独自一人用英语有以下两种说法：
1、by oneself，比如"我独自一人"就是by myself。
2、on one's own，比如"我独自一人"就是on my own。
by oneself
1、One is firmly established by oneself.?
卓然自立。
2、The infirmity that felling is so by oneself with need to be depended on!?
感觉自己是那么的虚弱和需要依靠！
3、It's more satisfying to do the job by oneself.?
独自一人做这项工作更让人感到满足。
4、I really hope that can know the languages of all countries by oneself.?
我真希望自己能懂所有国家的语言。
5、Visitors can drive by oneself and have.?
游人可自驾车而上。
on one's own
1、Success in study mainly depends on one's own efforts.?
学习主要靠自己努力。
2、Don't be silly, you must depend on one's own.?
别太傻了，你要靠自己。
3、Most of the shadows of this life are caused by standing on one's own sunshine.?
我们一生中大多数的阴影是因我们自己的阳光所造成的。
4、Reflect on one's own thoughts and feelings.?
深刻地反思自己的思想和感觉。
5、Because be away on official business, the exercise of my ability to adapt is strong, and have good stand on one's own ability and communication ability.?
因为出差，锻炼了我的适应能力比较强，并且有很好的独立自主能力和沟通能力。
“独立”的英文名词是Independence。
解释：
英 [?nd?pend?ns] 美 [?nd?p?nd?ns]?
n.独立，自主;足够维持闭居生活的收入;独立心;自恃
noun
[U]
1
~ (from sb/sth)
(of a country 国家)?freedom from political control by other countries 独立
Cuba gained independence from Spain in 1898.
古巴于1898年脱离西班牙而获得独立。
2
the time when a country gains freedom from political control by another country 独立（之日）
independence celebrations
独立纪念庆典
the first elections since independence
独立之后的第一次选举
3
the freedom to organize your own life, make your own decisions, etc. without needing help from other people 自主；自立
He values his independence.
他珍惜他的独立自主。
a woman's financial independence
妇女在经济上的自立
反义词：?dependence
参考资料
independence.百度翻译[引用时间2018-3-9]
