O da geç yatmayı tercih ediyor.

he

Breakdown of O da geç yatmayı tercih ediyor.

• da: also
• tercih etmek: to prefer
• geç: late

Questions & Answers about O da geç yatmayı tercih ediyor.

What does the particle "da" in "O da" do? Is it the same as the locative "-da/-de"?

"da/de" here is the enclitic meaning also/too, attaching to the previous word to indicate addition or similarity. It is written as a separate word and follows vowel harmony for a/e:

• After back vowels (a, ı, o, u): use da → O da (He/She too)
• After front vowels (e, i, ö, ü): use de → Ben de (I too)

It is NOT the same as the locative suffix "-da/-de/-ta/-te" (in/at/on), which is attached directly to the noun, can become -ta/-te after a voiceless consonant, and takes an apostrophe with proper names:

• Enclitic "also": Ali de geldi. (Ali also came.)
• Locative: Ali'de para var. (Ali has money on him.) / odada (in the room)

In your sentence, O da means "he/she also."

Why is it "yatmayı" and not "yatmak"?

Because tercih etmek (“to prefer”) selects a verbal noun complement in the form -mA + accusative. So you nominalize the verb and mark it as the object:

• yat-ma-(y)ı = the act of going to bed (as the thing preferred)

Using bare -mek after tercih etmek is not standard. You’ll typically see:

• X yapmayı tercih ediyor = “prefers to do X”

How exactly is "yatmayı" formed?