Το τηλέφωνό μου είναι πάνω σε ένα βιβλίο.

Το is the definite article for a neuter singular noun, meaning the.

So το τηλέφωνο = the phone.

In Greek, when you say my phone, you normally still keep the article:

• το τηλέφωνό μου = my phone

That is different from English, where we usually do not say the my phone.

This extra accent is very common in Greek when a word is followed by a weak pronoun like μου, σου, του, etc.

The basic word is:

• τηλέφωνο = phone

But when you add μου = my, Greek often adds or shifts an accent:

• τηλέφωνό μου = my phone

This helps keep the natural stress pattern clear in pronunciation.

In Greek, possessive words like μου (my) usually come after the noun, not before it.

So:

• το τηλέφωνό μου = literally the phone my

This is the normal Greek way to say my phone.

Other examples:

• το βιβλίο μου = my book
• η τσάντα μου = my bag

Είναι is the 3rd person singular form of είμαι, which means to be.

So here:

• Το τηλέφωνό μου είναι... = My phone is...

You can think of είναι as meaning is in this sentence.

Πάνω σε means on, on top of, or onto, depending on context.

In this sentence:

• πάνω σε ένα βιβλίο = on a book

A useful breakdown:

• πάνω = above / on top
• σε = a preposition often meaning in, at, to, on

Together, πάνω σε is a very common expression for physical position.

Because Greek often uses a phrase where English may use a single preposition.

English says:

• on a book

Greek commonly says:

• πάνω σε ένα βιβλίο

Here, πάνω gives the idea of on top/up above, and σε links it to the object.

This is just how Greek naturally expresses this idea.

Ένα is the indefinite article for a neuter singular noun, so it means a or one.

• ένα βιβλίο = a book

The noun βιβλίο is neuter, so it matches with ένα.

Compare:

• ένα βιβλίο = a book
• το βιβλίο = the book

After the preposition σε, Greek normally uses the accusative case.

So in this sentence, ένα βιβλίο is in the accusative.

For this particular noun, the nominative and accusative forms look the same:

• nominative: ένα βιβλίο
• accusative: ένα βιβλίο

So you do not see a change here, but grammatically it is accusative.

Yes. That would also be very natural Greek.

• πάνω στο βιβλίο = on the book
• πάνω σε ένα βιβλίο = on a book

The difference is mainly:

• ένα βιβλίο = an unspecified book
• το βιβλίο / στο βιβλίο = a specific book

Also, στο is a contraction:

• σε + το = στο

Not completely. Greek word order is more flexible than English.

The sentence:

• Το τηλέφωνό μου είναι πάνω σε ένα βιβλίο.

is a very neutral, natural way to say it.

But Greek can sometimes move things around for emphasis. For example, a speaker might change the order to emphasize where the phone is. Even so, the version you have is the safest and most standard one for learning.

Yes, it is natural and correct.

A Greek speaker would understand it immediately. In everyday speech, someone might also say:

• Το τηλέφωνό μου είναι πάνω στο βιβλίο.

if they mean a specific book.

So your sentence is perfectly fine; it just uses a book rather than the book.

It is pronounced roughly like tee-LE-fo-no.

The stress is on λέ:

• τη-ΛΕ-φω-νο

And in τηλέφωνό μου, you will hear:

• tee-LE-fo-NO moo

That extra written accent helps show the correct stress when μου follows.

In Greek, every noun has a grammatical gender: masculine, feminine, or neuter.

Βιβλίο (book) is a neuter noun, so it goes with:

• το = the (neuter singular)
• ένα = a (neuter singular)

That is why you get:

• το βιβλίο
• ένα βιβλίο

This gender is grammatical; it does not mean the object is biologically male or female.