Мы здесь надолго.

In Russian, the verb to be is usually omitted in the present tense.

So:

• Мы здесь = We are here
• Мы здесь надолго = We are here for a long time / We’re here to stay

If you wanted past or future, Russian would use forms of быть:

• Мы были здесь недолго = We were here only briefly
• Мы будем здесь долго = We will be here a long time

So the missing are is completely normal.

Надолго means for a long time, for long, or sometimes idiomatically to stay.

In this sentence, it gives the idea that the stay is not short-term:

• Мы здесь надолго = We’ll be here for quite a while
• depending on context, even We’re here to stay

It is an adverb, so it describes the duration of the situation.

This is a very common question.

• долго = for a long time / a long time
• надолго = for a long time, in terms of how long something will remain or last from now

In many contexts they are close, but надолго often emphasizes the idea of lasting for a substantial period.

Compare:

• Мы долго ждали. = We waited a long time.
• Мы здесь надолго. = We’re here for the long haul / for a long time.

A useful pair is:

• ненадолго = not for long
• надолго = for a long time

For example:

• Я зашёл ненадолго. = I stopped by briefly.

So in your sentence, надолго sounds very natural because it focuses on the expected duration of staying here.

It is one word: надолго.

Learners sometimes want to split it into на + долго, but in modern Russian this is a fixed adverb and is written together:

• надолго = correct
• на долго = incorrect in this meaning

The same is true for:

• ненадолго = for a short time / not for long

Because здесь means here in the sense of location, while сюда means to here / hither, expressing motion toward a place.

• Мы здесь = We are here → location
• Мы идём сюда = We are coming here → motion toward

In Мы здесь надолго, the speaker is already in the place, so здесь is the correct choice.

Usually you would not say just Здесь надолго as a normal complete sentence with the meaning We’re here for a long time.

Russian can omit pronouns, but only when the subject is clear from the verb form or from context. Here there is no verb form to show the person/number, so мы helps identify the subject.

So:

• Мы здесь надолго. = clear and natural

If context already makes the subject obvious, Russians might omit parts in conversation, but as a learner, keep мы here.

Yes. Russian word order is flexible, though the most neutral version here is:

• Мы здесь надолго.

Other orders are possible, but they change the emphasis:

• Мы надолго здесь. = stronger emphasis on for a long time
• Здесь мы надолго. = stronger emphasis on here
• Надолго мы здесь. = marked, less neutral, often stylistic or context-driven

For everyday use, Мы здесь надолго is the best default.

They are very close. Both can mean here.

• здесь = here
• тут = here

In many situations they are interchangeable:

• Мы здесь надолго.
• Мы тут надолго.

However, здесь is often felt to be a bit more neutral or standard, while тут can sound a little more conversational.

So your sentence with здесь is perfectly normal and neutral.

It can be both.

Literally, it means:

• We’ll be here for a long time

But depending on context, it can also sound idiomatic, like:

• We’re here to stay
• We’re not going anywhere

For example, a company, a political movement, or even houseguests might say it. The exact English translation depends on tone and situation.

The stress is on the second syllable:

• надо́лго

A rough pronunciation is:

• na-DOL-ga

More carefully:

• мы = my (but with Russian ы)
• здесь = roughly zdes’
• надо́лго = na-DOL-ga

Stress matters in Russian, so it is good to learn надо́лго with the stress included.

The natural opposite is:

• Мы здесь ненадолго. = We’re not here for long.

This is very useful because надолго / ненадолго form a common pair:

• надолго = for a long time
• ненадолго = not for long / briefly

So if you learn one, it is worth learning the other immediately.

It is neutral. It works in both spoken and written Russian.

• not especially formal
• not slangy
• very natural in everyday use

That makes it a good model sentence to remember.