Masadaki anahtarı görüyor musun?

A natural breakdown is:

• masadaki = on the table / the one on the table
• anahtarı = the key as a direct object
• görüyor musun = do you see?

So the sentence is literally structured more like:

• the key on the table
  • do you see?

Turkish usually puts the verb near the end, unlike English.

Masadaki comes from:

• masa = table
• -da = in / on / at
• -ki = a suffix that turns that location phrase into something adjective-like

So:

• masada = on the table / at the table
• masadaki = the one that is on the table / the thing on the table

Then:

• masadaki anahtar = the key on the table

This -ki structure is very common in Turkish.

Turkish -da / -de / -ta / -te is a general location ending. It can correspond to English in, on, or at, depending on context.

For example:

• evde = at home / in the house
• masada = on the table
• okulda = at school

So Turkish does not choose different endings the way English chooses different prepositions. English decides the best translation from context.

Because anahtarı has the accusative ending, which is used for a specific, known direct object.

• anahtar = key
• anahtarı = the key / that key, as the object of the verb

In this sentence, the speaker means a particular key, not just any key. That is why the object takes the accusative.

A useful contrast:

• Anahtar görüyor musun? = Do you see a key? / any key?
• Anahtarı görüyor musun? = Do you see the key?

By itself, it can look similar, so this is a very good question.

• anahtarı can mean his/her key in some contexts
• but here it is best understood as anahtar + accusative

A helpful clue is this:

• his/her key = anahtarı
• his/her key as a definite direct object = anahtarını

That extra -n- appears before another ending.

So in Masadaki anahtarı görüyor musun?, anahtarı is simply the key as the direct object.

It comes from the verb görmek = to see.

• gör- = the verb stem
• -üyor / -yor = the present continuous suffix

So:

• görüyor = is seeing / sees

In Turkish, this form is often used where English might use either:

• Are you seeing...?
• Do you see...?

In this sentence, the natural English translation is Do you see...?

Because in Turkish yes/no questions are built with the question particle mi / mı / mu / mü, and the person ending goes on that particle, not on the verb.

So the pattern is:

• verb + question particle + person ending

Here that gives:

• görüyor mu-sun

not:

• görüyor-sun mu

This is one of the most important sentence patterns in Turkish.

Because the yes/no question marker is written as a separate word in Turkish:

• görüyor musun
• geldi mi
• biliyor mu

However, it is still tightly connected grammatically, and personal endings attach to it:

• mu-sun
• mi-yim
• mu-sunuz

So it is separate in spelling, but not separate in function.

Because of vowel harmony.

The question particle changes form:

• mı
• mi
• mu
• mü

Here it becomes mu because it follows a word whose last vowel fits that harmony pattern.

Then the second-person singular ending also harmonizes:

• -sın / -sin / -sun / -sün

So:

• görüyor mu
• mu + sun
• görüyor musun

This is completely normal Turkish vowel harmony at work.

It is built into musun.

The -sun part marks you singular.

So Turkish often does not need a separate subject pronoun. The sentence already tells you who is meant.

• görüyor musun = do you see?

If you want extra emphasis, you can add sen:

• Sen masadaki anahtarı görüyor musun?

But most of the time, sen is unnecessary.

Because Turkish normally prefers subject-object-verb order.

In this sentence, the subject you is not stated separately, so what you see is mainly:

• object: masadaki anahtarı
• verb phrase: görüyor musun

That final-verb pattern is very typical in Turkish.

Turkish word order can change for emphasis, but this sentence uses the most neutral, standard order.

You would use musunuz instead of musun:

• Masadaki anahtarı görüyor musunuz?

This can mean:

• Do you all see the key on the table?
• or polite singular Do you see the key on the table?

So:

• musun = singular informal
• musunuz = plural or polite