YOU SAID:

i lost my favourite shoe

INTO JAPANESE

私は好きな靴を失った

BACK INTO ENGLISH

I have lost my favorite shoes

INTO JAPANESE

私は私のお気に入りの靴を失った

BACK INTO ENGLISH

I lost my favorite shoes

INTO JAPANESE

私のお気に入りの靴を失わ

BACK INTO ENGLISH

I lost my favorite shoes