YOU SAID:

don't beat a dead horse on when when you fall down on the turtle's toenail in the that fell on of your skateboard

INTO JAPANESE

スケートボードに落ちたカメの足の爪に落ちたときに、死んだ馬を殴らないでください

BACK INTO ENGLISH

Don't hit a dead horse when it falls on a turtle's toenail that has fallen on a skateboard

INTO JAPANESE

スケートボードに落ちたカメの足の爪に落ちたときに死んだ馬にぶつからないでください

BACK INTO ENGLISH

Don't hit a dead horse when it falls on a turtle's toenail that has fallen on a skateboard