YOU SAID:
when is a door not a door?
INTO JAPANESE
ドアはドアではないのはいつですか。
BACK INTO ENGLISH
When is the door not a door?
INTO JAPANESE
ドアはドアではありませんか。
BACK INTO ENGLISH
Is not the door a door?
INTO JAPANESE
ドアはドアではないですか?
BACK INTO ENGLISH
Is not the door a door?
Come on, you can do better than that.