YOU SAID:
the man walked over the river
INTO JAPANESE
男は川の上を歩いた
BACK INTO ENGLISH
The man walked on the river
INTO JAPANESE
男は川を歩いた
BACK INTO ENGLISH
The man walked the river
INTO JAPANESE
男は川を歩いた
BACK INTO ENGLISH
The man walked the river
You've done this before, haven't you.