Όταν γυρίζω κουρασμένος, ξαπλώνω στον καναπέ για δέκα λεπτά και δεν μιλάω σε κανέναν.

It can be understood as either, but in this sentence it has a habitual sense, so whenever is often the best explanation.

Because the verbs are in the present and describe something that usually happens, Όταν γυρίζω κουρασμένος... means something like:

When / Whenever I come back tired...

So it is not about one single event, but a repeated pattern.

In Greek, the present tense is often used for habitual or repeated actions, just like in English:

When I come back tired, I lie down...

It does not have to mean the action is happening right now. Here it describes the speaker’s routine or usual behavior.

This is a very common learner question.

• όταν γυρίζω = when/whenever I come back, as a habit or repeated situation
• όταν γυρίσω = when I come back, referring to one specific future occasion

So:

• Όταν γυρίζω κουρασμένος, ξαπλώνω... = this is what I usually do
• Όταν γυρίσω, θα ξαπλώσω... = when I come back later, I will lie down

The first is habitual present. The second is about a single future event.

Κουρασμένος is an adjective meaning tired, and it agrees with the person being described.

Here, the subject is an implied I, and the adjective is masculine singular, so it suggests the speaker is male.

• male speaker: κουρασμένος
• female speaker: κουρασμένη

So the sentence is saying:

When I come back tired...

with tired describing the speaker’s condition at the time of returning.

Because Greek often leaves out subject pronouns when they are clear from the verb ending.

For example:

• γυρίζω = I return / I come back
• ξαπλώνω = I lie down
• μιλάω = I speak / I talk

So Greek does not need εγώ here. You could add εγώ for emphasis, but normally it is omitted.

Yes. Γυρίζω is a very common everyday verb, and one of its meanings is come back / return.

It can also mean things like turn or go around, depending on context, but here the meaning is clearly come back.

A more formal or neutral verb for return is επιστρέφω, but γυρίζω is extremely natural in everyday speech.

Στον is the contracted form of σε τον.

So:

• σε + τον = στον

This is very common in modern Greek.

Similar forms are:

• στη(ν) = σε την
• στο = σε το
• στους = σε τους

In this sentence, στον καναπέ means on the couch / sofa.

After σε (and its contracted forms like στον), Greek normally uses the accusative.

The noun is:

• nominative: ο καναπές
• accusative: τον καναπέ

So:

• στον καναπέ = σε τον καναπέ

Even though English says on the couch, Greek uses σε + accusative for many location meanings.

Greek uses για + accusative to express duration.

So:

• για δέκα λεπτά = for ten minutes
• για μία ώρα = for one hour
• για λίγο = for a little while

This is a very common pattern.

This is an example of negative concord, which is normal in Greek.

• δεν = the negative marker, not
• κανέναν = anyone / anybody in this negative structure

So:

δεν μιλάω σε κανέναν = I don’t talk to anyone

Even though English uses anyone, Greek commonly uses κανέναν together with δεν.

Also, μιλάω σε κάποιον / σε κανέναν means talk to someone / to anyone. That is why you see σε before κανέναν.

Yes. Both mean I speak / I talk.

• μιλάω is very common in everyday speech
• μιλώ is also correct and may sound a bit more formal or slightly more concise

So:

• δεν μιλάω σε κανέναν
• δεν μιλώ σε κανέναν

Both are correct and mean the same thing.

Because the sentence begins with a subordinate clause introduced by Όταν:

Όταν γυρίζω κουρασμένος, ...

Greek usually separates that opening clause from the main clause with a comma, just as English often does:

When I come back tired, I lie down...

So the comma helps mark the structure of the sentence clearly.