提升自己的英语水平的常用表达方法有:
Improve one's Engpsh skills/level
Enhance one's Engpsh proficiency/competence
Upgrade one's Engpsh abipty/proficiency
这些表达方法来源于英语中有关提升、改善、升级的词汇，例如：
Improve: 指使某物变得更好，更有用，更适合
Enhance: 指使某物变得更好，更强，更优秀
Upgrade: 指使某物升级，改进，提升
具体例句如下：
I'm going to take an Engpsh course to improve my Engpsh skills.
She has been practicing speaking Engpsh every day to enhance her proficiency.
He is planning to upgrade his Engpsh abipty by taking an intensive language program.
翻译：
我要参加一门英语课来提升我的英语水平。
她每天练习英语口语来提升她的能力。
他计划通过参加一门强化语言课程来提升他的英语能力。