Otobüs geldi mi seni arayacağım.

In this sentence, geldi mi is not really functioning as a normal yes/no question.

Although mi is usually the question particle, in sentences like this:

• Otobüs geldi mi seni arayacağım.

it often means:

• when the bus comes
• once the bus arrives
• as soon as the bus arrives

So this structure can express a time relationship, not just a direct question.

A very literal breakdown is:

• otobüs = the bus
• geldi = came / has come
• mi = question particle, but here giving a meaning like when/once
• seni = you
• arayacağım = I will call

So the whole sentence means something like:

• I’ll call you when the bus arrives.

That is a very common question. In English, this feels strange at first.

Here geldi mi is a fixed Turkish pattern that often means when/once X happens. Even though geldi looks like simple past (came), the whole expression does not simply mean past time here.

So:

• geldi mi in isolation can mean did it come?
• but in a larger sentence like this, it can mean when it comes / once it has come

Turkish often uses forms that look past-related in patterns that express completion before another action.

In this sentence:

• first event: the bus arrives
• second event: I call you

So the idea is:

• Once the bus has arrived, I will call you.

Because mi is a separate particle in Turkish.

It is usually written separately from the word before it, although in speech it clings closely to that word. So:

• geldi mi
• not geldimi

This is true in general with the question particle:

• geldi mi? = did he/she/it come?
• evde mi? = is he/she/it at home?
• sen mi? = is it you?

The particle changes form by vowel harmony:

• mı, mi, mu, mü

Here it is mi because of the vowel pattern in geldi.

Because seni is the accusative form of sen.

The verb aramak means to call someone, and the person being called is the direct object. In Turkish, definite direct objects usually take the accusative ending.

So:

• sen = you
• seni = you (as the object)

Compare:

• Ben seni arayacağım. = I will call you.
• Sen beni arayacaksın. = You will call me.

In this sentence, seni is correct because you are the one being called.

It is built into the verb ending.

• arayacağım = I will call

Breakdown:

• ara- = call
• -yacak / -ecek = future marker
• -ım / -im / -um / -üm = I ending, adjusted by vowel harmony
• the y is a buffer consonant

So arayacağım already includes the subject I.

That means Turkish does not need ben here unless you want emphasis:

• Seni arayacağım. = I will call you.
• Ben seni arayacağım. = I will call you. / It is I who will call you.

Turkish word order is flexible, but this order is very natural.

The first part:

• Otobüs geldi mi

sets up the time condition: when the bus arrives

Then the main clause comes:

• seni arayacağım = I will call you

So the structure is basically:

• When X happens, I will do Y.

This is a very common Turkish pattern:

• Eve vardım mı sana haber veririm. = When I get home, I let you know.
• O geldi mi başlarız. = When he/she arrives, we start.

You could also hear slightly different orders depending on emphasis, but the given sentence is perfectly normal.

Yes, the meaning is very close.

• Otobüs geldi mi seni arayacağım.
• Otobüs gelince seni arayacağım.

Both can mean:

• I’ll call you when the bus arrives.

However, there is a slight difference in feel:

• gelince is a straightforward when/once ... happens form
• geldi mi can sound a bit more conversational and can emphasize the idea of the moment it happens

So both are natural, but they are built differently grammatically.

You may also see:

• Otobüs geldiğinde seni arayacağım.

This also means when the bus arrives/has arrived, I’ll call you, but sounds a bit more neutral or formal depending on context.

There are two different subjects, one for each clause.

1. Otobüs geldi mi

   • subject: otobüs
   • action: arrives / has arrived

2. seni arayacağım

   • hidden subject: I
   • action: will call you

So:

• the bus arrives
• I call you

This can be confusing because Turkish often omits pronouns when the verb ending already shows the subject.

Yes. Context is what tells you how to understand it.

By itself:

• Otobüs geldi mi? = Did the bus come?

But in a sentence like:

• Otobüs geldi mi seni arayacağım.

it is understood as:

• When the bus comes / once the bus has arrived, I’ll call you.

So the same words can work differently depending on whether they are being used as:

• a real question, or
• a time clause inside a larger sentence

In speech, intonation also helps distinguish these uses.

Both are possible in Turkish, but they are not exactly the same in tone.

• arayacağım = I will call
• ararım = I call / I will call / I usually call, depending on context

In this sentence, arayacağım clearly points to a specific future action:

• after the bus arrives, I will call you

So it sounds more definite and more directly future-oriented.

If someone said:

• Otobüs geldi mi seni ararım.

that could also be natural, especially in conversation, but it may sound a little more like a general promise or habitual-style future.

A few small things may help:

• Otobüs is pronounced roughly o-to-büs
• geldi mi is said smoothly together in speech, even though mi is written separately
• arayacağım is long and may sound challenging at first

A rough pronunciation guide:

• Otobüs geldi mi seni arayacağım
• oh-toh-BUHS gel-DEE mee seh-NEE ah-rah-yah-JAH-uhm

A couple of notes:

• The ğ in arayacağım is usually not pronounced like a strong consonant. It often lengthens or softens the surrounding vowels.
• The stress in Turkish is not always where an English speaker expects it, so listening to native audio is very helpful.

Yes, it is natural and understandable.

A native speaker might also say:

• Otobüs gelince seni arayacağım.
• Otobüs geldiğinde seni arayacağım.

But Otobüs geldi mi seni arayacağım is also a normal conversational way to say it.

So as a learner, the main thing to notice is the pattern:

• X geldi mi, Y yapacağım

which often means:

• When X happens, I’ll do Y.