YOU SAID:

Heard it through the grapevine that you have been to a post office

INTO JAPANESE

あなたが郵便局に行ったことがあることをブドウの木を通して聞いた

BACK INTO ENGLISH

I heard through the vines that you have been to the post office

INTO JAPANESE

あなたが郵便局に行ったことがあるとブドウの木を通して聞いた

BACK INTO ENGLISH

I heard through the vines that you have been to the post office