YOU SAID:
i killed a man and hid the body
INTO JAPANESE
私は人を殺して死体を隠した
BACK INTO ENGLISH
I killed someone and hid the corpse.
INTO JAPANESE
人を殺して死体を隠した。
BACK INTO ENGLISH
He killed someone and hid the body.
INTO JAPANESE
彼は人を殺して死体を隠した。
BACK INTO ENGLISH
He killed people and hid the bodies.
INTO JAPANESE
彼は人を殺し、死体を隠した。
BACK INTO ENGLISH
He killed people and hid the bodies.
That didn't even make that much sense in English.