YOU SAID:

sally sat by the shore selling sea shells

INTO JAPANESE

サリーは海岸のそばに座って貝殻を売っていた

BACK INTO ENGLISH

Sally was sitting by the shore selling seashells.

INTO JAPANESE

サリーは海岸のそばに座って貝殻を売っていました。

BACK INTO ENGLISH

Sally was sitting by the shore selling seashells.