Eu posso repetir o endereço, desde que você tenha paciência para ouvir.

Yes. In Brazilian Portuguese, eu is often optional because the verb form already shows the subject.

• Eu posso repetir o endereço...
• Posso repetir o endereço...

Both are natural. Including eu can add emphasis, clarity, or contrast, such as I can repeat it.

Posso is the 1st person singular form of poder in the present tense.

• poder = to be able to / can
• eu posso = I can

So Eu posso repetir... means I can repeat...

Portuguese often uses definite articles more than English does.

• o endereço = the address

In English, you might sometimes say just address, but in Portuguese, using the article is very common and natural in this kind of sentence.

Repetir is the infinitive verb meaning to repeat.

After posso, Portuguese uses the infinitive:

• posso repetir = I can repeat

This works like English can + base verb:

• I can repeat
• eu posso repetir

Here, desde que means as long as, provided that, or so long as.

It introduces a condition:

• Eu posso repetir o endereço, desde que...
• I can repeat the address, as long as...

This expression is very commonly followed by the subjunctive when it expresses a condition.

Because desde que in this sentence introduces a condition, Portuguese normally uses the subjunctive after it.

• ter = to have
• present subjunctive of ter:
  • eu tenha
  • você/ele/ela tenha
  • nós tenhamos
  • vocês/eles/elas tenham

So:

• desde que você tenha paciência = as long as you have patience

If you said você tem, that would be the indicative, which is not the normal choice here.

Yes. It is literally have patience, but in natural English it often corresponds to:

• be patient
• have the patience

So desde que você tenha paciência means something like:

• as long as you are patient
• provided that you have patience

Portuguese often uses ter paciência where English may prefer be patient.

Para ouvir means to listen or to hear, depending on context. Here it means to listen.

• para = for / to
• ouvir = to hear / to listen

So paciência para ouvir is literally patience to listen.

This structure is very common in Portuguese:

• tempo para estudar = time to study
• dinheiro para viajar = money to travel
• paciência para ouvir = patience to listen

Both ouvir and escutar can often be translated as to hear/listen, and in many contexts they overlap.

In everyday Brazilian Portuguese:

• ouvir is extremely common
• escutar is also correct, but sometimes feels a bit more like listen attentively

Here, para ouvir sounds completely natural. You could also hear para escutar, but ouvir is very common in speech.

In much of Brazil, yes. Você is the most common everyday singular you.

So:

• você tenha paciência = you have patience

Depending on the region, people may also use:

• tu in some areas
• different verb agreement patterns with tu

But for standard modern Brazilian Portuguese learners, você is a very useful default.

With standard grammar, it would become:

• Eu posso repetir o endereço, desde que tu tenhas paciência para ouvir.

Why?

Because tu usually takes the 2nd person singular subjunctive form:

• que tu tenhas

However, in many parts of Brazil, people use tu with forms that look like você grammar in casual speech. That varies a lot by region.

The stress falls on re:

• en-de-RE-ço

A rough English-friendly guide could be:

• en-deh-REH-soo

A few notes:

• ç sounds like s
• the final o in Brazilian Portuguese is often pronounced like a light oo sound
• e and o sounds are not exactly like English, but that stress pattern is the key thing to remember

The comma separates the main clause from the conditional clause.

• Eu posso repetir o endereço = main idea
• desde que você tenha paciência para ouvir = condition

This punctuation is very natural and helps readability. Portuguese often uses commas to separate this kind of added clause, much like English does in many similar sentences.