YOU SAID:
she borrowed the book from him many years ago and hasn't yet returned it
INTO JAPANESE
彼女は何年も前に彼から本を借りてきて、それをまだ返さなかった
BACK INTO ENGLISH
She borrowed a book from him a couple of years ago and have not returned it yet
INTO JAPANESE
彼女は数年前に彼から本を借りてきたが、それをまだ返さなかった
BACK INTO ENGLISH
She borrowed a book from him a few years ago, but I have not returned it yet
INTO JAPANESE
彼女は数年前に彼から本を借りましたが、私はまだそれを返していません
BACK INTO ENGLISH
She borrowed a book from him a few years ago, but I have not returned it yet
Come on, you can do better than that.