YOU SAID:

A potato came flying in my room

INTO JAPANESE

ジャガイモが私の部屋に飛んで来ました

BACK INTO ENGLISH

Potatoes flew into my room

INTO JAPANESE

ジャガイモが私の部屋に飛び込んできました

BACK INTO ENGLISH

Potato jumped into my room

INTO JAPANESE

ジャガイモが私の部屋に飛び込んだ

BACK INTO ENGLISH

Potato jumped into my room