Μπορείς να μου πεις πώς να ανοίξω την ιστοσελίδα όταν η σύνδεση δεν είναι καλή;

Μπορείς means you can. In Greek, when μπορώ is followed by another verb, that second verb normally comes after να.

So:

• Μπορείς = you can
• να πεις = to say / say

Together, Μπορείς να μου πεις... means Can you tell me...

This is a very common Greek pattern:

• Μπορώ να έρθω; = Can I come?
• Μπορείς να βοηθήσεις; = Can you help?

μου means to me or me, depending on the context. Here it is an indirect object: tell me.

So:

• πες = say / tell
• μου = to me
• πες μου = tell me

In your sentence, it appears as:

• να μου πεις = to tell me

Greek object pronouns like μου, σου, του, της are very often placed before the verb in structures like this.

After verbs like tell me, Greek often uses πώς να + subjunctive to mean how to do something.

So:

• πώς να ανοίξω = how to open
• literally, something like how I should open / how I can open

If you said πώς ανοίγω, that sounds more like how do I open in a direct, more factual sense. But after μπορείς να μου πεις..., Greek very naturally uses:

• πώς να ανοίξω... = how to open...

This is a very common structure:

• Πες μου πώς να το κάνω. = Tell me how to do it.
• Δεν ξέρω πώς να φύγω. = I don’t know how to leave.

ανοίξω is the aorist subjunctive form of ανοίγω.

That sounds technical, but the important idea is this:

• ανοίγω = I open / I am opening
• να ανοίξω = to open / that I open, usually referring to a single complete action

Here, the speaker wants to know how to perform one action: open the website. That is why Greek uses να ανοίξω rather than a present form.

This is very normal after να.

την ιστοσελίδα is the direct object of ανοίξω.

• η ιστοσελίδα = the website/webpage, nominative
• την ιστοσελίδα = the website/webpage, accusative

Greek changes the article, and sometimes the noun form, depending on the role in the sentence.

Here, the website is the thing being opened, so it takes the accusative:

• η ιστοσελίδα = the website
• ανοίγω την ιστοσελίδα = I open the website

Literally, ιστοσελίδα often means webpage. In everyday use, though, many speakers also use it loosely for website.

So in real Greek:

• ιστοσελίδα can mean webpage
• but it is often used where English speakers might say website

A more precise word for website is ιστότοπος, but ιστοσελίδα is extremely common in everyday speech.

So learners should know both:

• ιστοσελίδα = webpage / often website in ordinary use
• ιστότοπος = website

όταν means when.

In this sentence, it introduces the situation:

• όταν η σύνδεση δεν είναι καλή = when the connection is not good

Greek often uses the present tense after όταν for general or repeated situations, just as English can say:

• when the connection isn’t good

So δεν είναι is completely natural here. It describes a general condition, not one specific past event.

η σύνδεση means the connection.

In context, it usually means the internet connection or network connection. Greek often leaves that understood if the context is clear.

So:

• η σύνδεση = the connection
• in this sentence, probably the internet connection

If you wanted to be more explicit, you could say something like:

• η σύνδεση στο ίντερνετ = the internet connection

But the shorter η σύνδεση is very natural.

Because καλή has to agree with η σύνδεση, which is feminine singular.

Greek adjectives change form to match the noun’s:

• gender
• number
• case

Here:

• η σύνδεση = feminine singular
• so good becomes καλή

Compare:

• ο καιρός είναι καλός = the weather is good
• η σύνδεση είναι καλή = the connection is good
• το φαγητό είναι καλό = the food is good

Greek word order is more flexible than English, but this order is very natural and neutral.

The structure is:

• Μπορείς να μου πεις = Can you tell me
• πώς να ανοίξω την ιστοσελίδα = how to open the website
• όταν η σύνδεση δεν είναι καλή = when the connection is not good

You can sometimes move things for emphasis, but the given order is standard and easy to understand.

For example, Greek could move πώς or the final clause in some contexts, but a learner should treat this sentence as a very good default model.

In Greek, the question mark is written as ;.

So the final symbol in:

• ...δεν είναι καλή;

is not a semicolon in Greek punctuation. It is the normal Greek question mark.

This is one of the first punctuation differences learners notice:

• Greek ; = English ?
• Greek · = a kind of semicolon/colon-like punctuation mark

So yes, the sentence is correctly punctuated as a question.

Yes, you could say πώς μπορώ να ανοίξω, and it would also be understandable and natural.

Compare:

• πώς να ανοίξω = how to open
• πώς μπορώ να ανοίξω = how I can open

The version with πώς να ανοίξω is especially common after expressions like:

• πες μου = tell me
• δείξε μου = show me
• δεν ξέρω = I don’t know

So in your sentence, πώς να ανοίξω is a very idiomatic choice.