YOU SAID:

I slapped a horse until it died.

INTO JAPANESE

それは死ぬまで馬がたたいた

BACK INTO ENGLISH

It hit the horse until it died

INTO JAPANESE

それは死ぬまで馬に当たった

BACK INTO ENGLISH

It hit a horse until it died

INTO JAPANESE

それは死ぬまで馬に当たった

BACK INTO ENGLISH

It hit a horse until it died