YOU SAID:

this is not a sentence this is just something you've never seen before

INTO JAPANESE

これは文章ではありませんこれはあなたが今まで見たことがないものです

BACK INTO ENGLISH

This is not a sentence This is something you have never seen

INTO JAPANESE

これは文章ではありませんこれはあなたが見たことがないものです

BACK INTO ENGLISH

This is not a sentence This is something you have never seen