Αν χρειάζεσαι διευκρίνιση για το νέο πρόγραμμα, στείλε μου μήνυμα πριν φύγεις.

Greek often leaves subject pronouns out because the verb ending already shows who the subject is.

• χρειάζεσαι = you need
• στείλε = send! addressed to you
• φύγεις = you leave

You could add εσύ for emphasis, but it is not necessary here.

Because χρειάζομαι is a very common Greek verb with middle/passive forms but an active meaning. So:

• χρειάζομαι = I need
• χρειάζεσαι = you need

This is normal Greek usage, not a passive meaning.

Both can work, but they feel slightly different.

• Αν χρειάζεσαι sounds more general: if you need / if you happen to need
• Αν χρειαστείς sounds more like a single future occasion: if you end up needing

In this sentence, Αν χρειάζεσαι gives a broad, natural if you need clarification meaning.

Greek often leaves an indefinite singular noun bare, especially after verbs like χρειάζομαι.

So χρειάζεσαι διευκρίνιση is a natural way to say you need clarification.

You could also say μια διευκρίνιση, but that sounds a bit more like a clarification as one specific item. The version without μια is smoother and more general here.

Διευκρίνιση means clarification. In this sentence it means that something about the new program/schedule may need to be explained more clearly.

It is a formal-to-neutral word and is very common in work, school, and official contexts.

Here it means about/regarding the new program.

The preposition για has several uses, and one of them is about/concerning. So:

• διευκρίνιση για το νέο πρόγραμμα = clarification about the new program

Also, πρόγραμμα can mean program, plan, or schedule, depending on context.

Στείλε is the aorist imperative of στέλνω. It tells someone to do the action once, as a complete action:

• στείλε μου μήνυμα = send me a message

Στέλνε would be the present imperative, which usually suggests repetition or ongoing action:

• στέλνε μου μηνύματα = keep sending me messages / send me messages regularly

So στείλε is the right choice for one message.

Μου is a weak pronoun meaning to me. With a positive imperative, these weak pronouns normally come after the verb in Greek.

So:

• στείλε μου = send me

That word order is standard and very natural.

Not always. Μήνυμα literally means message.

Depending on context, it can mean:

• a text message
• an online message
• a general message

In everyday speech, στείλε μου μήνυμα very often does imply send me a text / message me, but the exact type depends on the situation.

Because Greek normally uses the perfective/subjunctive-type form after πριν when talking about a single event in the future.

So:

• πριν φύγεις = before you leave

Here φύγεις comes from φεύγω and refers to one complete act of leaving. That is the natural choice in this sentence.

It is the 2nd person singular subjunctive/perfective non-past form of φεύγω.

In simpler learner terms: it is the form Greek uses after words like πριν to mean you leave in a future or not-yet-completed sense.

So:

• πριν φύγεις = before you leave

Yes, Greek word order is fairly flexible, but the original order is very natural.

The sentence as given:

• Αν χρειάζεσαι διευκρίνιση για το νέο πρόγραμμα, στείλε μου μήνυμα πριν φύγεις.

works well because it first gives the condition, then the instruction.

You might hear small variations, such as adding ένα:

• στείλε μου ένα μήνυμα

But the original version is idiomatic and correct.