Δεν μπορώ να μείνω άλλο στο γραφείο.

Δεν is the standard negation word used before verbs in Modern Greek. It means not.

So:

• μπορώ = I can
• δεν μπορώ = I cannot / I can’t

In Greek, δεν usually goes directly before the verb phrase it negates, so Δεν μπορώ is the normal way to say I can’t.

In Modern Greek, verbs like μπορώ (I can) are followed by να before another verb.

So the pattern is:

• μπορώ να + verb

Examples:

• Μπορώ να φύγω = I can leave
• Μπορώ να μιλήσω = I can speak
• Μπορώ να μείνω = I can stay

You cannot normally omit να here. It is a basic part of Greek grammar after many verbs of wanting, being able, trying, needing, etc.

Yes, the dictionary form is μένω = I stay / I am staying.

But after να, Greek often uses a different stem depending on how the action is viewed. Here, μείνω is the perfective form of the verb, often called the aorist subjunctive form in learner grammar.

Very roughly:

• να μένω = to be staying, to stay habitually, to stay as an ongoing situation
• να μείνω = to stay, as a single complete event or period

In this sentence, να μείνω fits the idea of stay any longer / remain.

So although the basic verb is μένω, after να it is very common to get μείνω.

Because the sentence is talking about remaining at the office from now on, not about a repeated habit.

Δεν μπορώ να μείνω άλλο στο γραφείο means something like I can’t stay at the office any longer. The speaker is treating the staying as one bounded situation that cannot continue.

If you used να μένω, it would sound more like an ongoing or habitual idea, such as I can’t be staying / I can’t keep staying in a broader sense. In many real contexts, Greeks strongly prefer να μείνω here.

Yes, άλλος / άλλη / άλλο often means other or another.

But in this sentence, άλλο is being used adverbially, and with negation it means any more, any longer, or further.

So:

• Δεν μπορώ να μείνω άλλο = I can’t stay any longer / any more

This is a very common use. It does not mean another office or something else here.

στο is a contraction of:

• σε = in, at, to
• το = the

So:

• σε το → στο

Therefore:

• στο γραφείο = in the office / at the office

This kind of contraction is completely normal in Modern Greek:

• στο σπίτι = in the house / at home
• στο σχολείο = at school
• στο γραφείο = at the office

Yes. After the preposition σε (in, at, to), Modern Greek normally uses the accusative.

The noun is:

• το γραφείο = the office

For this neuter noun, the nominative and accusative singular look the same:

• nominative: το γραφείο
• accusative: το γραφείο

So even though it is accusative after σε / στο, the form does not change visibly.

It can mean both, depending on context.

• γραφείο = office
• γραφείο = desk

In this sentence, because of στο γραφείο, the most natural meaning is usually at the office or in the office, but context decides.

For example:

• Είμαι στο γραφείο could mean I’m at the office
• In another context, it could also mean I’m at the desk

Yes, Greek word order is more flexible than English, though not completely free.

The neutral order here is:

• Δεν μπορώ να μείνω άλλο στο γραφείο.

You may also hear variations for emphasis, such as:

• Δεν μπορώ άλλο να μείνω στο γραφείο.
• Στο γραφείο δεν μπορώ να μείνω άλλο.

These alternatives shift emphasis a bit, but the original sentence is the most straightforward and natural neutral version.

Yes. πια is another common word meaning any more / any longer / no longer in negative contexts.

So both are possible:

• Δεν μπορώ να μείνω άλλο στο γραφείο.
• Δεν μπορώ να μείνω πια στο γραφείο.

There can be a slight nuance:

• άλλο often emphasizes further continuation: any longer
• πια often emphasizes from now on no longer or not anymore

In many everyday situations, they are very close in meaning.

It is neutral and natural in everyday speech. It is not especially formal or especially casual.

A native speaker could say it in normal conversation, at work, or in many standard situations.

If you wanted to sound a bit more formal, you might choose slightly different wording depending on context, but this sentence itself is perfectly standard Greek.

Yes, mainly the stress.

• μείνω is stressed on the first syllable: MEE-no
• γραφείο is stressed on the final -είο part: gra-fee-O

Stress matters in Greek, so learners should pay attention to the written accent marks:

• μένω
• μείνω
• γραφείο

Those accents are not optional in normal writing.