Questions & Answers about الباب السادس مغلق.
Why do both the noun and the number start with the prefix ال?
In Arabic, ordinal numbers like السادس (sixth) behave exactly like regular adjectives. Since the noun it describes, الباب (the door), is definite and starts with ال (the), the adjective must match it and also take ال.
Why does the number come after the noun instead of before it?
While regular counting numbers can have tricky rules and often come before nouns, ordinal numbers (like first, second, sixth) simply act like normal adjectives. In Arabic, adjectives always come after the noun they describe. So, the phrase is ordered literally as the door the sixth (الباب السادس).
Why doesn't مغلق (closed) have ال (the) as well?
مغلق is the predicate, which is the part of the sentence that gives us new information about the subject. In Arabic equational sentences (sentences that use is or are in English), the subject usually has ال but the predicate does not. If we added ال to make it الباب السادس المغلق, it would just mean the closed sixth door, which is a fragment and not a complete sentence.
Would السادس change if we were talking about a feminine noun instead of a door?