Questions & Answers about Czy macie większy pokój?
Why is "bigger" większy when the word for "big" is duży?
The adjective duży (big) has a completely irregular comparative form. Instead of keeping the root and adding a regular ending, the word changes entirely to większy. This is exactly like how "good" changes to "better" or "bad" changes to "worse" in English.
Why doesn't the adjective większy have an accusative ending like -ego here?
The phrase większy pokój is the direct object of the verb mieć (to have), so it is in the accusative case. However, pokój is a masculine inanimate noun. For masculine inanimate nouns, the accusative form looks exactly the same as the basic dictionary (nominative) form, so the adjective stays as większy.
Who is "you" in this sentence, one person or multiple people?
Macie is the plural informal "you" (you all), from the pronoun wy. You would use this if you were talking to multiple people, like the staff at a hotel desk. If you were speaking informally to just one person, you would use masz.
Could I change the word order to Czy macie pokój większy?
While people would understand you, it sounds slightly unnatural. In Polish, descriptive adjectives normally come before the noun they describe (większy pokój), just like in English. Putting the adjective after the noun is mostly used for fixed categories or official names.