YOU SAID:
the postman delivered some butterflies
INTO JAPANESE
郵便配達員は蝶を配達しました
BACK INTO ENGLISH
Postman delivered butterfly
INTO JAPANESE
郵便配達員が蝶を配達
BACK INTO ENGLISH
Postman delivers butterfly
INTO JAPANESE
郵便配達員が蝶を届ける
BACK INTO ENGLISH
Postman delivers butterfly
That didn't even make that much sense in English.