Vou pedir ao senhor que embrulhe este livro, a não ser que já não tenha papel bonito.

Vou pedir is the very common near future structure in Portuguese: ir + infinitive.

So:

• Vou pedir = I’m going to ask
• Pedirei = I will ask

Both are possible, but vou pedir sounds more natural and common in everyday speech. A learner will hear this pattern constantly in Portuguese.

Ao senhor means to the gentleman / to you, sir.

In European Portuguese, o senhor is a formal and polite way to address a man. It is often used:

• with strangers
• in shops
• with older people
• in formal situations

So here, the speaker is being polite and formal.

Because the verb pedir here works with an indirect object: you ask something of someone.

The pattern is:

• pedir algo a alguém = to ask someone for something
• pedir a alguém que... = to ask someone to...

So:

• a + o senhor becomes ao senhor

This is just a normal contraction:

• a + o = ao
• a + a = à

Because the structure is:

• pedir a alguém que + verb

It means to ask someone to do something.

So:

• Vou pedir ao senhor que embrulhe este livro
  = I’m going to ask you/sir to wrap this book

The que introduces the action being requested.

Because after pedir ... que, Portuguese normally uses the subjunctive.

So:

• que embrulhe = present subjunctive of embrulhar

This is very common after verbs of request, desire, doubt, emotion, etc.

Compare:

• Quero que venha. = I want him/her/you to come.
• Peço que espere. = I ask that you wait.
• Vou pedir ao senhor que embrulhe este livro. = I’m going to ask you to wrap this book.

So embrulhe is not random — it is required by the grammar of the sentence.

Embrulhar means to wrap.

In this sentence, it means wrapping the book, probably in nice paper, such as gift wrap.

Be aware that embrulhar can have other meanings in other contexts, but here it clearly means to wrap up an item.

Yes.

The speaker says:

• Vou pedir ao senhor que embrulhe este livro

Literally, the idea is:

• I’m going to ask you, sir, that you wrap this book

In natural English:

• I’m going to ask you to wrap this book
• I’m going to ask the gentleman to wrap this book

So o senhor is the person being asked to do the action.

Este means this, usually something close to the speaker.

So:

• este livro = this book

In European Portuguese, the distinction between este, esse, and aquele is often taught as:

• este = this, near me
• esse = that, near you
• aquele = that over there, farther away

In real usage, things can be more flexible, but here este livro is the normal way to say this book.

A não ser que means unless.

So the second part:

• a não ser que já não tenha papel bonito

means:

• unless you no longer have nice paper
• more naturally: unless you don’t have any nice paper left

This expression is very common, and it is important because it usually triggers the subjunctive.

Because a não ser que normally requires the subjunctive.

So:

• tenha = present subjunctive of ter
• tem = present indicative

That is why the sentence says:

• a não ser que já não tenha papel bonito

and not:

• a não ser que já não tem papel bonito

The subjunctive is used because the clause expresses an exception/condition that is not presented as a simple fact.

This is a very common pattern in Portuguese:

• já não often means no longer / not anymore

So:

• já não tenho = I no longer have
• já não há = there isn’t anymore
• já não tenha = (that you) no longer have

In this sentence:

• a não ser que já não tenha papel bonito

the meaning is:

• unless you no longer have nice paper
• or more naturally in English: unless you don’t have any nice paper left

So já não does not usually mean a strange literal already not. Very often it means no longer.

Because papel is being used in a general, uncountable sense here.

• papel bonito = nice paper / pretty paper

Portuguese often leaves out the article with materials or uncountable nouns when speaking generally.

The idea is not:

• the nice paper

but rather:

• any nice paper
• nice wrapping paper

In English, we also often do something similar with uncountable nouns:

• Do you have paper?
• Do you have nice paper?

In context, yes, that is the natural interpretation.

Literally, papel bonito means pretty/nice paper, but because the sentence is about wrapping a book, it clearly refers to nice wrapping paper or gift wrap.

Portuguese does not always need to spell out every detail if the context makes it obvious.

In Portuguese, adjectives usually come after the noun.

So:

• papel bonito = nice paper
• livro interessante = interesting book
• casa grande = big house

Sometimes adjectives can come before the noun, but the normal default position is after it.

Yes. You could also say:

• Vou pedir-lhe que embrulhe este livro.

Here, lhe means to you / to him / to her as an indirect object.

Both are grammatical, but:

• ao senhor is more explicit and formal
• lhe is shorter and more compact

In this sentence, ao senhor fits the polite, customer-to-shopkeeper style very well.

Yes, it is fairly polite and somewhat formal.

Reasons:

• vou pedir sounds courteous
• ao senhor is a formal way to address a man
• the whole structure is indirect and respectful

A less formal version might be something like:

• Pode embrulhar este livro? = Can you wrap this book?

But the given sentence sounds more careful and polite, especially in a shop or service setting.

Because Portuguese normally uses a different structure:

• English: ask someone to do something
• Portuguese: pedir a alguém que faça algo

So where English uses to + infinitive, Portuguese often uses:

• que + subjunctive

This is one of the most important structural differences for English speakers to get used to.

The sentence follows this structure:

• Vou pedir = I’m going to ask
• ao senhor = you, sir / the gentleman
• que embrulhe este livro = to wrap this book
• a não ser que = unless
• já não tenha papel bonito = you no longer have nice paper / you don’t have any nice paper left

So the core pattern is:

• pedir a alguém que + subjunctive
• a não ser que + subjunctive

That makes this sentence a very useful example of two common subjunctive triggers in one sentence.