one 可以代替人,表示"人"或者"壹個人",它的所有格是 ones.
one 也可以用來代替上文出現過的名詞,它的復數形式是 ones.但 one 不可用來替代不可數名詞(即物質或抽象名詞).
one's是某人的……後跟名,是名詞所有格 ，如One's laptop doesn't necessarily more expensive than one's computer.壹個人的筆記本不壹定比他的臺式機貴。
ones'用的很少，可以忽略掉
[例句] Mr Zhang gave the textbooks to all the pupils except the ones who had already taken them.
張先生給沒有領到教科書的孩子們每人發了壹本.
Even if they are on sale, these refrigerators are equal in price to, if not more expensive than, the ones at the other store.
即使削價銷售, 這些冰箱如果不比其它商店賣的貴, 也會與它們的價格壹樣.
I had to buy a new pair of shoes since the ones I'd been wearing were worn out already.
我該買雙新鞋了,以前的那雙被我穿破了.