YOU SAID:

Bob tripped on his on foot and hit his head on the floor

INTO JAPANESE

ボブは足でつまずいて床に頭を打ちました

BACK INTO ENGLISH

Bob stumbled with his foot and hit his head on the floor

INTO JAPANESE

ボブは足でつまずいて床に頭を打ちました

BACK INTO ENGLISH

Bob stumbled with his foot and hit his head on the floor