1、learn by oneself
2、study on one's own
3、teach oneself
词汇解析：
1、learn by oneself
英文发音：[lɜːn baɪ wʌnˈself]
中文释义：自学;自主学习;自学英语
例句：
He is learning English by himself.
他正在自学英语。
2、study on one's own
英文发音： [ˈstʌdi ɒn wʌnz əʊn]
中文释义：自学
例句：
The application of teaching activities of study on one's own and "cooperation-research sdudy" in the teaching practice of
environmental chemistry has taken satisfactory effect.
应用自主学习、合作-研究性等学习活动于教学实践中，取得了令人满意的教学效果。
3、teach oneself
英文发音：[tiːtʃ wʌnˈself]
中文释义：自学
例句：
Thoroughly to teach another is the best way to learn for oneself.
给他人进行透彻的讲解，是自学的最佳途径。
