Mam jutro przynieść oryginał i kopię?

Mam + infinitive is a very common Polish pattern meaning something like:

• am I supposed to...
• should I...
• do I have to...

So Mam jutro przynieść oryginał i kopię? is not just a neutral future statement. It suggests obligation, instruction, or expectation.

Compare:

• Przyniosę jutro oryginał i kopię. = I will bring the original and the copy tomorrow.
• Mam jutro przynieść oryginał i kopię? = Am I supposed to bring the original and the copy tomorrow?

Because przynieść is the perfective verb, and here that fits better.

• przynieść = to bring, as a completed one-time action
• przynosić = to be bringing / to bring repeatedly / habitually

In this sentence, the speaker is asking about one specific action tomorrow: bringing the documents once. That is why przynieść is natural.

If you used przynosić, it would sound less natural here unless you meant repeated or ongoing bringing.

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

• mam already means I have / I am supposed to
• so ja is unnecessary

You could say:

• Ja mam jutro przynieść oryginał i kopię?

but that adds emphasis, like:

• I’m the one who is supposed to bring them tomorrow?

In normal speech, just Mam... ? is completely natural.

Because kopia is the dictionary form, but here it is the direct object, so it changes to the accusative case.

• nominative: kopia
• accusative: kopię

The verb przynieść takes a direct object, so copy must be in the accusative.

That is why you get:

• przynieść kopię

not

• przynieść kopia

This is because the two nouns belong to different genders and have different accusative endings.

• oryginał is a masculine inanimate noun
• kopia is a feminine noun

In the singular:

• masculine inanimate nouns usually have the same form in nominative and accusative
• many feminine nouns ending in -a change to -ę in the accusative

So:

• oryginał → oryginał
• kopia → kopię

Yes. In Polish, a yes/no question can often be formed simply by:

• using normal word order
• adding question intonation in speech
• using a question mark in writing

So this is natural:

• Mam jutro przynieść oryginał i kopię?

A slightly more explicit version is:

• Czy mam jutro przynieść oryginał i kopię?

Both are correct.
Adding czy makes the question more clearly marked, especially in writing.

Jutro means tomorrow, and here it tells you when the bringing should happen.

So the sense is:

• Am I supposed to bring the original and the copy tomorrow?

It goes with the action przynieść, not with mam in any special grammatical sense. It simply gives the time of the action.

Yes. Polish word order is fairly flexible, though different orders can sound more natural depending on emphasis.

For example:

• Mam jutro przynieść oryginał i kopię?
• Czy mam jutro przynieść oryginał i kopię?
• Mam przynieść jutro oryginał i kopię?
• Oryginał i kopię mam jutro przynieść?

The basic meaning stays similar, but the focus changes a little.

• Mam jutro przynieść... ? = neutral
• Oryginał i kopię mam jutro przynieść? = emphasis on the original and the copy

Przynieść normally takes its direct object in the accusative case.

That is why you get:

• przynieść oryginał
• przynieść kopię

This is a good verb to remember with the accusative because it works like English bring with a direct object.

It most strongly suggests obligation or instruction.

Mam + infinitive usually means:

• am I supposed to
• do I need to
• should I

So the speaker is probably checking instructions.

It is less like a simple future plan and more like asking for confirmation about what is required.

Yes, very natural.

A person might say this when asking at an office, school, or appointment, for example to confirm what documents to bring.

Two common versions are:

• Mam jutro przynieść oryginał i kopię?
• Czy mam jutro przynieść oryginał i kopię?

The second one may sound slightly clearer or a bit more standard in careful speech, but both are normal.