A assembleia de condomínio começa hoje.

Because assembleia is a feminine singular noun.

• a assembleia = the assembly / the meeting
• If the noun were masculine singular, it would use o instead.

In Portuguese, using the definite article is very common, often more common than in English.

The modern Brazilian spelling is assembleia.

Older spelling used assembléia, but after the spelling reform, the accent was removed in words like this. So today, the standard form is:

• assembleia

This is something learners still notice because older texts or older speakers may sometimes use the old spelling.

Not exactly. Assembleia usually sounds more formal and official than reunião.

In this context, assembleia de condomínio suggests a formal residents’ or owners’ meeting, often one where people discuss rules, budgets, maintenance, and sometimes vote on decisions.

So:

• reunião = general meeting
• assembleia = formal assembly, official meeting

In Brazil, condomínio often refers to a residential building or housing complex managed collectively.

Depending on context, it can mean:

• an apartment building with shared administration
• a gated community
• the legal/administrative condominium association

So assembleia de condomínio is the kind of meeting held by residents or owners in that shared property system.

This is a very common question.

de condomínio is a more general label, almost like saying:

• condominium assembly
• condo meeting

It describes the type of assembly.

do condomínio means of the condominium, referring more directly to a specific condominium.

So the difference is roughly:

• assembleia de condomínio = a condo association meeting / the kind of meeting it is
• assembleia do condomínio = the meeting of the condominium, more explicitly tied to a specific one

In real life, both can appear, but assembleia de condomínio is a very common set phrase.

Here, de links two nouns.

English often puts nouns together directly:

• condo meeting
• student card
• coffee cup

Portuguese very often uses de in these cases:

• assembleia de condomínio
• carteira de estudante
• xícara de café

So de can often correspond to English of, but in natural translation it may sound more like a noun modifier.

Because the subject is singular:

• A assembleia de condomínio = one assembly / one meeting

The core noun is assembleia, which is singular, so the verb must also be singular:

• A assembleia começa
• not A assembleia começam

Even though the phrase is a bit long, the subject is still just one event.

In Portuguese, just like in English, the present tense can be used for a scheduled future event, especially when there is a time word like hoje, amanhã, or an exact hour.

So começa hoje can mean:

• it starts today
• it is starting today
• it begins today

This is very natural in Brazilian Portuguese for plans, timetables, and scheduled events.

Yes. A assembleia de condomínio vai começar hoje is also correct.

The difference is mainly style and nuance:

• começa hoje = more direct, often used for schedules or fixed events
• vai começar hoje = also natural, slightly more explicitly future-oriented

Both are common in Brazilian Portuguese.

A good approximation is:

• ah-sem-BLEI-ah

The stress falls on blei.

A few details:

• the s between vowels sounds like a z sound in Brazilian Portuguese
• the ending -eia sounds like -ei-a

So it comes out roughly like ah-zem-BLEI-ah in natural speech.

Começa is pronounced roughly:

• ko-MEH-sa

The ç is called cedilha, and it makes the c sound like s before a, o, or u.

So:

• ca normally sounds like ka
• but ça sounds like sa

That is why começa sounds like ko-MEH-sa, not ko-MEH-ka.

Yes, absolutely.

These are both natural:

• A assembleia de condomínio começa hoje.
• Hoje começa a assembleia de condomínio.

The meaning stays basically the same, but the emphasis changes a little:

• starting with A assembleia... focuses first on the event
• starting with Hoje... emphasizes today

Portuguese allows this kind of flexibility quite naturally.

Yes, and that would be very natural too.

The difference is nuance:

• assembleia de condomínio = more formal, official, often involving decisions or voting
• reunião de condomínio = more general, less formal

If you are talking about the official owners’ or residents’ meeting, assembleia is often the better word.