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Questions & Answers about نافذتكم مغلقة.
What does the ـكم at the end of نافذتكم mean?
It is the attached possessive pronoun for "your" when talking to a group of people (plural). It attaches directly to the noun نافذة (window) to make نافذتكم (your window).
Why is there a regular letter ت in the middle of نافذتكم instead of the usual ة (ta marbuta) at the end of "window"?
The Arabic word for window is نافذة, ending in the special letter ة (ta marbuta). When you attach a pronoun like ـكم to a word that ends with it, the letter must "open up" and be written as a regular ت so it can connect to the pronoun.
Since ـكم means "your" (plural), why is the adjective مغلقة (closed) in the singular form?
In Arabic, an adjective always matches the noun it describes, not the owner of the noun. Because the window (نافذة) is a feminine singular thing, the adjective describing it (مغلقة) must also be feminine singular, even if the window belongs to multiple people.
Where is the word for "is" in this sentence?
Arabic does not use a word for "is" or "are" in simple present-tense sentences like this. You just place the subject (نافذتكم) and the adjective (مغلقة) next to each other, and the "is" is naturally understood.