YOU SAID:

When a horse is a house it tends to eat elephants

INTO JAPANESE

馬が家だと象を食べる傾向がある

BACK INTO ENGLISH

Tend to eat elephants when horses are home

INTO JAPANESE

馬が家にいるときは象を食べる傾向がある

BACK INTO ENGLISH

Horses tend to eat elephants when they are at home

INTO JAPANESE

馬は家にいるとゾウを食べる傾向がある

BACK INTO ENGLISH

Horses tend to eat elephants when they are at home