Το χειμώνα κοιμάμαι με χοντρό πάπλωμα, αλλά το καλοκαίρι μου φτάνει μόνο ένα λεπτό σεντόνι.

In Greek, expressions of time often use the accusative without a preposition. So:

• το χειμώνα = in winter / during winter
• το καλοκαίρι = in summer / during summer

This is a very common pattern for time expressions. Greek does not always need a word like in before seasons, months, dates, and similar time phrases.

Compare:

• Το χειμώνα κάνει κρύο. = It’s cold in winter.
• Την Κυριακή θα φύγω. = I’ll leave on Sunday.

You may also hear τον χειμώνα. That is also used, especially because χειμώνας is a masculine noun. But το χειμώνα is very common in everyday Greek as a time expression.

Because after το in this sentence, the noun is in the accusative singular, not the nominative.

The dictionary form is:

• ο χειμώνας = winter

But here it is used as a time expression, so it becomes:

• το(ν) χειμώνα = in winter

So:

• nominative: ο χειμώνας
• accusative: τον / το χειμώνα

This same kind of change happens with many masculine nouns in Greek.

Greek usually does not need subject pronouns unless you want emphasis or contrast.

The verb ending already shows the subject:

• κοιμάμαι = I sleep / I am sleeping

So εγώ is unnecessary here. If you said Εγώ κοιμάμαι..., it would sound more like:

• I sleep...
• As for me, I sleep...

In neutral sentences, Greek normally leaves the subject pronoun out.

Yes. κοιμάμαι is present tense, first person singular: I sleep / I am sleeping.

In this sentence, it has a habitual meaning, not a right-now meaning:

• Το χειμώνα κοιμάμαι... = In winter I sleep...

So it means this is what I عادة do in winter, not necessarily I am sleeping right now.

Also, κοιμάμαι is one of those Greek verbs that use middle/passive-type endings in the present:

• κοιμάμαι
• κοιμάσαι
• κοιμάται

But its meaning is active: sleep.

The preposition με takes the accusative.

So:

• με πάπλωμα = with a duvet
• με χοντρό πάπλωμα = with a thick duvet

Both χοντρό and πάπλωμα are in the same case, gender, and number:

• πάπλωμα = neuter singular
• χοντρό = neuter singular accusative/nominative form of χοντρός

So the adjective agrees with the noun, just as in English thick duvet.

χοντρός / χοντρή / χοντρό can mean fat for people, but for objects it often means:

• thick
• heavy
• bulky

So:

• χοντρό πάπλωμα = a thick/heavy duvet
• λεπτό σεντόνι = a thin sheet

This is very natural Greek. For bedding, χοντρό and λεπτό are exactly the kinds of adjectives you would expect.

φτάνει here means is enough / suffices.

The little word μου means for me. It is an indirect object clitic.

So:

• μου φτάνει = is enough for me

Literally, Greek says something like:

• to me, only a thin sheet is enough

Examples of the same pattern:

• Μου αρκεί αυτό. = That’s enough for me.
• Δε μου φτάνουν τα χρήματα. = The money isn’t enough for me.

So μου is not possessive here. It does not mean my. It means to/for me.

Because the grammatical subject of φτάνει is ένα λεπτό σεντόνι.

Greek is saying:

• μόνο ένα λεπτό σεντόνι μου φτάνει
• only a thin sheet is enough for me

So the subject is ένα λεπτό σεντόνι = one thin sheet, which is third person singular. That is why the verb is:

• φτάνει = it is enough

If the subject were I, then you would use φτάνω. But here the sheet is what suffices, not the speaker.

μόνο means only / just. Its position shows what it modifies.

Here:

• μου φτάνει μόνο ένα λεπτό σεντόνι

This means:

• only a thin sheet is enough for me
• I only need a thin sheet

So μόνο limits the noun phrase ένα λεπτό σεντόνι.

You could think of it as emphasizing that nothing more than that is needed.

ένα can mean both:

• a/an
• one

In this sentence, it mainly works like a, but it can also carry a slight sense of just one because of μόνο:

• μόνο ένα λεπτό σεντόνι = only a thin sheet / just one thin sheet

So Greek often uses the same word where English uses either a or one, depending on context.

Greek often omits the indefinite article in some expressions, especially after prepositions, where English would naturally say a.

So:

• με χοντρό πάπλωμα is natural Greek for with a thick duvet

Greek could also say:

• με ένα χοντρό πάπλωμα

That would sound a bit more specific or slightly more explicit: with a thick duvet / with one thick duvet.

In the second half, ένα is used because the speaker is focusing on the minimal amount needed:

• μόνο ένα λεπτό σεντόνι

So the difference is not a grammar mistake; it is a natural choice of phrasing.

The normal order is:

• article / number + adjective + noun

So:

• ένα λεπτό σεντόνι
• ένα μεγάλο σπίτι
• μια όμορφη μέρα

That is the most neutral order.

Greek can sometimes change word order for emphasis, but for a learner, the safest pattern is:

• article + adjective + noun

Also note the agreement:

• ένα = neuter singular
• λεπτό = neuter singular
• σεντόνι = neuter singular

αλλά means but, so it introduces a contrast.

The sentence contrasts winter and summer:

• in winter: χοντρό πάπλωμα
• in summer: μόνο ένα λεπτό σεντόνι

So αλλά is the natural connector because the two halves describe opposite needs.

If you used και, it would just add information:

• ...and in summer...

But the speaker wants to highlight the contrast, so αλλά is better.

Yes, the word order is very natural.

Current order:

• Το χειμώνα κοιμάμαι με χοντρό πάπλωμα, αλλά το καλοκαίρι μου φτάνει μόνο ένα λεπτό σεντόνι.

Greek allows more flexibility than English, so you could rearrange parts for emphasis, for example:

• Το καλοκαίρι μόνο ένα λεπτό σεντόνι μου φτάνει.
• Με χοντρό πάπλωμα κοιμάμαι το χειμώνα.

But the original sentence is smooth, idiomatic, and easy to understand. It presents the time phrase first in each half, which makes the contrast very clear.

Yes.

• το πάπλωμα = duvet / quilt
• το σεντόνι = sheet

Both are neuter singular, which is why their adjectives are also neuter:

• χοντρό πάπλωμα
• λεπτό σεντόνι

This is a good example of adjective agreement in Greek:

• masculine: χοντρός, λεπτός
• feminine: χοντρή, λεπτή
• neuter: χοντρό, λεπτό