Po sprzątaniu odkładam mop, miotłę i wiadro do piwnicy.

It means after cleaning or after the cleaning is done.

• po = after
• sprzątaniu = cleaning in the form required after po

So Po sprzątaniu sets the time frame for the action: first the cleaning happens, then the speaker puts the items away.

Because po normally requires the locative case in Polish.

The basic form is:

• sprzątanie = cleaning

But after po, it changes to:

• po sprzątaniu = after cleaning

This is very common:

• po obiedzie = after lunch
• po pracy = after work
• po sprzątaniu = after cleaning

So the ending changes because of grammar, not because the meaning changes.

It is a verbal noun: a noun made from a verb.

• sprzątać = to clean
• sprzątanie = cleaning

English does something similar with words like cleaning, reading, or swimming, which can act like nouns in some contexts.

So in Po sprzątaniu, Polish is using a noun meaning cleaning, not a verb form.

Because Polish usually leaves out subject pronouns when they are clear from the verb form.

• odkładam already means I put back / I am putting away

The ending -am tells you the subject is I.

So:

• odkładam = I put back
• ja odkładam = I put back, but with extra emphasis on I

Adding ja is possible, but not necessary here.

Odkładam means I put away, I put back, or I return to its place.

It is from the verb odkładać, which often suggests putting something somewhere it belongs after using it.

So this is more natural than a simple idea like I place. In this sentence, the sense is:

• after cleaning, I put the mop, broom, and bucket back in the basement

Grammatically, it is present tense: I put back / I am putting away.

But in Polish, the present tense often also expresses a habitual action. So depending on context, this sentence can mean:

• I put the mop, broom, and bucket back in the basement after cleaning
• After cleaning, I am putting the mop, broom, and bucket back in the basement

Without more context, many learners should understand it as a normal repeated or typical action.

Because they are all direct objects of odkładam, so they are in the accusative case. But different noun genders change differently.

Here is what happens:

• mop → mop
  masculine inanimate, so accusative looks like nominative

• miotła → miotłę
  feminine noun, so accusative singular changes -a to -ę

• wiadro → wiadro
  neuter noun, so accusative looks like nominative

So all three are in the accusative, even though only miotła shows an obvious change.

Because do shows movement toward / into a place, while w shows location in a place.

• do piwnicy = to the basement / into the basement
• w piwnicy = in the basement

In this sentence, the speaker is moving the items there, so do is the correct choice.

Because the preposition do requires the genitive case.

The basic form is:

• piwnica = basement / cellar

After do, it becomes:

• do piwnicy = to the basement

This is another very common Polish pattern:

• do domu = to the house / home
• do szkoły = to school
• do piwnicy = to the basement

Not completely. Polish word order is fairly flexible, but the original sentence sounds natural and neutral:

• Po sprzątaniu odkładam mop, miotłę i wiadro do piwnicy.

This order works well because it goes:

1. time expression
2. verb
3. objects
4. destination

You could change the order for emphasis, for example:

• Mop, miotłę i wiadro odkładam po sprzątaniu do piwnicy.
• Do piwnicy odkładam mop, miotłę i wiadro po sprzątaniu.

But those versions shift the emphasis. The original is the best neutral phrasing for most situations.

Yes, you could, but the nuance is a little different.

• Po sprzątaniu = after cleaning / after the cleaning
• Po posprzątaniu = after finishing the cleaning / once I’ve cleaned up

Po posprzątaniu sounds a bit more explicitly completed. Po sprzątaniu is very natural and broad, and it works well in everyday speech.

So the original sentence is perfectly fine, but po posprzątaniu is also possible if you want to stress completion.

Normally, no.

In Polish, a short introductory phrase like Po sprzątaniu usually does not need a comma:

• Po sprzątaniu odkładam mop, miotłę i wiadro do piwnicy.

A comma might appear in special stylistic cases, but in standard everyday writing, no comma is the normal choice here.