Τη στιγμή που σηκώνομαι από την καρέκλα, χτυπάει το τηλέφωνό μου.

Τη στιγμή που is a very common Greek expression meaning at the moment when, the moment that, or simply just as.

In this sentence, it introduces the action that is happening at the same time as the phone rings:

• Τη στιγμή που σηκώνομαι... = Just as I get up...

So it functions as a time expression plus a linking word:

• τη στιγμή = the moment
• που = that/when

Together they act like the moment that / when.

Because here στιγμή is not the subject of the sentence. It is part of a time expression, so it appears in the accusative:

• nominative: η στιγμή = the moment
• accusative: τη στιγμή = the moment in expressions like at the moment, the moment that

Greek often uses the accusative in expressions of time and duration. So Τη στιγμή που... is a set pattern.

Here που is a connector introducing a subordinate clause. In this sentence it means something like when or that:

• Τη στιγμή που σηκώνομαι... = The moment when I get up...

This που is very common in everyday Greek and can link clauses in a simpler, less formal way than some other structures.

It is not the same as the question word πού with an accent, which means where.

So:

• που = that / when
• πού = where

Because Greek usually does not need an explicit subject pronoun when the verb ending already shows who the subject is.

The ending of σηκώνομαι tells us it means I get up / I am getting up.

So Greek normally says:

• σηκώνομαι = I get up / I’m getting up

and not necessarily:

• εγώ σηκώνομαι

You can add εγώ only if you want emphasis or contrast.

σηκώνομαι means I get up, I stand up, or I rise.

It is related to σηκώνω, which often means I lift / raise something. But σηκώνομαι is the form used when the subject is the one getting up.

So:

• σηκώνω την καρέκλα = I lift the chair
• σηκώνομαι από την καρέκλα = I get up from the chair

Even though σηκώνομαι has middle/passive-type endings, here it is not really translated as a passive in English. It simply means I get up.

από means from, so:

• από την καρέκλα = from the chair

A few useful things are happening here:

• από takes the accusative in Modern Greek
• καρέκλα is feminine
• so the article becomes την

That is why you get:

• από + την καρέκλα

Greek also uses the definite article more often than English, so from the chair is very natural here.

Greek often uses the present tense for vivid, immediate narration, especially when describing something happening right at that moment.

So this sentence gives a sense like:

• Just as I’m getting up from the chair, my phone rings.

It feels immediate and alive.

If you wanted a clearly past version, you could change both verbs:

• Τη στιγμή που σηκώθηκα από την καρέκλα, χτύπησε το τηλέφωνό μου.
• The moment I got up from the chair, my phone rang.

So the present here is not strange; it is a natural way to describe an event as it unfolds.

Literally, χτυπάει comes from χτυπάω / χτυπώ, meaning things like hit, strike, knock, or beat.

But in everyday Greek, it is also the normal verb for sounds such as:

• a phone ringing
• a bell ringing
• a clock striking
• someone knocking at the door

So:

• χτυπάει το τηλέφωνο = the phone is ringing / the phone rings

This is very idiomatic and completely normal Greek.

Also, you may see both:

• χτυπάει
• χτυπά

Both are standard forms in Modern Greek.

This happens because μου is an enclitic word, meaning it leans on the previous word. In Greek, when certain unstressed words such as μου, σου, του follow a noun, an extra written accent often appears on the noun.

So:

• basic word: τηλέφωνο
• with enclitic: το τηλέφωνό μου

This extra accent helps preserve the correct stress pattern.

So το τηλέφωνό μου means my phone.

Normally, no. The usual way to say my phone is:

• το τηλέφωνό μου

That is the standard possessive structure: article + noun + possessive pronoun.

If you want emphasis, you can say:

• το δικό μου τηλέφωνο = my own phone / my phone with emphasis

But the neutral, everyday form is:

• το τηλέφωνό μου

Greek word order is more flexible than English word order.

In this sentence:

• χτυπάει το τηλέφωνό μου

the verb comes first, then the subject. This is very natural in Greek, especially when introducing an event or describing something that suddenly happens.

English usually prefers:

• my phone rings

But Greek often allows:

• rings my phone in structure, though of course that is not how you translate it into English.

So this word order is normal and idiomatic.

Yes, the comma is natural here because the sentence begins with a subordinate time clause:

• Τη στιγμή που σηκώνομαι από την καρέκλα, χτυπάει το τηλέφωνό μου.

The first part sets the time frame, and the main clause comes after it. Greek punctuation often matches English in this kind of structure.

If you reversed the order, you might not need the same comma placement:

• Χτυπάει το τηλέφωνό μου τη στιγμή που σηκώνομαι από την καρέκλα.

Both are possible, but the original sentence is very natural.