some time與some times不要理解為詞組。
some time 中的time是時間的意思。
some times中的times是次數的意思。
some time： 相當一段時間
例句與用法：
1. After the explosion it was some time before the town resumed its everyday routines.
爆炸後經過相當一段時間，這個城鎮才恢復了正常的生活秩序。
2. After we had haggled for some time, we decided to the bargain, and Jones bought the cloth for50 pence per yard.
我們在價錢上爭論了半天，終於決定，瓊斯以每碼50便士買下了這批布。
3. I'm sorry to trouble you, but I wondered if we could have a word some time.
很遺憾要打擾你一下，我想問問我們什麼時候能聊聊。
4. Everyone should invest some time in community service.
每個人都應該花些時間在社區服務上。
5. It took me some time to digest what I had heard.
我花了一些時間才把聽到的東西弄明白。
6. These ideas have been in circulation for some time.
這些想法已經流行了一段時間。
7. This meat takes some time to brown properly when cooking.
這種肉要花點時間才能煮成恰到好處的褐色。
8. The writer decided to live in the Sahara Desert for some time.
那位作家決定去撒哈拉沙漠住一段日子。
some times 幾次(用法略)。
sometime和sometimes是單詞。
sometime：a. 以前的，某一時間ad. 改天，來日
例句與用法：
1. He is my sometime boss.
他是我從前的上司。
2. I hope to see you again sometime next year.
我希望明年某一時候再見到你。
3. I saw him sometime last summer.
去年夏天的某個時候我曾經見過他。
4. Thomas Atkins, sometime vicar of this parish
託馬斯阿特金斯，本牧區從前的牧師。
5. Phone me some time next week.
下星期什麼時候給我打個電話吧。
6. Let's get together sometime.
有時間我們聚一下吧。
7. I want to look them up sometime.
我希望能去拜訪他們。
8. It is reported that the car accident took place sometime yesterday.
據報導，那場車禍是在昨天某個時候發生的。
sometimes：ad. 有時
例句與用法：
1. Sometimes the patient cried for the pain.
有時這個病人疼得哭起來。
2. Sometimes I go by car.
有時我坐汽車去。
3. Sometimes we went to the beach and at other times we sunbathed on the patio.
我們有時去海灘，有時在院子裡做日光浴。
4. He sometimes writes to me.
他間或給我寫寫信。
5. The vowels in the English alphabet are a,e,i,o,u, and, sometimes, y.
英語的元音字母有a，e，i，o，u，有時也包括y。
6. Love is sometimes put in range with a career.
人們往往認為愛情和事業是並駕齊驅的。
7. Mr. Smith sometimes condescends to help his wife with the housework.
史密斯先生有時屈尊幫他的妻子做家務。
8. Good student as he is (=Though he is a good student), he sometimes makes mistakes.
雖然他是好學生，偶而也會犯錯。