YOU SAID:

I've been praying hard

INTO JAPANESE

一生懸命祈ってきた

BACK INTO ENGLISH

Have been praying so hard

INTO JAPANESE

一生懸命に祈っています。

BACK INTO ENGLISH

I hope to work hard.

INTO JAPANESE

私は懸命に仕事を願っています。

BACK INTO ENGLISH

I hope to work hard.