Αν ξετυλίξεις το πακέτο τώρα, θα πρέπει μετά να το τυλίξεις ξανά πριν έρθουν οι καλεσμένοι.

After αν when Greek means if, Greek normally does not use θα. Instead, it often uses the subjunctive form of the verb, which here looks the same as the aorist subjunctive:

• αν ξετυλίξεις = if you unwrap
• not αν θα ξετυλίξεις

So the pattern is:

• Αν + subjunctive, main clause often with θα

That is why the sentence has:

• Αν ξετυλίξεις ... , θα πρέπει ...

ξετυλίξεις is the aorist subjunctive, 2nd person singular, from ξετυλίγω / ξετυλίξω.

Here it means you unwrap in the sense of if you do the action once / as a complete act.

Breakdown:

• ξε- = a prefix often suggesting undoing or un-
• τυλίγω = wrap
• ξετυλίγω = unwrap
• ξετυλίξεις = you unwrap / you should unwrap / if you unwrap, depending on context

In this sentence, because it follows αν, it means if you unwrap.

θα πρέπει can mean either:

• you will have to
• or sometimes you should

In this sentence, the natural meaning is closer to you’ll have to:

• θα πρέπει μετά να το τυλίξεις ξανά
  = you’ll have to wrap it again afterwards

So πρέπει by itself often means must / have to, and with θα it becomes future:

• πρέπει = must / have to
• θα πρέπει = will have to

Because πρέπει is followed by a subordinate verb clause introduced by να.

So:

• πρέπει να φύγω = I have to leave
• θα πρέπει να το τυλίξεις = you will have to wrap it

This is very common in Greek:

• μπορώ να... = I can...
• θέλω να... = I want to...
• πρέπει να... = I have to...

It is again the aorist subjunctive, 2nd person singular, from τυλίγω / τυλίξω.

Here it appears after να, so it means:

• να το τυλίξεις = to wrap it / that you wrap it

Because the action is seen as a single completed act, Greek uses the perfective/aorist form:

• τυλίξεις = wrap it up, complete the wrapping

This fits the context well: unwrap once, then wrap again once.

Greek commonly repeats the object with a pronoun, especially after the noun has already been mentioned.

So:

• το πακέτο = the package
• να το τυλίξεις = to wrap it

This is perfectly normal and very natural in Greek. Once το πακέτο has been introduced, Greek uses το to refer back to it.

English does this too, but Greek does it very consistently.

μετά means afterwards / later / then here.

In the sentence:

• θα πρέπει μετά να το τυλίξεις ξανά

it marks the sequence of actions:

1. unwrap now
2. wrap it again later

Its position is flexible, but here it naturally connects to the whole second action:

• then afterwards you’ll have to wrap it again

Other positions are possible in Greek, but this one is very natural.

Both can mean again, but ξανά often feels slightly more straightforward for once again / another time.

So:

• να το τυλίξεις ξανά = to wrap it again

You could also hear πάλι in many contexts, but ξανά is very common for repeating an action.

Very roughly:

• ξανά = again, one more time
• πάλι = again, but also sometimes still / on the other hand / back to the same thing, depending on context

Here ξανά is a very clear choice.

After πριν, Greek can use the verb directly without να, especially in ordinary modern usage.

So:

• πριν έρθουν οι καλεσμένοι = before the guests come

This is very common and natural.

You may also encounter πριν να... in some contexts, but πριν έρθουν is completely standard.

έρθουν is the aorist subjunctive, 3rd person plural, from έρχομαι.

It means:

• they come

in a clause like:

• πριν έρθουν οι καλεσμένοι = before the guests come

Even though έρχομαι is a middle/passive-looking verb in form, it simply means come.

Because the subject is plural:

• οι καλεσμένοι = the guests

So the verb must also be plural:

• έρθουν = they come

If the subject were singular, the verb would change:

• πριν έρθει ο καλεσμένος = before the guest comes

Yes, literally it comes from the passive participle of καλώ (to call/invite) and means:

• the invited ones

But in normal English, the natural translation is:

• the guests

So:

• ο καλεσμένος = guest
• οι καλεσμένοι = guests

This is a very common Greek way of forming nouns from participles.

Because Greek is not using a past tense here. It is using the aorist subjunctive, which often expresses a single complete action, not past time.

That is very important.

In this sentence:

• ξετυλίξεις
• τυλίξεις
• έρθουν

are not past. They refer to possible or expected future actions inside clauses such as:

• if you unwrap
• to wrap
• before they come

So the key idea is aspect, not past time:

• aorist/perfective = complete action
• not necessarily past

Not naturally in this sentence.

The speaker is talking about single, complete actions:

• unwrap the package once
• wrap it again once
• before the guests arrive

So Greek uses the perfective/aorist forms.

If you used imperfective forms, the meaning would shift toward:

• repeated action
• ongoing action
• habitual action

For example, that would sound more like if you are unwrapping it or if you keep unwrapping it, depending on context, which is not the intended meaning here.

Greek word order is more flexible than English word order because verb endings and articles give more grammatical information.

This sentence is arranged in a very natural Greek way:

• Αν ξετυλίξεις το πακέτο τώρα
• θα πρέπει μετά να το τυλίξεις ξανά
• πριν έρθουν οι καλεσμένοι

English often relies more heavily on word order alone. Greek can move words around for emphasis, rhythm, or style, while keeping the same basic meaning.

It means now, but in this sentence it strongly suggests now / at this moment / before you should.

So:

• Αν ξετυλίξεις το πακέτο τώρα
  = If you unwrap the package now

The idea is that doing it now will create a problem, because later you will need to wrap it again before the guests arrive.

So in context, τώρα has a practical sense close to right now.

It is both a condition and a warning/advice.

Structurally, it is a condition:

• If you unwrap the package now, ...

But pragmatically, the speaker is warning the listener:

• If you do that, there will be extra work later.

So the tone is something like:

• If you open it now, you’ll have to wrap it again before the guests come.

That is a very common use of conditional sentences in Greek, just as in English.