Buraya kadar gelmişken davetliler için bir sürahi limonata da getir.

Gelmişken is a very common Turkish structure meaning something like:

• since you’ve come
• now that you’ve come
• while you’re here / while you’ve come this far

It comes from:

• gel- = to come
• -miş = a past/perfect-like form
• -ken = while/when

So gelmişken does not literally map neatly to one single English tense. In real usage, it often gives the sense of:

• since that has already happened, you might as well do this too

In this sentence, Buraya kadar gelmişken... has the natural meaning: Since you’ve already come all the way here...

It often carries a practical or opportunistic tone, similar to while you’re at it.

Because buraya means to here / here (as a destination), while burada means here (at this place).

• bura / burası = this place / here
• buraya = to here
• burada = here, at here
• buradan = from here

Since the sentence talks about coming to this place, Turkish uses the directional ending -a / -e:

• buraya gelmek = to come here

So:

• Buraya kadar gelmişken = Since you’ve come this far / all the way here
• not Burada kadar or burada gelmişken, because the idea is movement toward a place.

Kadar means up to, as far as, or to the extent of.

So buraya kadar means:

• up to here
• this far
• all the way here

In this sentence, Buraya kadar gelmişken means: Since you’ve come this far / all the way here...

This phrase is very common in Turkish when someone wants to say: You’ve already made the trip, so you might as well do one more thing.

For example:

• Madem buraya kadar geldin... = Since you came all this way...
• Buraya kadar gelmişken şunu da yap. = Since you’ve come this far, do this too.

Davetliler için means for the guests or more literally for the invited people.

Breakdown:

• davetli = invited guest / invited person
• davetliler = the guests / invited people
• için = for

So:

• davetliler için = for the guests

This is a very common Turkish pattern:

• çocuklar için = for the children
• senin için = for you
• misafirler için = for the guests

Here it tells us who the lemonade is intended for.

Yes, exactly.

• bir = a / one
• sürahi = pitcher, jug
• limonata = lemonade

So bir sürahi limonata means:

• a pitcher of lemonade

This is similar to English container expressions:

• a glass of water
• a cup of tea
• a bottle of milk
• a pitcher of lemonade

In Turkish, this kind of structure is often just [container] + [substance] without a separate word meaning of:

• bir bardak su = a glass of water
• iki fincan kahve = two cups of coffee
• bir şişe şarap = a bottle of wine
• bir sürahi limonata = a pitcher of lemonade

Because this is an indefinite direct object.

In Turkish, direct objects are treated differently depending on whether they are specific/definite or indefinite/non-specific.

• bir sürahi limonata getir = bring a pitcher of lemonade
  → indefinite, so no accusative marking
• limonatayı getir = bring the lemonade
  → definite, so accusative marking appears

Compare:

• Kitap oku. = Read a book / do some book reading.
• Kitabı oku. = Read the book.

Here, bir sürahi limonata is just some pitcher of lemonade, not a specifically identified one already known to both speakers. That is why there is no accusative ending.

Here da means also / too / as well.

So:

• bir sürahi limonata da getir = bring a pitcher of lemonade too / as well

It suggests that this is an additional thing to bring.

A very natural English translation would be:

• Bring a pitcher of lemonade for the guests too.
• Since you’re already here, bring a pitcher of lemonade for the guests as well.

Important: this da is written separately because it is the enclitic meaning also/too.

Compare:

• Ben de geliyorum. = I’m coming too.
• Bir kahve de al. = Get a coffee as well.

Do not confuse it with suffixes like the locative -da/-de:

• evde = at home
  This one is written together.

Yes. Getir is the informal singular imperative of getirmek (to bring).

• getirmek = to bring
• getir! = bring!

So the sentence is giving a command or instruction: Bring a pitcher of lemonade too.

This form is used when speaking to:

• one person
• informally
• directly

Other possible versions would be:

• getirin = bring (plural / polite)
• getirsene = come on, bring it
• getirebilir misin? = can you bring...?
• getirsen iyi olur = it would be good if you brought...

So getir is the straightforward command form.

It is not completely fixed word-for-word, but it is a very natural and common pattern.

The pattern is:

• [verb]-mişken
• often with an idea like since/now that/while you’ve already done X

Examples:

• Buraya kadar gelmişken bir kahve içelim.
  Since we’ve come all this way, let’s have a coffee.
• Markete gitmişken ekmek de al.
  Since you’re going/have gone to the market, get bread too.
• Hazır başlamışken bitirelim.
  Since we’ve started / while we’re at it, let’s finish it.

So yes, the sentence uses a very common Turkish way of saying: while you’re at it or since you’ve already done that.

Yes, Madem buraya kadar geldin... is also very natural.

Both can mean something like: Since you came all this way...

But there is a nuance:

• Madem buraya kadar geldin...
  = Since / if you’ve come all this way...
  This can sound a bit more direct, logical, or argumentative.

• Buraya kadar gelmişken...
  = Since you’re already here / while you’ve come this far / while you’re at it...
  This often sounds more situational and practical.

So gelmişken often has the flavor of: that has already happened, so let’s make use of it

while madem can sound more like: given that this is true...

The sentence is:

Buraya kadar gelmişken davetliler için bir sürahi limonata da getir.

A rough structure is:

• Buraya kadar gelmişken = since you’ve come this far
• davetliler için = for the guests
• bir sürahi limonata da = a pitcher of lemonade too
• getir = bring

Turkish word order is flexible, but the unmarked order often puts the verb at the end. The sentence sounds very natural as written.

You could rearrange parts for emphasis, for example:

• Buraya kadar gelmişken bir sürahi limonata da davetliler için getir.
• Davetliler için de bir sürahi limonata getir.

But each version shifts the focus slightly.

The original order sounds natural because it first sets up the reason/context: Since you’ve already come this far... and then gives the instruction.

In this sentence, it is much closer to:

• since you’ve come all the way here
• now that you’re here
• since you’ve already come this far

It is not the same as a literal ongoing while coming here.

If Turkish wanted to emphasize the action in progress, it would use different forms. Here -mişken refers more to a completed or already-achieved situation that creates an opportunity for another action.

So the practical meaning is: You’re already here anyway, so bring a pitcher of lemonade too.

Literally, davetli means invited. As a noun, it commonly means guest in the sense of an invited guest.

So davetliler often means:

• the guests
• more literally, the invitees

Depending on context, Turkish might also use:

• misafirler = guests/visitors
• konuklar = guests

But davetliler is especially appropriate when the people are there because they were invited to an event.

So in this sentence, it suggests something like guests at a gathering, party, or event.

The tone is a fairly direct instruction, but not necessarily rude. It sounds like:

• a practical request
• a household or event-related instruction
• something said to someone already on the spot

The phrase Buraya kadar gelmişken... softens the command a little by giving it a reason: Since you’re already here / since you’ve come this far...

But the final verb getir is still an imperative, so the sentence is definitely a command or strong request rather than a polite question.

If you wanted to make it softer, Turkish might say:

• Buraya kadar gelmişken davetliler için bir sürahi limonata da getirir misin?
  Could you bring a pitcher of lemonade for the guests too, since you’re already here?

That would sound more polite.