YOU SAID:

The road goes ever on and on down from the door were it began

INTO JAPANESE

道はドアからどんどん下りて行く

BACK INTO ENGLISH

The road goes down from the door.

INTO JAPANESE

道はドアから下りて行く。

BACK INTO ENGLISH

The road goes down the door.

INTO JAPANESE

道はドアを下ります。

BACK INTO ENGLISH

The road goes down the door.