Cuando llegue el jueves, ya tendré preparada la reseña, revisada la bibliografía y anotadas dos citas del prólogo.

Because cuando is referring to a future event here: when Thursday arrives.

In Spanish, when cuando refers to the future, the verb in that clause normally goes in the present subjunctive:

• Cuando llegue el jueves... = When Thursday arrives...

Compare:

• Cuando llega el jueves, estoy cansado. = When Thursday comes around, I’m tired.
  (habitual / repeated situation)
• Cuando llegue el jueves, ya tendré... = When Thursday arrives, I will already have...
  (specific future moment)

So this is a very common use of the subjunctive after time expressions like cuando, en cuanto, hasta que, etc., when the action is still in the future.

Cuando llegue el jueves literally means when Thursday arrives/comes. It is a natural way in Spanish to refer to a point in time.

Spanish often treats days or times as if they arrive:

• Cuando llegue el verano... = When summer comes
• Cuando llegue tu turno... = When your turn comes

So cuando llegue el jueves is not strange or poetic; it is a normal way to say by the time Thursday comes or when Thursday arrives.

These two forms are related, but they do not mean exactly the same thing.

Tendré preparada

This is:

• future of tener: tendré
• plus a past participle used like an adjective: preparada

It focuses on the resulting state:

• I will have the review ready / prepared

This sounds like the speaker is talking about what will already be done and in a finished state by Thursday.

Habré preparado

This is the future perfect of preparar:

• I will have prepared the review

This focuses more directly on the completed action.

So:

• Ya tendré preparada la reseña = I’ll already have the review ready
• Ya habré preparado la reseña = I’ll already have prepared the review

The sentence you were given emphasizes the idea of having things completed and ready, not just performing the actions.

Because here they behave like adjectival past participles, and they must agree with the nouns they describe.

• la reseña → feminine singular → preparada
• la bibliografía → feminine singular → revisada
• dos citas → feminine plural → anotadas

This is different from the participle used with haber, which does not agree:

• He preparado la reseña.
• He revisado la bibliografía.
• He anotado dos citas.

But with tener + participle in this kind of structure, agreement is normal:

• Tengo preparadas las maletas.
• Tendré revisado el informe.
• Tenía escritas varias notas.

It is a very common Spanish pattern:

tener + object + past participle

Here:

• tendré = I will have
• la reseña = the object
• preparada = a participle describing the object’s completed state

So the structure means something like:

• I will have the review prepared/ready
• I will have the review done

It is similar to English patterns like:

• I’ll have the report finished by tomorrow.
• She had the room cleaned before the guests arrived.

Spanish uses this structure a lot to talk about something that will be already completed and available.

It can be.

Both are possible:

• Tendré preparada la reseña
• Tendré la reseña preparada

In this sentence, putting the participle before the noun helps create a neat parallel series:

• preparada la reseña
• revisada la bibliografía
• anotadas dos citas del prólogo

This word order sounds a bit more elegant and organized, especially in writing.

So the sentence is not using a completely different grammar; it is just choosing a stylistic word order that works well in a list.

Because tendré applies to all three items in the series.

The full idea is:

• ya tendré preparada la reseña
• (ya tendré) revisada la bibliografía
• (ya tendré) anotadas dos citas del prólogo

Spanish often avoids repeating the same verb when the meaning is clear. This makes the sentence more compact and natural.

So the structure is basically:

• I’ll already have the review prepared, the bibliography checked, and two quotations from the prologue noted down.

Ya adds the idea of already.

So:

• Cuando llegue el jueves, tendré... = When Thursday arrives, I will have...
• Cuando llegue el jueves, ya tendré... = When Thursday arrives, I will already have...

It emphasizes that by that future time, the tasks will already be done.

In planning or deadlines, ya is very common because it highlights completion before a certain point.

Because Spanish, like English, can list several parallel elements with commas and then use y before the last one.

Here the list is:

• preparada la reseña
• revisada la bibliografía
• anotadas dos citas del prólogo

So the punctuation works just like:

• I’ll have the review prepared, the bibliography checked, and two quotations noted down.

This is the standard listing pattern, not something unusual.

Usually reseña means a review, write-up, or short critical summary, depending on context.

Common meanings include:

• a book review
• a film review
• a short academic review
• sometimes a brief overview or summary notice

In this sentence, since it also mentions bibliografía and prólogo, it sounds academic or literary, so review or write-up is a very natural interpretation.

Usually yes, but context matters.

Bibliografía can mean:

• the bibliography section of a paper or book
• the list of references
• sometimes the set of works consulted on a topic

In this sentence, revisada la bibliografía most likely means:

• the bibliography will have been checked/revised/reviewed

So it could refer to making sure the references are correct, complete, or properly formatted.

It means that the speaker will have written down or made note of two quotations from the prologue.

Key words:

• anotadas = noted down, written down, jotted down
• citas = quotations or citations, depending on context
• del prólogo = from the prologue

In a literary or academic context, citas often means quotations from a text.

So this part suggests the speaker has selected and recorded two useful lines from the prologue.

Because de + el contracts to del.

This is mandatory in normal Spanish:

• de + el = del
• a + el = al

So:

• dos citas del prólogo = two quotations from the prologue

The only important exception is when El is part of a proper name:

• de El Escorial
• de El Greco

But prólogo is just a common noun, so del is required.

Yes. Spanish often omits subject pronouns when the verb ending already makes the subject clear.

• tendré clearly means I will have

So there is no need to say yo unless the speaker wants emphasis or contrast:

• Yo tendré preparada la reseña, pero él no.

In the original sentence, no pronoun is needed because the verb form already tells you who the subject is.

Yes. A more explicit version could be:

• Cuando llegue el jueves, ya habré preparado la reseña, revisado la bibliografía y anotado dos citas del prólogo.

Or:

• Cuando llegue el jueves, ya tendré la reseña preparada, la bibliografía revisada y dos citas del prólogo anotadas.

These versions are a bit more transparent for learners.

The original sentence is perfectly correct, but it uses a compact, polished style that is especially common in formal writing.

Nothing in it is uniquely Spain-only. It is standard Spanish that would be understood across the Spanish-speaking world.

That said, the overall tone feels quite formal/written/academic, which may be especially noticeable to learners. The vocabulary is neutral and standard:

• reseña
• bibliografía
• prólogo
• citas

So this is best understood as formal standard Spanish, not as a specifically regional expression.