za + Accusative

The preposition za with the accusative case is a versatile tool in Polish. It covers several distinct functional areas:

• Future Time Points: It indicates when something will happen relative to the present (e.g., za godzinę - in an hour).
• Exchange and Price: It is the standard way to express how much you paid for something or what you are giving in return.
• Directional Motion: When answering the question Dokąd? (Where to?), it indicates movement to a position behind an object. This contrasts with za + instrumental, which describes being already located behind something. Note that "following" someone or something in motion (e.g., iść za kimś) also uses the instrumental case, not the accusative.
• Substitution: It is used to mean 'instead of' or 'on behalf of' someone else (e.g., zrobię to za ciebie).
• Considering / Treating as: Used with verbs of judgment like uważać za (to consider as), uznać za (to recognize as), mieć za (to take for), or brać / wziąć kogoś za (to mistake/assume someone for).
• Responsibility and Guarantee: It is used with verbs like odpowiadać za (to be responsible for) and ręczyć za (to vouch for).
• Getting Down to a Task: Used with verbs like zabrać się za or wziąć się za (to get down to / to start doing something).
• In Defense of / For the Sake of: It expresses fighting or acting for a cause or country (e.g., walczyć za ojczyznę). Note that expressing support or being "in favor of" something uses za + instrumental instead (e.g., jestem za tym).
• Holding and Grabbing: It is used with verbs like trzymać (to hold) or złapać (to catch), or ciągnąć (to pull), as in ciągnąć za włosy (to pull by the hair), to indicate the part of the body or object being held.
• Gratitude, Blame, and Punishment: It follows verbs like dziękować (to thank), przepraszać (to apologize), winić (to blame), karać (to punish), or wstydzić się za (to be ashamed of) to indicate the reason.
• Toasting: Used when drinking to someone's health or success (e.g., wypić za zdrowie).
• Idiomatic Expressions: A key phrase is wyjść za mąż (to get married), traditionally used of a woman marrying. Mąż here preserves an old accusative form in a fixed expression; it does not mean that za governs nominative. The productive accusative of the noun today is męża, as in Widzę męża (I see my husband).

Important Warning: The constructions tęsknić za (to miss someone/something) and przepadać za (to really like) require the za + instrumental pattern, which is a common trap for English speakers.

Note that even if the sentence is negative, the noun following za stays in the accusative; it does not change to the genitive like a direct object would. Finally, to complete the map of how za divides its cases, note that za with the genitive case is used to refer to eras or time periods (e.g., za moich czasów - in my time, za komuny - during the communist era).