YOU SAID:

And they were roomates.

INTO JAPANESE

そして彼らは部屋にいました。

BACK INTO ENGLISH

And they were in the room.

INTO JAPANESE

彼らは部屋にいた。

BACK INTO ENGLISH

They were in the room.

INTO JAPANESE

彼らは部屋にいた。

BACK INTO ENGLISH

They were in the room.