El límite de tiempo comienza con la cuenta regresiva.

A natural breakdown is:

• El = the
• límite = limit
• de tiempo = of time / time
• comienza = begins / starts
• con = with
• la cuenta regresiva = the countdown

So the structure is basically:

The time limit begins with the countdown.

A more natural English rendering in context might be:

• The time limit starts when the countdown begins
• The timer starts with the countdown

depending on what the original situation is.

Límite de tiempo is the most direct way to say time limit in Spanish.

It follows a very common Spanish pattern:

• noun + de + noun

Examples:

• límite de velocidad = speed limit
• tarjeta de crédito = credit card
• sala de espera = waiting room

You may sometimes see tiempo límite, but that usually sounds less standard as a general translation of time limit. Límite de tiempo is the safer, more common choice.

Because límite is a masculine noun: el límite.

In Spanish, noun gender is not always predictable from the ending. Words ending in -e can be masculine or feminine, so you usually have to learn the article with the noun:

• el límite
• la clase
• el puente
• la gente

A good habit is to memorize nouns with their article, not by themselves.

Comienza is:

• present tense
• third person singular
• from the verb comenzar = to begin

So it means:

• it begins
• it starts

In this sentence, the subject is el límite de tiempo, which is singular, so the verb must also be singular:

• El límite de tiempo comienza...

Because comenzar is a stem-changing verb.

It changes:

• e → ie

So:

• comenzar
• yo comienzo
• tú comienzas
• él/ella/usted comienza

This is a very common pattern in Spanish. Other verbs do the same thing:

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

So comienza is exactly what you should expect from comenzar in the present tense.

Usually, yes. Comenzar and empezar both mean to begin or to start.

So these are both natural:

• El límite de tiempo comienza con la cuenta regresiva.
• El límite de tiempo empieza con la cuenta regresiva.

In everyday speech, many people use empezar a lot because it feels slightly more common and conversational, but comenzar is also very normal and correct.

Yes, con literally means with, but here it expresses the idea that the time limit starts together with the countdown or at the moment the countdown begins.

So comienza con la cuenta regresiva means something like:

• starts with the countdown
• begins when the countdown starts
• begins along with the countdown

This is a normal use of con in Spanish.

La cuenta regresiva means the countdown.

Literally:

• cuenta = count
• regresiva = backward / reverse

So it is a backward count, which is exactly what a countdown is.

This is a standard and very common expression in Spanish.

Yes. El conteo regresivo is also used in many places and also means the countdown.

So both can work:

• la cuenta regresiva
• el conteo regresivo

In many contexts, cuenta regresiva is especially common and widely understood.

Notice the gender difference:

• la cuenta regresiva
• el conteo regresivo

because cuenta is feminine and conteo is masculine.

Spanish uses definite articles more often than English does.

Here, la points to a specific countdown that the speaker and listener both know about, or to the countdown in that situation.

English often drops the article more easily, but Spanish usually keeps it:

• con la cuenta regresiva
• durante la presentación
• abre la puerta

So even if English might say something like with countdown in a shortened style, Spanish normally wants con la cuenta regresiva.

Because regresiva is an adjective modifying cuenta, and adjectives usually agree in gender and number with the noun they describe.

• cuenta is feminine singular
• so the adjective must also be feminine singular: regresiva

Compare:

• la cuenta regresiva
• el conteo regresivo
• las cuentas regresivas

This agreement is one of the most important patterns in Spanish grammar.

Yes, Spanish word order is somewhat flexible, but the original sentence is the most neutral and straightforward.

Neutral order:

• El límite de tiempo comienza con la cuenta regresiva.

You could also say:

• Con la cuenta regresiva comienza el límite de tiempo.

That version is grammatically correct, but it sounds more marked or literary because it emphasizes con la cuenta regresiva.

For most learners, the original order is the best one to use.

A simple pronunciation guide is:

el LEE-mee-teh deh tee-EM-poh koh-MYEN-sah kohn lah KWEN-tah reh-greh-SEE-vah

A few helpful notes:

• límite has stress on the first syllable: LÍ-mi-te
• comienza has stress on mien: co-MIEN-za
• cuenta begins with cue-, pronounced like kwen
• regresiva has stress on si: re-gre-SI-va

If you want to sound more natural, try to say it in smooth groups:

El límite de tiempo / comienza / con la cuenta regresiva.