of one's own:属于某人自己的|自己的:
A Room of One's Own:自己的房间|一间自己的房间|一间自己的屋子
of one's own free will:出于自愿
例句:
1、on one's own
He never joins with always plays on his own.
他从不和我们在一起。他总是自己单独玩。
He drew the conclusion by building on his own investigation.
他根据自己的调查研究作出结论。
2、by one's own
He must not measure his neighbour's corn by his own bushel.
他不应该拿自己的标准去衡量邻居。
The story goes that he died by his own hands， but this looks rather suspicious.
谣传他已经自杀，但我对此半信半疑
For ones own: 表示属于某人的
on ones own: 表示独立地（凭自己的力量）
of ones own: 表示某人所有的（属于……某人的）
by ones own: 表示以某人自己的
