YOU SAID:

The rain in Spain rains mostly on the plains.

INTO JAPANESE

スペインの雨は主に平原で雨が降ります。

BACK INTO ENGLISH

It rains mainly on the plains of Spain.

INTO JAPANESE

主にスペインの平原に雨が降っています。

BACK INTO ENGLISH

It is raining mainly on the plains of Spain.

INTO JAPANESE

主にスペインの平原で雨が降っています。

BACK INTO ENGLISH

It is raining mainly on the plains of Spain.