Learn Hardcore Turkish: Hasar raporunu sigortaya gönderirken fotoğrafları da ekledim. - I attached the photos when I sent the damage report to the insurance company.

In Turkish, a definite direct object takes the accusative suffix -ı/-i/-u/-ü. Here you actually see two suffixes on raporunu:
• -un = 2nd person singular possessive (“your report”)
• -u = accusative case marker (“the report” as an object)
So rapor-un-u literally means “your report” as the definite object of the verb.

Why is sigorta followed by -ya in sigortaya?

The suffix -a/-e marks the dative case in Turkish (“to” someone or something). Attaching -ya to sigorta gives sigorta-ya, meaning “to the insurance (company).”

What does the -ken at the end of gönderirken mean?

-ken is a suffix that turns a verb into a “while/when doing X” clause.
• gönder- = “to send”
• -irken = “while/when …ing”
Together gönderirken = “while sending” or “when sending.”

Why is fotoğrafları in the plural and with -ı at the end?

fotoğraf means “photo.” To pluralize, Turkish adds -lar/-ler: fotoğraflar = “photos.” Since the photos are a definite object here, we add the accusative suffix -ı:
• fotoğraf-lar-ı = “the photos” (as the object of the verb)

What does da do in fotoğrafları da ekledim?

da is the “also/too” particle. Placed after fotoğrafları, it shows that you included the photos in addition to the report. English: “I also attached the photos.”

How is ekledim formed, and what tense/person does it express?

Breakdown of ekledim:
• ekle- = verb stem “to add/attach”
• -di = simple past tense suffix
• -m = 1st person singular suffix (“I”)
So ekle-di-m = “I added” or “I attached.”