YOU SAID:
They have happily consumed the children
INTO JAPANESE
彼らは子供たちを幸せに消費しました
BACK INTO ENGLISH
They consumed the children happily
INTO JAPANESE
彼らは子供たちを楽しく食べました
BACK INTO ENGLISH
They ate the kids happily
INTO JAPANESE
彼らは子供たちを楽しく食べました
BACK INTO ENGLISH
They ate the kids happily
That didn't even make that much sense in English.