YOU SAID:

My pencil case has no pencils in it, but it has an eraser, but since it has no pencils then I never use my eraser

INTO JAPANESE

筆箱には鉛筆が入っていませんが、消しゴムが付いていますが、鉛筆が入っていないので消しゴムは使いません。

BACK INTO ENGLISH

There is no pencil in the pencil case, but it has an eraser, but I don't use an eraser because it doesn't contain a pencil.

INTO JAPANESE

筆箱には鉛筆は入っていませんが、消しゴムは付いていますが、鉛筆が入っていないので消しゴムは使いません。

BACK INTO ENGLISH

There is no pencil in the pencil case, but it has an eraser, but I don't use an eraser because it doesn't contain a pencil.