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Questions & Answers about Zamkniesz drzwi?
Why does zamkniesz translate to the future "will you close" instead of the present "are you closing"?
The verb zamknąć (to close) is a perfective verb, meaning it describes an action that gets completely finished. You cannot finish an action in the exact present moment, so when you put regular present-tense endings on a perfective verb, it automatically creates the future tense!
How does the dictionary form zamknąć turn into zamkniesz?
Verbs that end in -nąć follow a specific pattern. To make the "you" (singular) form, you drop the -ąć and add -iesz. These are the exact same endings you already know from present-tense verbs, just applied to a perfective stem.
Is the word drzwi singular or plural here?
In Polish, drzwi (door) is always a plural word, similar to how "scissors" or "pants" are always plural in English. Even if you are talking about just one physical door, the grammar behaves as if it is plural.
Drzwi is the direct object being closed. Why didn't its ending change for the Accusative case?
Because drzwi is a plural noun. For plural nouns that do not refer to male people, the Accusative case (used for direct objects) looks exactly the same as the basic dictionary form.
Why is there no Polish word for "you" in this sentence?