Po pracy jestem tak zmęczony, że chcę tylko spać.

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Breakdown of Po pracy jestem tak zmęczony, że chcę tylko spać.

• być: to be
• po: after
• praca: the work

Questions & Answers about Po pracy jestem tak zmęczony, że chcę tylko spać.

Why is it po pracy and not po praca?

Because po here requires the locative case.

• praca = work
• locative singular: pracy

So:

• po pracy = after work

This is a very common pattern in Polish:

• po obiedzie = after lunch
• po szkole = after school
• po filmie = after the film

So the form pracy is there because of the preposition po.

Does po pracy mean after work or after working?

In this sentence, po pracy most naturally means after work in the sense of after my work / after the workday.

Polish often uses a noun where English might sometimes prefer a phrase like after working. But here the normal interpretation is simply:

• Po pracy = after work

If you wanted to emphasize the activity of working, Polish might use a different structure, but in everyday speech po pracy is the standard expression.

Why is there jestem? Can Polish really not drop it here?