Όσο κοιμάται το μωρό, εγώ γράφω ένα μήνυμα.

Here όσο means while / for as long as.

So Όσο κοιμάται το μωρό, εγώ γράφω ένα μήνυμα gives the idea while the baby is sleeping or as long as the baby is asleep, I am writing a message.

A quick comparison:

• όσο = while / as long as
• όταν = when (more like a point in time or repeated situation)
• ενώ = while, often used to contrast two actions or simply describe two things happening at once

In this sentence, όσο highlights the duration: during the time the baby sleeps, the other action happens.

Κοιμάται is the standard 3rd person singular form of κοιμάμαι (to sleep).

• κοιμάμαι = I sleep / I am sleeping
• κοιμάσαι = you sleep
• κοιμάται = he/she/it sleeps

Greek verbs like κοιμάμαι belong to a group that use endings that may look passive, but many of them are not passive in meaning. Κοιμάμαι simply means I sleep, not I am slept.

You may hear forms like κοιμάει in some spoken usage or regional speech, but for learners, κοιμάται is the normal form to use here.

Greek uses the definite article much more often than English.

• το μωρό = the baby
• μωρό = baby / a baby in a less specific or more general sense, depending on context

In this sentence, το μωρό refers to a specific baby already known from the situation, so the article is natural.

Greek often sounds incomplete or less natural without the article when talking about a specific person or thing.

Yes. In Greek, the verb ending already shows the subject:

• γράφω = I write / I am writing

So εγώ is not necessary for basic grammar. It is included for emphasis, contrast, or clarity.

Here εγώ can suggest something like:

• As for me, I’m writing a message
• I’m writing a message, while the baby is sleeping

If you remove it, the sentence is still correct:

• Όσο κοιμάται το μωρό, γράφω ένα μήνυμα.

That version is a little more neutral.

In Greek, the present tense often covers both:

• I write
• I am writing

So:

• γράφω can mean I write in a general sense
• or I am writing right now, depending on context

Because this sentence describes something happening at the same time as another action, the natural English translation is usually the progressive: I am writing.

This is very common in Greek: the simple present often corresponds to the English present progressive.

Ένα μήνυμα is in the accusative case, because it is the direct object of γράφω.

You are writing what?
→ ένα μήνυμα

Breakdown:

• ένα = a / one for a neuter noun in accusative singular
• μήνυμα = message (neuter noun)

So:

• γράφω ένα μήνυμα = I write / am writing a message

In this case, the nominative and accusative forms of many neuter nouns are the same, so μήνυμα looks unchanged.

Yes, μήνυμα is neuter.

You can tell from:

• the article/determiner: ένα
• the noun ending: -μα, which is very often neuter in Greek

Common pattern:

• το μήνυμα = the message
• ένα μήνυμα = a message

Other neuter nouns with similar endings include:

• το όνομα = the name
• το γράμμα = the letter
• το πρόβλημα = the problem

So μήνυμα follows a very useful neuter pattern.

Yes. Greek word order is more flexible than English word order.

This sentence starts with the time clause:

• Όσο κοιμάται το μωρό = while the baby is sleeping

Then comes the main clause:

• εγώ γράφω ένα μήνυμα = I am writing a message

You could also say:

• Εγώ γράφω ένα μήνυμα όσο κοιμάται το μωρό.
• Γράφω ένα μήνυμα όσο κοιμάται το μωρό.

These are all grammatical. The difference is mostly one of emphasis and flow.

Starting with Όσο κοιμάται το μωρό puts the time setting first.

The comma separates the subordinate clause from the main clause.

• Όσο κοιμάται το μωρό, = dependent time clause
• εγώ γράφω ένα μήνυμα. = main clause

When the subordinate clause comes first, Greek normally uses a comma, just as English often does:

• While the baby is sleeping, I am writing a message.

If the order changes, punctuation may vary, but in this sentence the comma is standard and natural.

Yes, literally it is something like sleeps the baby, but that is normal in Greek.

Greek allows both:

• Το μωρό κοιμάται
• Κοιμάται το μωρό

Both mean the baby is sleeping.

Putting the verb before the subject is common in Greek and often sounds very natural, especially in clauses like this one. English usually needs a fixed order, but Greek does not rely on word order as strictly because the verb endings and articles give more grammatical information.

By itself, it could technically be understood either way, because the Greek present tense can describe:

• a current action
• a habitual or repeated action

But the most natural reading here is something happening right now:

• the baby is sleeping
• and during that time, the speaker is writing a message

If you wanted to make it clearly habitual, context would usually do that, for example:

• Όσο κοιμάται το μωρό κάθε απόγευμα, εγώ γράφω μηνύματα.

That would suggest a repeated routine.

You might hear that in very informal speech, especially in fast conversation, but for standard Greek, γράφω ένα μήνυμα is the normal and complete form.

Compare:

• γράφω ένα μήνυμα = I am writing a message
• γράφω μήνυμα = can sound more informal, compressed, or context-dependent

For learners, it is best to use ένα μήνυμα when you mean a message.

Yes. Κοιμάμαι is one of many Greek verbs that use middle/passive-type endings but do not have a passive meaning in English.

So:

• κοιμάμαι = I sleep / I am sleeping

It is not the passive of another everyday verb meaning to sleep someone.

This is important for learners because Greek has many verbs that look passive in form but are active in meaning, for example verbs related to actions, states, or feelings. So it is best to learn κοιμάμαι as a complete dictionary form meaning to sleep.

Yes, it is grammatically correct, but the meaning shifts slightly.

• Όσο κοιμάται το μωρό... = while / for as long as the baby is sleeping...
• Όταν κοιμάται το μωρό... = when the baby is sleeping...

Όσο focuses more on the stretch of time during which the other action happens.
Όταν sounds a bit more like whenever/when.

So in this sentence, όσο is the better choice if you want to stress simultaneity over a period of time.