YOU SAID:
The room is beautiful inside
INTO JAPANESE
部屋は美しい緑
BACK INTO ENGLISH
Room is beautiful.
INTO JAPANESE
部屋は美しいです。
BACK INTO ENGLISH
Room was beautiful.
INTO JAPANESE
部屋はきれいでした。
BACK INTO ENGLISH
The room was clean.
INTO JAPANESE
部屋はきれいだった。
BACK INTO ENGLISH
The room was clean.
Come on, you can do better than that.