YOU SAID:

I have been worked to finish study to exams at the recent days

INTO JAPANESE

ここ数日、勉強から試験まで頑張っていました

BACK INTO ENGLISH

I've been working hard these past few days, from studying to exams.

INTO JAPANESE

ここ数日、勉強から試験まで一生懸命頑張ってきました。

BACK INTO ENGLISH

I've been working hard these past few days, from studying to exams.