YOU SAID:

Suddenly Momo ran in the halls.

INTO JAPANESE

突然モモが廊下を走って行きました。

BACK INTO ENGLISH

Suddenly Momo ran down the hallway.

INTO JAPANESE

突然モモが廊下を走っていきました。

BACK INTO ENGLISH

Suddenly, Momo ran down the hallway.

INTO JAPANESE

突然、モモが廊下を走っていきました。

BACK INTO ENGLISH

Suddenly, Momo ran down the hallway.