Ακούω την κασέτα στο αυτοκίνητο.

In Greek, the verb ending often already tells you the subject.

Ακούω means I hear or I am listening.
The -ω ending shows first person singular, so Greek usually does not need a separate subject pronoun like εγώ (I).

You could say Εγώ ακούω... if you want emphasis, but normally Ακούω... is enough.

It can mean both, depending on context.

In this sentence, Ακούω την κασέτα is most naturally understood as I’m listening to the cassette. Greek often uses ακούω where English prefers listen to.

So:

• Ακούω μουσική = I listen to music
• Ακούω έναν θόρυβο = I hear a noise

Context tells you which meaning is intended.

Την means the, and it is the feminine singular accusative form of the definite article.

Because κασέτα is the direct object of the verb (the thing being listened to), Greek uses the accusative:

• nominative: η κασέτα = the cassette
• accusative: την κασέτα = the cassette (as an object)

In English, the does not change form, but in Greek it does.

That is normal for many feminine nouns in Greek.

The noun κασέτα has the same form in the singular nominative and accusative:

• η κασέτα
• την κασέτα

So the case difference is shown mainly by the article, not by the noun ending.

Στο is a contraction of σε + το.

• σε = in / at / on / to
• το = the (neuter singular)

So:

• στο αυτοκίνητο = literally in/to/at the car
• in this sentence, the natural meaning is in the car

This contraction is extremely common in Greek:

• σε + τον = στον
• σε + τη(ν) = στη(ν)
• σε + το = στο

Greek σε is broader than English to. It can mean:

• to
• in
• at
• sometimes on

So στο αυτοκίνητο can mean in the car here.

Prepositions do not always match one-to-one between Greek and English, so it is best to learn them through examples rather than expecting an exact equivalent every time.

It is in the accusative, but for many neuter nouns the nominative and accusative look the same.

So:

• το αυτοκίνητο = nominative or accusative
• after σε / στο, Greek uses the accusative in Modern Greek

That is why the form stays αυτοκίνητο.

No, Greek word order is more flexible than English.

This version is a very natural neutral order:

• verb + object + location

But other orders are possible, for example:

• Στο αυτοκίνητο ακούω την κασέτα. = In the car, I listen to the cassette.
• Την κασέτα ακούω στο αυτοκίνητο. = puts more focus on the cassette

The endings and articles help show the grammar, so word order can move more freely for emphasis.

In this sentence, no. The natural meaning is in the car.

Greek σε can cover several English prepositions, but with αυτοκίνητο the phrase στο αυτοκίνητο normally means in the car or inside the car context.

If you wanted to be extra explicit, you could say:

• μέσα στο αυτοκίνητο = inside the car

But στο αυτοκίνητο is perfectly normal.

A rough pronunciation is:

a-KOU-o tin ka-SE-ta sto af-to-KI-ni-to

A few helpful notes:

• Ακούω has the stress on κού
• κασέτα has the stress on σέ
• αυ in αυτοκίνητο is pronounced af before voiceless sounds like τ
• στο is pronounced together as one word

So αυτοκίνητο sounds roughly like af-to-KI-ni-to.

The accent marks show which syllable is stressed.

In this sentence:

• Ακούω → stress on κού
• κασέτα → stress on σέ
• αυτοκίνητο → stress on κί

Stress matters in Greek pronunciation, so it is important to learn words together with their accent marks.

Yes. It is a standard Modern Greek word, borrowed from cassette.

So η κασέτα means the cassette.
It may sound a bit dated because cassettes are old technology, but grammatically the sentence is completely normal and useful for learning.

Yes, but the meaning changes slightly.

• Ακούω την κασέτα στο αυτοκίνητο = I’m listening to the cassette / the specific cassette in the car
• Ακούω κασέτα στο αυτοκίνητο = more like I listen to cassette(s) in the car or I’m listening to a cassette in the car, depending on context

Using the article makes the noun definite and more specific.