YOU SAID:
I found a dead boy in the river beside my mother's house.
INTO JAPANESE
母の家の横の川で死んだ男の子を見つけました。
BACK INTO ENGLISH
I found a dead boy in the river next to my mother's house.
INTO JAPANESE
母の家の隣の川で死んだ男の子を見つけました。
BACK INTO ENGLISH
I found a dead boy in the river next to my mother's house.
That didn't even make that much sense in English.