La reparación empieza mañana.

Because reparación is a feminine noun in Spanish, so it takes the feminine definite article la.

A very common pattern is that nouns ending in -ción are feminine:

• la reparación
• la estación
• la situación
• la conversación

So the article has to agree with the noun:

• la reparación empieza
• not el reparación empieza

The accent mark shows which syllable is stressed.

So reparación is stressed on the last syllable:

• re-pa-ra-CIÓN

Without the written accent, Spanish stress rules would suggest a different stress pattern, so the accent is necessary.

It is also a good clue that this word is related to many other -ción words, which often correspond to English -tion words:

• reparación → repair / reparation
• información → information
• organización → organization

Because empezar is a stem-changing verb in the present tense.

The e in the stem changes to ie in most present-tense forms:

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

So in La reparación empieza mañana, the subject is la reparación, which is third person singular, so the correct verb form is empieza.

Because Spanish often uses the present tense to talk about the near future, especially when there is a clear time expression like mañana.

So:

• La reparación empieza mañana = the repair starts tomorrow

This is very natural in Spanish, just like in English when we say:

• The repair starts tomorrow
• My train leaves at 8

Spanish could also use a future form in some contexts, but the present is extremely common here.

Spanish usually does not need subject pronouns when the subject is already clear.

In this sentence, the subject is explicitly stated:

• La reparación

So there is no need to add a pronoun.

Spanish commonly prefers:

• La reparación empieza mañana

rather than something redundant like:

• La reparación ella empieza mañana — this is not correct here

Since the noun itself is present, that already tells us what is doing the action.

Yes. La reparación is the subject, and empieza is the verb.

A good way to see this is to ask:

• What starts tomorrow?
• The repair

So:

• La reparación = subject
• empieza = verb
• mañana = time expression

Yes. Spanish word order is fairly flexible, especially with time expressions like mañana.

These are all possible:

• La reparación empieza mañana.
• Mañana empieza la reparación.
• La reparación mañana empieza. — possible, but less neutral and less common

The most neutral version is the original one:

• La reparación empieza mañana.

If you want to emphasize tomorrow, starting with Mañana is very common:

• Mañana empieza la reparación.

In Spain, empieza is pronounced roughly like:

• em-PYE-tha

Important points:

• ie sounds like a diphthong, something like ye
• z before a is pronounced like the th in think in standard Spain Spanish

So:

• empieza → em-PYE-tha

That is one of the noticeable differences between Spain Spanish and most Latin American varieties, where the z would sound more like s.

The key letter is ñ, which is pronounced like the ny sound in canyon.

So mañana sounds roughly like:

• ma-NYA-na

This is a very important Spanish letter:

• n and ñ are different sounds
• ano and año are completely different words, for example

So be careful to pronounce ñ clearly.

Usually yes, but the exact English translation depends on context.

La reparación can mean:

• the repair
• the fixing
• the repair work

So in this sentence, it could refer to:

• a repair process
• repair work that has been scheduled
• a specific repair job

Spanish often uses a noun like reparación where English might also say:

• the repair
• the repairs
• the repair work

Yes. That is also correct.

• La reparación empieza mañana = the repair starts tomorrow
• La reparación comenzará mañana = the repair will start tomorrow

The version with empieza sounds very natural and everyday. The future tense comenzará or empezará can sound a bit more formal, definite, or written depending on context.

You could also say:

• La reparación empezará mañana
• La reparación comienza mañana

All are correct, but the original sentence is very natural in normal speech.

Both mean starts or begins.

• empieza comes from empezar
• comienza comes from comenzar

In many situations, they are interchangeable:

• La reparación empieza mañana
• La reparación comienza mañana

Sometimes comenzar can sound slightly more formal or written, but in everyday use the difference is often very small.

Because mañana by itself can function as a time adverb meaning tomorrow.

So Spanish simply says:

• empieza mañana

not:

• empieza en mañana — incorrect for this meaning

This is similar to English:

• It starts tomorrow not
• It starts on tomorrow

So mañana works perfectly on its own as a time expression here.