YOU SAID:
The postman has arrived
INTO JAPANESE
郵便屋さんがやってきた
BACK INTO ENGLISH
Has the postman come
INTO JAPANESE
来る郵便配達します。
BACK INTO ENGLISH
Delivers the mail comes.
INTO JAPANESE
提供メールが来る。
BACK INTO ENGLISH
Mail comes.
INTO JAPANESE
メールが来る。
BACK INTO ENGLISH
Mail comes.
That didn't even make that much sense in English.