YOU SAID:

I can never have too many books on my shelf.

INTO JAPANESE

私の棚には決してたくさんの本を置くことはできない。

BACK INTO ENGLISH

You can never put a lot of books on my shelf.

INTO JAPANESE

あなたは決してたくさんの本を私の棚に置くことはできない。

BACK INTO ENGLISH

You can never put a lot of books on my shelf.