Süt kaynadı mı ocağı kapat.

In this sentence, mı is the yes/no question particle.

By itself, Süt kaynadı mı? means Did the milk boil?

But when a clause like that is followed by another clause, especially an instruction, Turkish often uses it with a meaning like:

• if
• when
• once

So Süt kaynadı mı ocağı kapat is literally something like:

• Has the milk boiled? Turn off the stove.

But the natural meaning is:

• When/if the milk boils, turn off the stove.

This is a very common Turkish pattern.

That is a very common learner question.

Kaynadı is the simple past form of kaynamak (to boil / to come to a boil).

Even though English would usually say if the milk boils or when the milk boils, Turkish often uses a structure with past + mı to mean:

• once it has happened
• when it happens
• if it happens

So here kaynadı mı does not really feel like ordinary past time in English. It is more like:

• once the milk has boiled
• when the milk boils

This is just a normal Turkish pattern, especially in spoken instructions.

Because Turkish does not always need one.

English often uses separate linking words like:

• if
• when
• after

Turkish can express the same idea through verb forms and particles instead.
Here, the combination kaynadı mı already creates that if/when sense.

So instead of saying something directly equivalent to if the milk boils, Turkish says:

• Süt kaynadı mı ...

This is one of several ways Turkish can build time/condition clauses.

Structurally, it is a question form, but in this sentence it functions more like a condition/time clause.

Compare:

• Süt kaynadı mı? = Did the milk boil?
  → an actual question

• Süt kaynadı mı ocağı kapat.
  → When/if the milk boils, turn off the stove.

So the same form can be:

1. a genuine yes/no question, or
2. a clause meaning if/when once X happens

The context tells you which meaning is intended.

Because ocağı is the definite direct object form of ocak.

Here is what is happening:

• dictionary form: ocak = stove, burner, hob
• as a definite object: ocağı

Turkish usually marks a specific/definite direct object with the accusative ending.

So:

• ocak kapat would sound wrong here
• ocağı kapat = turn off the stove / burner

There is also a sound change:

• ocak
  • accusative ending becomes ocağı
• final k often changes to ğ before a vowel-initial ending

So this is both:

1. an accusative ending, and
2. a normal consonant change

Literally, kapatmak means to close, to shut, or to turn off, depending on context.

So ocağı kapat means:

• turn off the stove
• turn off the burner
• switch off the heat

In Turkish, kapatmak is often used for turning things off:

• televizyonu kapat = turn off the TV
• ışığı kapat = turn off the light

So although the core idea is close/shut, the natural English translation here is turn off.

Because Turkish often leaves the subject out when it is already clear from the verb form.

Kapat is the imperative form for you singular:

• kapat! = turn it off!

So Turkish does not need to say sen (you) unless it wants emphasis or contrast.

That means:

• ocağı kapat = turn off the stove
• sen ocağı kapat = you turn off the stove
  → more emphatic

Omitting the pronoun is completely normal.

Kapat is the informal singular imperative of kapatmak.

So it is used when telling one person to do something:

• kapat = turn off
• aç = open / turn on
• bekle = wait

If you wanted a more polite or plural command, Turkish would use different forms, such as:

• ocağı kapatın = turn off the stove / please turn off the stove / you all turn off the stove

So kapat is direct and common in everyday speech.

Turkish usually puts the verb at the end of its clause.

Here the sentence has two parts:

1. Süt kaynadı mı
2. ocağı kapat

In both parts, the verb comes at or near the end of the clause:

• süt = subject
• kaynadı = verb
• mı = question particle
• ocağı = object
• kapat = verb

Also, Turkish often puts the condition or time clause first, and the main instruction second:

• When the milk boils, turn off the stove.

So the order is very natural.

These two words contain sounds that English speakers often find tricky.

mı

The ı is the dotless i.
It is not like English ee.

It is a more central, relaxed vowel, somewhat like the vowel in the second syllable of sofa, but not exactly.
So mı is roughly like muh without a strong uh.

ocağı

Important points:

• o-ca-ğı
• the c in Turkish is pronounced like English j in jam
• the ğ usually is not pronounced as a strong consonant
• it often lengthens or smooths the vowel before it

So ocağı sounds roughly like:

• o-ja-uh
• with a soft transition, not a hard g

You do not pronounce ğ like English g in go.

Yes, it is natural, especially in spoken instructions.

That said, Turkish also has other common ways to say the same idea, such as:

• Süt kaynayınca ocağı kapat.
• Süt kaynadığında ocağı kapat.

These also mean:

• When the milk boils, turn off the stove.

The version with kaynadı mı is especially common in everyday spoken Turkish and can sound very immediate and practical.

That is a very useful distinction.

• kaynamak = to boil / to come to a boil
  → the liquid itself boils

• kaynatmak = to boil something / to make something boil
  → someone causes it to boil

So here:

• Süt kaynadı = The milk boiled / came to a boil

But:

• Sütü kaynattı = He/she boiled the milk

This is a common Turkish verb pair:

• intransitive: kaynamak
• transitive/causative: kaynatmak

Yes. Depending on context, it can feel like:

• when the milk boils
• once the milk has boiled
• if the milk has boiled

In real life, the intended meaning is usually clear from the situation.
If someone is giving cooking instructions, English will most naturally say:

• When the milk boils, turn off the stove.

But grammatically, the Turkish pattern is flexible enough to overlap with if and once as well.