Η αναφορά είναι έτοιμη· αυτήν θα τη στείλω αύριο.

Because αναφορά is a feminine singular noun, and Greek adjectives agree with the noun they describe in gender, number, and case.

So:

• η αναφορά = feminine singular
• έτοιμη = feminine singular form of έτοιμος (ready)

If the noun were masculine or neuter, the adjective would change too:

• ο φάκελος είναι έτοιμος
• το έγγραφο είναι έτοιμο

Greek uses the definite article very often, especially when talking about a specific, known thing.

So Η αναφορά means the report, referring to a particular report already understood from context.

That is very normal in Greek. In many places where English might omit the, Greek still prefers to include the article.

Here αυτήν is a stressed direct-object pronoun in the accusative feminine singular.

It points back to την αναφορά and adds emphasis, roughly like:

• that one
• this one
• it with emphasis

So the speaker is not just saying I’ll send it tomorrow, but something closer to that one, I’ll send tomorrow or that, I’ll send tomorrow.

Yes, in a sense they both refer to the same object, but they do different jobs.

• αυτήν is the stressed form
• τη is the unstressed clitic pronoun

Greek often uses this kind of object doubling when the object is emphasized or placed at the front of the sentence.

So:

• Αυτήν θα τη στείλω αύριο.

is natural Greek.

It is not considered redundant in the way it might feel in English. The fronted αυτήν highlights the object, and τη is the normal clitic that stays with the verb.

This is the accusative feminine singular form of αυτή.

In Modern Greek, the final -ν in forms like αυτήν may be:

• always kept in more careful or formal writing
• kept especially before vowels or certain consonants
• sometimes omitted in less formal writing

So you may see both:

• αυτήν θα τη στείλω
• αυτή θα τη στείλω

Both are possible, but αυτήν is perfectly standard and often looks a bit more careful or explicit in writing.

In Modern Greek, unstressed object pronouns like με, σε, τον, τη, το, μας usually come before the finite verb.

So:

• τη στέλνω
• θα τη στείλω
• δεν τη στέλνω

With θα, the clitic normally comes between θα and the verb:

• θα τη στείλω

That is the normal word order.

Θα is the particle used to form the future in Modern Greek.

So:

• θα στείλω = I will send

It does not work like an English auxiliary verb such as will in every grammatical sense, but for a learner, thinking of it as the regular future marker is a good start.

Because Greek often uses the aorist stem after θα when talking about a single, complete action in the future.

So:

• θα τη στείλω = I will send it (one complete action)

By contrast, στέλνω is the present/imperfective stem. After θα, it usually suggests an ongoing, repeated, or habitual action:

• θα τη στέλνω κάθε εβδομάδα = I’ll be sending it every week

In your sentence, the speaker means one future act of sending, so στείλω is the natural choice.

Yes, Greek word order is flexible.

Αύριο can often move depending on emphasis:

• Αυτήν θα τη στείλω αύριο
• Αύριο θα τη στείλω
• Θα τη στείλω αύριο

The version in your sentence puts the time expression at the end in a very natural, neutral way, while keeping emphasis on αυτήν at the front.

Putting αυτήν first gives it special emphasis.

Greek frequently moves elements to the front of the sentence to highlight them. Here the idea is something like:

• As for that one, I’ll send it tomorrow
• That one, I’ll send tomorrow

So the speaker is contrasting or highlighting the report, perhaps implying that something else may not be sent tomorrow.

That mark is called άνω τελεία in Greek.

It functions like a stronger pause, often similar to an English:

• semicolon
• colon

So in this sentence it separates two closely connected statements:

• Η αναφορά είναι έτοιμη
• αυτήν θα τη στείλω αύριο

It is not the Greek question mark. The Greek question mark looks like ;

Yes, absolutely.

That version uses the full noun phrase again instead of the pronoun:

• Την αναφορά θα τη στείλω αύριο

This is also very natural Greek. It still shows object doubling because την αναφορά is echoed by τη.

Compared with αυτήν, repeating την αναφορά sounds a bit more explicit. Using αυτήν sounds more like that one / it and depends more on the previous sentence for reference.