YOU SAID:

Oh my god they were roomates

INTO JAPANESE

ああ私は彼らが部屋だった

BACK INTO ENGLISH

Oh I thought they were room

INTO JAPANESE

ああ、私は彼らが部屋だったと思った

BACK INTO ENGLISH

Oh, I thought they were a room

INTO JAPANESE

ああ、私は彼らが部屋だと思った

BACK INTO ENGLISH

Oh, I thought they were the rooms

INTO JAPANESE

ああ、私は彼らが部屋だと思った

BACK INTO ENGLISH

Oh, I thought they were the rooms