Empieza la tanda de baile.

Empieza is the 3rd person singular present tense form of empezar: to begin / to start.

The full present-tense pattern is:

• yo empiezo
• tú empiezas
• él / ella / usted empieza
• nosotros empezamos
• vosotros empezáis
• ellos / ellas / ustedes empiezan

It changes from e to ie in most present-tense forms. This is a very common kind of stem change in Spanish:

• empezar → empieza
• pensar → piensa
• cerrar → cierra

So empieza does not mean infinitive to start. It means starts / is starting / begins.

Because the subject is la tanda de baile, which is singular.

The main noun is tanda, and la tanda = the round / session / set. Since that noun is singular, the verb must also be singular:

• Empieza la tanda de baile. = singular subject → empieza
• Empiezan las tandas de baile. = plural subject → empiezan

Even though de baile adds extra information, it does not change the number of the subject.

Spanish often allows the verb to come before the subject, especially when announcing that something is starting or happening.

So both of these are possible:

• Empieza la tanda de baile.
• La tanda de baile empieza.

They mean basically the same thing, but the first version can sound a bit more natural for an announcement, narration, or “here it starts” kind of feeling.

English is usually stricter about word order, but Spanish is more flexible.

No separate pronoun is needed, because the subject is already stated: la tanda de baile.

Spanish often leaves out subject pronouns unless they are needed for emphasis or clarity. In this sentence, the subject is the noun phrase itself:

• Empieza = starts / is starting
• la tanda de baile = the thing that starts

So the sentence is not really she starts or it starts with a missing pronoun. The actual subject is written out.

Tanda is a noun that usually means a round, turn, set, series, or slot, depending on context.

In la tanda de baile, it refers to a dance round, dance set, or period of dancing.

This is one of those words that does not always have one perfect English translation. Its exact nuance depends on the situation:

• in some contexts, tanda can mean a turn
• in others, a series
• here, it suggests a dance session / dance round / set of dances

So a learner should focus less on one fixed translation and more on the idea: a defined stretch or round of dancing is beginning.

De baile means of dancing / for dancing / related to dance, depending on context.

Here it works like a noun complement that tells you what kind of tanda it is:

• tanda = round / set / session
• de baile = of dancing / dance-related

So:

• tanda de baile = dance round / dancing session / set of dances

This is a very common Spanish structure:

• clase de español = Spanish class
• zapatos de deporte = sports shoes
• sala de espera = waiting room

Spanish often uses de + noun where English might use another noun as an adjective.

Because in standard Spanish, a countable singular noun like tanda normally needs a determiner such as el, la, una, esta, etc.

So:

• la tanda de baile = the dance round
• una tanda de baile = a dance round

Without an article, tanda sounds incomplete in this sentence.

That is why Empieza la tanda de baile sounds natural, while Empieza tanda de baile does not.

Yes, and that would be a very natural sentence too, but it means something slightly different.

• Empieza el baile = the dancing starts / the dance begins
• Empieza la tanda de baile = the dance round / dance set begins

El baile refers more generally to the dancing or the dance event.
La tanda de baile sounds more specific, as if there is a particular segment, round, or set within a larger event.

So the choice depends on what exactly is beginning.

It is the simple present, but in Spanish the simple present is often used for things happening right now or just now, especially in announcements or live situations.

So Empieza la tanda de baile can mean:

• The dance round starts
• The dance round is starting
• The dance round begins

All are possible English translations depending on context.

Spanish does not always need a separate progressive form like English does. Even though está empezando exists, empieza is very common and natural here.

A rough pronunciation guide:

• empieza ≈ em-PYE-tha in much of Spain
• empieza ≈ em-PYE-sa in Latin America and some parts of Spain without distinción
• baile ≈ BY-leh

A few helpful notes for Spain Spanish:

• z in empieza is often pronounced like the th in think
• ie in empieza is one syllable group: pie
• ai in baile is a diphthong, so it sounds like bye

Stress:

• em-PIE-za
• BAI-le

Yes, it is grammatical and natural, especially if the context really is a dance round, dance set, or a formally defined part of a dance event.

That said, what sounds most natural always depends on the situation. In everyday speech, people might also say simpler things such as:

• Empieza el baile.
• Ahora empieza el baile.
• Comienza la tanda de baile.

So Empieza la tanda de baile is perfectly fine, but whether it is the most common phrasing depends on what kind of event you are talking about.

Yes. Comienza la tanda de baile is also correct.

Both empezar and comenzar mean to begin / to start. In many situations they are interchangeable.

A few general tendencies:

• empezar is often a bit more everyday and common
• comenzar can sound a little more formal or literary in some contexts

But the difference is not huge. In this sentence, both work well.

Yes, if the context already makes it clear what is starting.

For example:

• Empieza la tanda.

This could be enough if everyone already knows that the topic is dancing.

But if you want to specify exactly what kind of tanda you mean, then de baile helps make it clear:

• Empieza la tanda de baile.

So the longer version is more explicit, while the shorter one relies more on context.