"O yazıyor."

Translation: He is writing.

[fitzo1]

Is "he writes" an acceptable answer?

[jasiek.mateusz]

No, that would be 'o yazar', the 3rd person singular present simple indicative positive of 'yazmak'.

[leandro87]

The root here is Yazı? It has something to do with Summer or just coincidence?

[SinanOztur1]

"yaz" is the root for the verb "yazmak". As you know root of a verb is also its imperative form of second person in Turkish so "yaz!" also means "write!".

"Yaz" is also a noun in Turkish meaning "summer" but this has nothing to do with the verb form, nor derived from there. :)

[ul10003]

she is writing was not accepted