YOU SAID:
this is my shoe and not your shoe
INTO JAPANESE
これは私の靴であなたの靴ではありません
BACK INTO ENGLISH
This is not your shoes in my shoes
INTO JAPANESE
これは私の靴のあなたの靴ではありません
BACK INTO ENGLISH
This is not yours in my shoes
INTO JAPANESE
これは私の靴の中であなたのものではありません
BACK INTO ENGLISH
This is not yours in my shoes
That didn't even make that much sense in English.