Voy a escribir una reseña breve esta noche.

Voy a + infinitive is the very common near future structure in Spanish. It means to be going to do something.

So:

• Voy a escribir = I’m going to write
• Escribiré = I will write

Both are correct, but voy a escribir is often more natural in everyday speech. It can sound a little more immediate or conversational.

It breaks down like this:

• voy = I go / I am going from the verb ir (to go)
• a = a linking preposition used in this future structure
• escribir = to write

Together, voy a escribir literally looks like I go to write, but in real usage it means I’m going to write.

This pattern is extremely common:

• Voy a estudiar = I’m going to study
• Vamos a salir = We’re going to go out
• Va a llover = It’s going to rain

Spanish often drops subject pronouns when they are not needed, because the verb ending already shows who the subject is.

• voy clearly means I am going

So yo voy a escribir... is possible, but yo is usually unnecessary unless you want to:

• add emphasis
• create contrast
• avoid confusion

For example:

• Yo voy a escribir una reseña, pero él va a editarla.

In the original sentence, leaving out yo is completely natural.

Reseña usually means a review or a short written account/summary, depending on context.

Very often, it means a review of something like:

• a book
• a film
• a restaurant
• a product

So una reseña breve is most naturally a short review.

In some contexts, reseña can also mean a brief overview or notice, but review is the most likely meaning here.

Because reseña is a feminine noun in Spanish.

So it takes:

• una reseña
• la reseña
• reseñas breves

This is also why the adjective would need to agree if necessary. In this sentence, breve has the same form for masculine and feminine singular, so you do not see a change.

In Spanish, adjectives often come after the noun, especially when they are simply describing it in a neutral way.

So:

• una reseña breve = a short review

That is the most straightforward, ordinary order.

You can also say:

• una breve reseña

This is also correct, but placing the adjective before the noun can sound a bit more literary, stylistic, or slightly more subjective in tone.

So both are possible, but una reseña breve is very natural.

Spanish usually does not use en with common time expressions like this.

So you say:

• esta noche = tonight
• esta mañana = this morning
• este verano = this summer
• mañana = tomorrow

Using en esta noche would usually sound unnatural here.

So:

• Voy a escribir una reseña breve esta noche is correct.

Yes. In Spain, both can be natural, but they are used slightly differently.

• esta noche = tonight
• hoy por la noche = tonight / later tonight / this evening-night

In many situations they are interchangeable:

• Voy a escribir una reseña breve esta noche.
• Voy a escribir una reseña breve hoy por la noche.

The first one is a bit shorter and more direct.

Because after voy a, the next verb stays in the infinitive.

This is how the structure works:

• voy a escribir
• vas a comer
• vamos a estudiar

You do not conjugate the second verb here.

So not:

• voy a escribo ❌
• voy a escribiendo ❌

But:

• voy a escribir ✅

The given order is very natural:

• Voy a escribir una reseña breve esta noche.

But Spanish word order is somewhat flexible. For example, you could also say:

• Esta noche voy a escribir una reseña breve.

This puts more focus on tonight.

You could even hear:

• Una reseña breve voy a escribir esta noche.

But that sounds more marked or unusual. For a learner, the original order is the safest and most natural.

They refer to different times and ideas:

• voy a escribir = I’m going to write it, I plan to write it soon
• estoy escribiendo = I am writing it right now

So:

• Voy a escribir una reseña breve esta noche = the writing will happen later
• Estoy escribiendo una reseña breve = the writing is already in progress

This is an important distinction in Spanish.

Because ñ is a separate letter/sound in Spanish, not just a decorated n.

It is pronounced like the ny sound in canyon for many English speakers.

So:

• reseña sounds roughly like reh-SEH-nya

The ñ changes the word completely. It is not optional.

Yes, it sounds completely natural in Spain.

Everything in it is standard and common:

• voy a + infinitive for the near future
• reseña for review
• breve for short/brief
• esta noche for tonight

A native speaker in Spain would understand it immediately, and it does not sound strange or overly formal.