1 sometime,some time與sometimes三個都可以表示時間.它們看起來沒多大區(qū)別,但用法卻各不相同.
sometimes用作副詞,表示“有的時候”,與from time to time 意思相同,可以把它放在句首,句尾或句中.sometimes是頻率副詞,它暗指某動作（在過去、現(xiàn)在或?qū)恚┯袝r候重復(fù).如：
Last year she went to the park sometimes.
Sometimes I get up at six.
I sometimes think you are wrong.
2 sometime 用作副詞.表示某個不確切或不具體的時間,表示“某個時候”,它后面應(yīng)該接一個過去或?qū)淼臅r間.例如：
Tom went back home sometime last month.
We will have a meeting sometime next week.(sometime last year,sometime next month等常修飾非延續(xù)性的謂語)
另外,sometime還可以用作形容詞,表示“以前的”,如：
A sometime student of yours is waiting for you at the gate.
3 some time 表示"一些時間"或“一段時間”,可以用作名詞或副詞短語.例如：
She always spends some time on her English.
It took us some time to water the flowers.
some time表"某一段時間"時,常常修飾延續(xù)性的謂語.如：
She stayed in bed for some time.
I will work in Japan for some time.
4.some times 是名詞詞組,意為“幾次,幾倍”,如：
I met him some times in the street last month.
The factory is some times larger than that one.