Nauczycielka przygotowała dziewiętnaście pytań do krótkiego testu.

Nauczycielka is the feminine form of nauczyciel (teacher).

• nauczyciel = male teacher, or sometimes a general dictionary form
• nauczycielka = female teacher

Since the subject is a woman, Polish uses nauczycielka.

In this sentence, nauczycielka is in the nominative singular, because it is the subject of the sentence.

In the Polish past tense, the verb agrees with the gender of the subject.

• przygotował = he prepared
• przygotowała = she prepared
• przygotowało = it prepared (neuter)

Because nauczycielka is feminine, the verb is przygotowała.

So the ending -ła is a very common sign of a feminine singular past tense form.

The dictionary form is przygotować, which means to prepare.

So:

• przygotować = infinitive
• przygotowała = she prepared

This verb is also perfective, which means it presents the action as completed.
So przygotowała suggests that the teacher finished preparing the questions.

A related imperfective verb is przygotowywać / przygotowywała, which would focus more on the process: was preparing / used to prepare.

After numerals 5 and higher, Polish usually puts the counted noun in the genitive plural.

So:

• jedno pytanie = one question
• dwa / trzy / cztery pytania = two / three / four questions
• pięć pytań = five questions
• dziewiętnaście pytań = nineteen questions

The noun pytanie changes like this:

• singular: pytanie
• plural nominative: pytania
• plural genitive: pytań

Because 19 behaves like 5+, the correct form is pytań.

This is a very common thing that confuses learners.

The whole phrase dziewiętnaście pytań functions as the object of przygotowała. But inside that numeral phrase, the noun pytanie appears in the genitive plural because that is the form required after 19.

So grammatically:

• the whole expression = the thing she prepared
• the noun after the numeral = genitive plural because of the numeral rule

This is normal in Polish with many numerals.

Here dziewiętnaście is in the form used for nominative/accusative.

Since the phrase is the direct object of the verb, you can think of it as functioning in the accusative, but with numerals like dziewiętnaście, the visible form often looks the same as the nominative.

So the important thing for learners is:

• dziewiętnaście = numeral form used here
• pytań = genitive plural after the numeral

The singular is pytanie (question).

Its forms are:

• pytanie = singular nominative
• pytania = plural nominative
• pytań = plural genitive

In this sentence, pytań is used because of the numeral dziewiętnaście.

Also note that pytanie is a neuter noun, which is why its singular nominative ends in -e.

Because the preposition do requires the genitive case.

So:

• krótki test = nominative, a short test
• do krótkiego testu = genitive after do

Both words change:

• krótki → krótkiego
• test → testu

This is normal adjective-noun agreement in Polish: the adjective must match the noun in case, number, and gender.

Here do means something like for, for the purpose of, or intended for.

So dziewiętnaście pytań do krótkiego testu means:

• nineteen questions for a short test
• nineteen questions intended for a short test

This is a very natural Polish structure.
You will often see do in expressions like:

• klucz do drzwi = key to/for the door
• pytania do tekstu = questions for the text
• materiały do lekcji = materials for the lesson

So do does not always literally mean just to in the movement sense.

Because the sentence is talking about one short test, not several tests.

So:

• test = singular
• testu = singular genitive

And:

• krótkiego matches testu
• masculine singular
• genitive

If it meant for short tests in the plural, the form would be different.

Very close, yes. Test in Polish usually means a test, quiz, or sometimes an exam-style set of questions, depending on context.

In this sentence, krótki test sounds like a short test or a short quiz.

So the word is easy to recognize, but it is still good to learn its Polish grammar:

• nominative singular: test
• genitive singular: testu

Yes. Polish word order is much more flexible than English word order.

The sentence given is a neutral, natural order:

• Nauczycielka = subject
• przygotowała = verb
• dziewiętnaście pytań = object
• do krótkiego testu = modifying phrase

But other orders are possible, for example:

• Dziewiętnaście pytań do krótkiego testu przygotowała nauczycielka.
• Do krótkiego testu nauczycielka przygotowała dziewiętnaście pytań.

These versions can sound more emphatic or stylistically different.
Polish uses word order more for focus and emphasis than English does.

Often, yes.

Depending on context, krótki test could be:

• a short test
• a quick test
• a quiz

If the meaning has already been given to you, the important grammar point is that do krótkiego testu is the genitive form after do. But in natural English, quiz may sometimes sound better than a literal short test.

Because Polish has no articles like English a / an / the.

So nauczycielka can mean:

• a teacher
• the teacher

and testu can mean:

• a test
• the test

The exact meaning depends on context.

That is completely normal in Polish, and learners have to get used to understanding definiteness from the situation rather than from an article.