Jutro uczennica z mojej grupy ma ważny sprawdzian z polskiego.

Jutro means tomorrow, and Polish often puts time expressions near the beginning of the sentence.

So:

• Jutro uczennica z mojej grupy ma ważny sprawdzian z polskiego.
• literally: Tomorrow a female student from my group has an important Polish test.

This word order sounds natural because it sets the time first. But Polish word order is flexible, so you could also say:

• Uczennica z mojej grupy ma jutro ważny sprawdzian z polskiego.

That also works, but the emphasis is slightly different.

Uczennica means female pupil / schoolgirl / female student, depending on context.

It is the feminine form of uczeń.

• uczeń = male pupil/student
• uczennica = female pupil/student

A native English speaker may wonder why this is not studentka. In Polish:

• uczennica is usually used for someone in school
• studentka is usually used for a university student

So uczennica suggests this person is probably in school rather than at university.

Because z here means from, and after z in this meaning, Polish uses the genitive case.

So:

• moja grupa = my group (base form / nominative)
• z mojej grupy = from my group

Both words change:

• moja → mojej
• grupa → grupy

This is a very common pattern in Polish. After many prepositions, the following noun phrase changes form.

In Polish, mieć (to have) is very commonly used to talk about scheduled events, duties, classes, exams, and tests.

So:

• ma sprawdzian = literally has a test
• natural meaning: she has a test / she is taking a test

This is completely normal Polish.

Similar examples:

• Mam jutro egzamin. = I have an exam tomorrow.
• Mamy dziś lekcję. = We have a lesson today.

Because adjectives in Polish must agree with the noun in gender, number, and case.

Here:

• sprawdzian is masculine singular
• it is in the form required after ma here
• so ważny also has to be masculine singular

That is why you get:

• ważny sprawdzian = an important test

If the noun changed, the adjective would change too:

• ważna książka = an important book (feminine)
• ważne zadanie = an important task (neuter)

Sprawdzian usually means a test, quiz, or class assessment, often something given at school to check what students know.

It is not always as formal or large as:

• egzamin = exam
• matura = the final secondary-school exam
• test = also used in Polish, often for a test in a more general sense

So sprawdzian often suggests a school test, especially a regular subject test.

Here z polskiego means in Polish or on Polish as a school subject.

This is a very common school-related pattern in Polish:

• sprawdzian z matematyki = a math test
• egzamin z historii = a history exam
• kartkówka z biologii = a biology quiz

Grammatically, z here means something like in / on / from the subject of, and it takes the genitive case.

So:

• polski = Polish
• z polskiego = in Polish / on Polish

Because after z in this structure, the noun/adjective goes into the genitive case.

The school subject is often named with an adjective used like a noun:

• polski = Polish (the subject, base form)
• z polskiego = of/from Polish → Polish test

This is similar to:

• angielski → z angielskiego
• niemiecki → z niemieckiego

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

Not in the same way.

• z mojej grupy = from my group
• w mojej grupie = in my group

In this sentence, uczennica z mojej grupy means a female student from my group. It identifies which student.

If you said uczennica w mojej grupie, it would sound more like a student in my group, which is possible in some contexts, but z mojej grupy is more natural for from my group.

It is in the accusative case, because it is the direct object of ma.

She has what?
→ sprawdzian

For masculine inanimate nouns like sprawdzian, the accusative singular looks the same as the nominative singular.

So:

• nominative: sprawdzian
• accusative: sprawdzian

That is why the form does not visibly change.

No. Polish does not have articles like English a/an/the.

So ważny sprawdzian can mean:

• an important test
• the important test

Which one is meant depends on context.

In this sentence, English would most naturally use an important test, but Polish does not need a separate word for that.

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

The original sentence:

• Jutro uczennica z mojej grupy ma ważny sprawdzian z polskiego.

Possible alternative:

• Uczennica z mojej grupy ma jutro ważny sprawdzian z polskiego.
• Ważny sprawdzian z polskiego ma jutro uczennica z mojej grupy.

These versions are all grammatical, but they shift the emphasis:

• starting with Jutro emphasizes when
• starting with uczennica z mojej grupy emphasizes who
• starting with ważny sprawdzian z polskiego emphasizes what

You would change the gendered noun:

• Jutro uczeń z mojej grupy ma ważny sprawdzian z polskiego.

Here:

• uczennica → uczeń

The rest stays the same because:

• uczeń is still singular
• sprawdzian is still masculine singular
• ważny still agrees with sprawdzian, not with uczeń

So the adjective ważny does not change here.

A rough pronunciation guide is:

YOO-troh oo-CHEN-nee-tsa z MO-yei GROO-pih ma VAZH-nih SPFRAHV-jan z pohl-SKYEH-goh

A few useful pronunciation notes:

• cz sounds like ch in chocolate
• ń is a soft n
• sz sounds like sh
• ł sounds like English w
• j sounds like English y
• rz/ż usually sound like zh as in measure

The hardest cluster for many learners is sprawdzian, especially wdz in the middle.