YOU SAID:

She sold seashells by seashore for sure

INTO JAPANESE

彼女は確かに海岸で貝殻を売っていました

BACK INTO ENGLISH

She sure was selling seashells on the beach

INTO JAPANESE

彼女は確かに浜辺で貝殻を売っていた

BACK INTO ENGLISH

She certainly sold seashells on the beach.

INTO JAPANESE

彼女は確かに浜辺で貝殻を売っていました。

BACK INTO ENGLISH

She certainly sold seashells on the beach.