YOU SAID:

i killed a cow by jumping on it and it danced and sang

INTO JAPANESE

牛に飛び乗って殺し、踊って歌った

BACK INTO ENGLISH

Jumped on a cow, killed, danced and sang

INTO JAPANESE

牛に飛び乗って、殺され、踊り、歌った

BACK INTO ENGLISH

Jumped on a cow, killed, danced and sang