YOU SAID:

What have you done with my horse?

INTO JAPANESE

あなたは私の馬で何をしましたか？

BACK INTO ENGLISH

What did you do with my horse?

INTO JAPANESE

あなたは私の馬をどうしましたの？

BACK INTO ENGLISH

Did you have do with my horse?

INTO JAPANESE

あなたは私の馬と関係がありますか？

BACK INTO ENGLISH

Do you have a relationship with my horse?

INTO JAPANESE

あなたは私の馬と関係を持っていますか？

BACK INTO ENGLISH

Do you have a relationship with my horse?