Yangın alarmını duyar duymaz acil çıkışa gittik.

Duyar duymaz means as soon as (someone) hears/heard or the moment (someone) heard.

It is a very common Turkish structure:

• verb stem + -(A)r ... -maz
• Here: duy-ar duy-maz

So:

• duymak = to hear
• duyar duymaz = as soon as [someone] hears/heard

In this sentence, it means:

• Yangın alarmını duyar duymaz = As soon as we heard the fire alarm

It gives a sense of immediacy.

This is just how the Turkish as soon as pattern works. Turkish often expresses this idea by using the same verb twice:

• first in a form like duyar
• then in a negative-looking form like duymaz

Together, they do not mean hears, doesn’t hear. As a fixed structure, they mean:

• the moment one hears
• as soon as one hears

You can see the same pattern in other verbs too:

• gelir gelmez = as soon as he/she came
• biter bitmez = as soon as it finished
• görür görmez = as soon as he/she saw

So this repetition is grammatical, not stylistic.

All of these can be used, but they have slightly different feels.

• duyar duymaz = as soon as / immediately when
• duyunca = when / upon hearing
• duyduktan sonra = after hearing

In your sentence, duyar duymaz is the best choice if you want to stress that they went to the emergency exit immediately after hearing the alarm.

So:

• Yangın alarmını duyar duymaz acil çıkışa gittik. = We went to the emergency exit as soon as we heard the fire alarm.

Compared with:

• Yangın alarmını duyunca acil çıkışa gittik. = When we heard the fire alarm, we went to the emergency exit.

This is still natural, but slightly less immediate.

Because alarmını is the definite direct object form.

The object here is yangın alarmı = fire alarm. Since it is something specific that was heard, Turkish marks it with the accusative ending.

Basic pattern:

• alarmı = its alarm / the alarm as part of the noun phrase
• alarmını = the fire alarm as a definite object

What is happening is:

• yangın alarmı = fire alarm
  (a compound noun)
• when used as a definite object, it becomes yangın alarmını

So the -nı here is the object marking attached after the compound form.

Because yangın alarmı is a Turkish noun compound.

• yangın = fire
• alarm = alarm
• yangın alarmı = fire alarm

In Turkish, compounds like this often take a compound marker on the second noun:

• ev kapısı = house door
• araba kapısı = car door
• yangın alarmı = fire alarm

Then, if the whole compound becomes a definite object, you add the accusative:

• yangın alarmı → yangın alarmını

So the word is not just alarm + accusative. It is:

• alarmı = the compound form
• alarmını = the compound form + accusative

Because gitmek usually takes the dative case when you go to a place.

• acil çıkış = emergency exit
• acil çıkışa = to the emergency exit

The ending -a / -e is the dative ending.

Examples:

• okula gittim = I went to school
• eve gittik = we went home
• acil çıkışa gittik = we went to the emergency exit

So -a here shows direction toward the exit.

Gittik means we went.

It breaks down like this:

• git- = go
• -ti- = past tense
• -k = we

So:

• gittik = we went

This is simple past tense, often used for completed actions.

Because Turkish usually does not need subject pronouns when the verb already shows the person.

• gittik already means we went
• so biz = we is unnecessary unless you want emphasis

You could say:

• Biz yangın alarmını duyar duymaz acil çıkışa gittik.

But this would sound more like:

• We went to the emergency exit as soon as we heard the fire alarm.

That extra biz adds emphasis or contrast.

The sentence’s word order is natural, but Turkish word order is somewhat flexible.

Neutral order:

• Yangın alarmını duyar duymaz acil çıkışa gittik.

This is very natural because it goes:

1. background/time clause
2. destination
3. main verb

Turkish often puts the main verb at the end.

You might also hear other orders for emphasis, but the standard structure here is very normal and clear.

Yes. Even though duyar duymaz most strongly means as soon as, in natural English it can often be translated as:

• When we heard the fire alarm, we went to the emergency exit
• As soon as we heard the fire alarm, we went to the emergency exit
• The moment we heard the fire alarm, we went to the emergency exit

The best translation depends on how much you want to stress the immediacy.

Because the verb stem is git-, which already ends in t, and the past tense suffix here begins with t as well.

So:

• git-
  • -tik
• becomes gittik

This is completely regular in spelling.

Compare:

• gitmek → gitti = he/she went
• gitmek → gittik = we went

Yes, that is also correct.

It means roughly:

• The moment we heard the fire alarm, we went to the emergency exit.

Compare the styles:

• duyar duymaz = very common, compact, immediate
• duyduğumuz anda = a bit more explicit, literally at the moment that we heard
• duyunca = simpler, more general when we heard

All are possible, but duyar duymaz is especially good for quick, immediate action.