YOU SAID:

Had I but known there was a horse, I would have ordered a different onion

INTO JAPANESE

もし私が馬がいることを知っていたら、私は別の玉ねぎを注文したでしょう

BACK INTO ENGLISH

If I knew there was a horse, I would have ordered another onion

INTO JAPANESE

馬がいると知っていたら、別の玉ねぎを注文したでしょう

BACK INTO ENGLISH

If I knew there was a horse, I would have ordered another onion