青云翻译

If I study hard in college, then four years later, I will be able to freely use English.

If I work hard in College, so after four years I will be able to use English freely.

If I study diligently in the university, after then four years I will be able to use English freely.

If I am in the university, to study, then 4 years later, I will be able to move freely in the English language.

If I work hard in College, so after four years I will be able to use English freely.