ on these journeys Wilbur would get tired, and Fern would pick him up and put him in the carriage alongside the doll."
題2："For _____ she lay back against the hood, wondering drowsily why she was so tired."
題3："_____ during the night and at the height of the storm the telephone rings, a dreadful summons, and I find myself in the middle of the floor shaking like a leaf and wondering what is amiss."
答案
Sometimes
Some time
sometime