YOU SAID:

its raining cats and dogs ever since the thumderstorm started

INTO JAPANESE

雷雨が始まって以来、雨が降っている猫と犬

BACK INTO ENGLISH

Cats and dogs that have been raining since thunderstorms began

INTO JAPANESE

雷雨が始まってからずっと雨が降っている猫と犬

BACK INTO ENGLISH

Cats and dogs that have been raining ever since the thunderstorm began

INTO JAPANESE

雷雨が始まって以来ずっと雨が降っている猫と犬

BACK INTO ENGLISH

Cats and dogs that have been raining ever since the thunderstorm began