Badanie techniczne jest jutro.

It is a noun. More specifically, it is a verbal noun formed from badać (to examine / to inspect / to test).

So badanie means something like:

• examination
• inspection
• test

In this sentence, it is the subject: the inspection / examination.

That is a very good question, because in Polish adjectives do usually come before the noun.

However, badanie techniczne is a very common fixed expression, especially in official and practical language. In expressions like this, Polish can put the noun first and the classifying adjective second.

Here techniczne is not just a casual description like an inspection that happens to be technical. It helps form the established term badanie techniczne.

So:

• usual pattern: adjective + noun
• but in some set terms: noun + adjective

This phrase is one of those common set terms.

Because adjectives in Polish must agree with the noun they describe.

The noun badanie is:

• singular
• neuter
• nominative

So the adjective must also be:

• singular
• neuter
• nominative

That gives techniczne.

A rough comparison:

• masculine: techniczny
• feminine: techniczna
• neuter: techniczne

Since badanie is neuter, you need techniczne.

It is in the nominative case.

Why? Because it is the subject of the sentence:

Badanie techniczne jest jutro.
= The technical inspection is tomorrow.

Nothing in this sentence is forcing the phrase into another case. Jutro is just an adverb meaning tomorrow, so the subject stays in the nominative.

Because Polish, like English, often uses the present tense for a scheduled or expected future event.

Compare English:

• The inspection is tomorrow.
• not necessarily The inspection will be tomorrow.

Polish works the same way here:

• Badanie techniczne jest jutro.

This sounds natural for something arranged or fixed in time.

Sometimes you may hear or see that kind of shortened version, especially in:

• casual speech
• text messages
• notes
• headlines

But the full, normal sentence is:

Badanie techniczne jest jutro.

So for standard Polish, especially as a learner, it is best to keep jest.

Because jutro already means tomorrow by itself and functions as an adverb.

So Polish says simply:

• jutro = tomorrow

not:

• w jutro

This is similar to English, where you also just say tomorrow, not on tomorrow.

There is no separate word for the, because Polish does not have articles like English a / an / the.

So badanie techniczne can mean, depending on context:

• a technical inspection
• the technical inspection
• just technical inspection in a general sense

The listener understands which meaning is intended from context.

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

You could say:

• Badanie techniczne jest jutro.
• Jutro jest badanie techniczne.

Both are possible, but the emphasis changes.

A simple way to think about it:

• Badanie techniczne jest jutro: starts with the inspection as the topic
• Jutro jest badanie techniczne: puts more attention on tomorrow

The original sentence is a natural neutral way to say it.

Very often, yes.

In everyday Polish, badanie techniczne commonly refers to the required technical inspection of a car or other vehicle. So many native speakers will understand it that way unless context suggests something else.

Literally, though, it just means technical inspection / technical examination, so the exact meaning depends on context.

A simple learner-friendly approximation is:

• badanie → bah-DAH-nye
• techniczne → tekh-NEECH-neh
• jutro → YOO-troh

A few helpful pronunciation notes:

• ch sounds like the ch in Scottish loch or German Bach
• j sounds like English y
• Polish stress is usually on the second-to-last syllable

So the word stress is:

• baDAnie
• techNICZne
• JUtro