YOU SAID:

I have worked so hard for this

INTO JAPANESE

私はそのために一生懸命働いてきました

BACK INTO ENGLISH

I've worked hard for that.

INTO JAPANESE

私はそのために一生懸命働いてきました。

BACK INTO ENGLISH

I have worked hard for that.

INTO JAPANESE

私はそのために一生懸命働いてきました。

BACK INTO ENGLISH

I have worked hard for that.