No he de signar res avui; només he de confirmar l'adreça i el número.

He de means I have to or I need to here.

It is formed with:

• he = I have / first-person singular of haver
• de
• an infinitive: signar, confirmar

So:

• he de signar = I have to sign
• he de confirmar = I have to confirm

This construction is haver de + infinitive, which is a very common way to express obligation in Catalan.

A few other forms are:

• has de = you have to
• ha de = he/she has to
• hem de = we have to
• heu de = you all have to
• han de = they have to

You may also hear haig de for I have to in some spoken Catalan, but he de is fully correct and very common.

Yes, it is the same verb: haver.

But it is doing a different job:

• he signat = I have signed
  Here he is an auxiliary forming the present perfect.
• he de signar = I have to sign
  Here he de is part of the obligation structure.

So the form is the same, but the grammar is different:

• haver + past participle → perfect tense
• haver de + infinitive → obligation / necessity

Because Catalan often drops subject pronouns when they are not needed.

The verb form already tells you who the subject is:

• he = I

So No he de signar res avui already clearly means I don’t have to sign anything today.

You could say Jo no he de signar res avui, but that would usually add emphasis or contrast, something like:

• Jo no he de signar res avui; tu sí.
  I don’t have to sign anything today; you do.

In Catalan, res often works with no in negative sentences:

• No he de signar res = I don’t have to sign anything / I have to sign nothing

This is normal Catalan structure. Literally, it is something like not ... anything, but in English the natural translation is usually nothing or anything, depending on the sentence.

Compare:

• Veig alguna cosa = I see something
• No veig res = I see nothing / I don’t see anything

So in negative sentences, res is the usual word for anything / nothing.

Good question: this can depend on context.

In this sentence, it clearly means:

• I don’t have to sign anything

Why? Because the second half says:

• només he de confirmar l'adreça i el número
  I only have to confirm the address and the number

So the idea is about what tasks are required, not about prohibition.

In other contexts, a negative with haver de can sometimes feel closer to must not or should not, especially if the speaker is giving instructions. But here the meaning is clearly lack of necessity.

Yes, Catalan can sometimes omit repeated material, and només confirmar l'adreça i el número would be understandable in context.

But repeating he de is very natural because it makes the structure clear and balanced:

• No he de signar res avui; només he de confirmar l'adreça i el número.

This gives a neat contrast:

• not this
• only that

So the repetition is not required every time, but it sounds complete and clear.

The accent in només shows the correct stress.

It is pronounced with the stress on the last syllable:

• no-MÉS

In Catalan spelling, accent marks often show where the stress goes and sometimes also what kind of vowel is used.

So només means only / just, and the accent helps you pronounce it correctly.

L' is the shortened form of the article la before a vowel.

So:

• la adreça → l'adreça

This is very common in Catalan:

• l'escola
• l'oficina
• l'hora

As for ç, it sounds like s.

So adreça is pronounced with an s sound at the end, not a k sound.

That is one of the jobs of ç in Catalan: it keeps the s sound before a, o, or u.

Número is a masculine noun, so it takes el:

• el número

The accent mark shows that the stress falls on the first syllable:

• NÚ-me-ro

Without the accent, you would expect a different stress pattern.

Also, Catalan sometimes distinguishes between:

• nombre = number in the mathematical sense
• número = numeral, issue number, house number, phone number, etc.

In everyday speech, número is very common, and in a sentence with adreça, it sounds completely natural.

Yes. Catalan word order is flexible.

The original sentence:

• No he de signar res avui

is perfectly natural.

But you could also say:

• Avui no he de signar res
• No he de signar avui res — possible, but less natural
• No he de signar res, avui — more marked, often for emphasis

The most neutral options are:

• No he de signar res avui
• Avui no he de signar res

The semicolon links two closely related parts:

• No he de signar res avui
• només he de confirmar l'adreça i el número

It shows a strong connection, but also a pause stronger than a comma.

So the semicolon works well because the second clause contrasts with the first:

• not sign anything
• only confirm the address and number

A comma would also be possible in more casual writing, and a full stop would also be correct. The semicolon just gives a slightly more careful written style.

No. In Catalan, h is silent.

So he is pronounced without any English-style h sound.

That means you should not say hee with a strong h at the start. Just begin with the vowel sound.

This is true in general in Catalan:

• hora
• home
• he
• havia

all have a silent h.

Yes.

Res basically means nothing / anything, depending on context.

For example:

• No passa res = nothing happens / it’s nothing / no problem
• Què fas? — Res. = What are you doing? — Nothing.

So in your sentence:

• No he de signar res avui

res is the same word. The exact English translation changes a bit because English uses anything and nothing differently depending on the sentence structure.