Otobüs beklerken kitap okuyorum.

-ken adds the idea of while or when.

So beklerken means while waiting or when waiting. In this sentence, it connects two actions happening at the same time:

• otobüs beklerken = while waiting for the bus / a bus
• kitap okuyorum = I am reading a book / I am reading

So the structure is basically While doing X, I am doing Y.

It is formed from the verb beklemek (to wait) using its common aorist stem plus -ken:

• beklemek → bekler → beklerken

So:

• bekler = the aorist form/stem
• -ken = while/when

This is a very common pattern in Turkish:

• gelirken = while coming
• giderken = while going
• okurken = while reading
• yaparken = while doing

You do not normally build this with the full -yor form. Turkish prefers this -ken structure.

Because Turkish often leaves out the subject pronoun when the verb already shows who the subject is.

Here, okuyorum ends in -yorum, which tells you the subject is I.

• okuyorum = I am reading

So ben is not necessary. You could say Ben kitap okuyorum, but that would usually add emphasis, contrast, or clarity.

Okuyorum is in the present continuous tense, formed with -yor.

• oku- = read
• oku-yor-um = I am reading

In this sentence, it shows an action happening right now / around now.

Also notice the y in okuyorum. Turkish often inserts a buffer consonant between vowels, so you get:

• oku + yorum → okuyorum

Because Turkish often uses a bare noun as an indefinite, non-specific object.

So kitap okuyorum can mean:

• I am reading a book
• I am reading
• I am doing some book-reading

It sounds natural and general.

If you say bir kitap okuyorum, you make the one book / a book idea more explicit.

Compare:

• kitap okuyorum = I’m reading, I’m reading a book, book-reading is the activity
• bir kitap okuyorum = I’m reading a book
• kitabı okuyorum = I’m reading the / that specific book

That depends on whether the bus is specific or non-specific.

Turkish marks a specific definite direct object with the accusative ending:

• otobüsü bekliyorum / beklerken = I am waiting for the specific bus

But with a non-specific object, Turkish often uses the bare form:

• otobüs bekliyorum / beklerken = I am waiting for a bus / bus-waiting is the activity

So in your sentence, otobüs without -ü sounds more indefinite or general.

This is one place where English and Turkish do not match perfectly. English may say the bus in a natural translation even when Turkish uses the bare noun.

Because Turkish uses the verb beklemek differently from English.

In English, you say:

• wait for the bus

In Turkish, beklemek takes a direct object, so you say:

• otobüs beklemek

Literally, it looks more like to wait the bus, even though the real meaning is to wait for the bus.

This is just a verb pattern you need to learn:

• birini beklemek = to wait for someone
• otobüs beklemek = to wait for a bus

Turkish word order is flexible, but the most neutral pattern often puts:

1. background/time information first
2. the main verb at the end

So:

• Otobüs beklerken = while waiting for the bus
• kitap okuyorum = I am reading a book

This makes the sentence feel very natural: first the situation, then the main action.

You could rearrange it in some contexts, but this version is a very normal, neutral order.

Not explicitly here, but it is understood to have the same subject as the main verb.

So in this sentence, the person who is waiting is also the person who is reading:

• I am reading while I am waiting

Turkish often leaves that shared subject unspoken.

If the subjects were different, Turkish would usually make that clearer. For example:

• Ben otobüs beklerken o kitap okuyordu.
• While I was waiting for the bus, he/she was reading a book.

Yes. Because both otobüs and kitap are bare nouns, the sentence is slightly more open-ended than one fixed English translation.

Depending on context, it could be understood as:

• I’m reading a book while waiting for a bus.
• I’m reading while waiting for the bus.
• I read a book while waiting for the bus would be less likely here, because okuyorum is clearly present continuous.

So the exact English wording can vary a bit, but the Turkish structure stays the same.